🚧 Added support for markdown preview table

# Conflicts:
#	frontend/package-lock.json

frontend/package.json

@@ -53,33 +53,30 @@
     "@codemirror/view": "^6.38.8",
     "@cospaia/prettier-plugin-clojure": "^0.0.2",
     "@lezer/highlight": "^1.2.3",
-    "@lezer/lr": "^1.4.3",
-    "@mdit/plugin-katex": "^0.23.2",
-    "@mdit/plugin-tasklist": "^0.22.2",
+    "@lezer/lr": "^1.4.4",
     "@prettier/plugin-xml": "^3.4.2",
     "@replit/codemirror-lang-svelte": "^6.0.0",
     "@toml-tools/lexer": "^1.0.0",
     "@toml-tools/parser": "^1.0.0",
-    "@types/markdown-it": "^14.1.2",
+    "@types/katex": "^0.16.7",
     "codemirror": "^6.0.2",
     "codemirror-lang-elixir": "^4.0.0",
     "colors-named": "^1.0.2",
     "colors-named-hex": "^1.0.2",
     "groovy-beautify": "^0.0.17",
-    "highlight.js": "^11.11.1",
     "hsl-matcher": "^1.2.4",
     "java-parser": "^3.0.1",
+    "katex": "^0.16.25",
     "linguist-languages": "^9.1.0",
-    "markdown-it": "^14.1.0",
+    "marked": "^17.0.1",
     "mermaid": "^11.12.1",
-    "npm": "^11.6.3",
     "php-parser": "^3.2.5",
     "pinia": "^3.0.4",
     "pinia-plugin-persistedstate": "^4.7.1",
-    "prettier": "^3.6.2",
+    "prettier": "^3.7.2",
     "sass": "^1.94.2",
-    "vue": "^3.5.24",
-    "vue-i18n": "^11.2.1",
+    "vue": "^3.5.25",
+    "vue-i18n": "^11.2.2",
     "vue-pick-colors": "^1.8.0",
     "vue-router": "^4.6.3"
   },
@@ -91,18 +88,18 @@
     "@wailsio/runtime": "latest",
     "cross-env": "^10.1.0",
     "eslint": "^9.39.1",
-    "eslint-plugin-vue": "^10.6.0",
+    "eslint-plugin-vue": "^10.6.2",
     "globals": "^16.5.0",
-    "happy-dom": "^20.0.10",
+    "happy-dom": "^20.0.11",
     "typescript": "^5.9.3",
-    "typescript-eslint": "^8.47.0",
+    "typescript-eslint": "^8.48.0",
     "unplugin-vue-components": "^30.0.0",
     "vite": "npm:rolldown-vite@latest",
     "vite-plugin-node-polyfills": "^0.24.0",
     "vitepress": "^2.0.0-alpha.12",
-    "vitest": "^4.0.13",
+    "vitest": "^4.0.14",
     "vue-eslint-parser": "^10.2.0",
-    "vue-tsc": "^3.1.4"
+    "vue-tsc": "^3.1.5"
   },
   "overrides": {
     "vite": "npm:rolldown-vite@latest"

frontend/src/assets/styles/variables.css

@@ -49,6 +49,27 @@
   --voidraft-loading-glow: 0 0 10px rgba(50, 255, 50, 0.5), 0 0 5px rgba(100, 255, 100, 0.5);
   --voidraft-loading-done-color: #66ff66;
   --voidraft-loading-overlay: linear-gradient(transparent 0%, rgba(10, 16, 10, 0.5) 50%);
+
+  /* Markdown 代码块样式 - 暗色主题  */
+  --cm-codeblock-bg: rgba(46, 51, 69, 0.8);
+  --cm-codeblock-radius: 0.4rem;
+
+
+  /* Markdown 内联代码样式 */
+  --cm-inline-code-bg: oklch(28% 0.02 255);
+
+  /* Markdown 上标/下标样式 */
+  --cm-superscript-color: inherit;
+  --cm-subscript-color: inherit;
+
+  /* Markdown 高亮样式 */
+  --cm-highlight-background: rgba(250, 204, 21, 0.35);
+
+  /* Markdown 表格样式 - 暗色主题 */
+  --cm-table-bg: rgba(35, 40, 52, 0.5);
+  --cm-table-header-bg: rgba(46, 51, 69, 0.7);
+  --cm-table-border: rgba(75, 85, 99, 0.35);
+  --cm-table-row-hover: rgba(55, 62, 78, 0.5);
 }
 
 /* 亮色主题 */
@@ -96,6 +117,26 @@
   --voidraft-loading-glow: 0 0 10px rgba(0, 160, 0, 0.3), 0 0 5px rgba(0, 120, 0, 0.2);
   --voidraft-loading-done-color: #008800;
   --voidraft-loading-overlay: linear-gradient(transparent 0%, rgba(220, 240, 220, 0.5) 50%);
+
+  /* Markdown 代码块样式 - 亮色主题 */
+  --cm-codeblock-bg: oklch(92.9% 0.013 255.508);
+  --cm-codeblock-radius: 0.4rem;
+
+  /* Markdown 内联代码样式 */
+  --cm-inline-code-bg: oklch(92.9% 0.013 255.508);
+
+  /* Markdown 上标/下标样式 */
+  --cm-superscript-color: inherit;
+  --cm-subscript-color: inherit;
+
+  /* Markdown 高亮样式 */
+  --cm-highlight-background: rgba(253, 224, 71, 0.45);
+
+  /* Markdown 表格样式 - 亮色主题 */
+  --cm-table-bg: oklch(97.5% 0.006 255);
+  --cm-table-header-bg: oklch(94% 0.01 255);
+  --cm-table-border: oklch(88% 0.008 255);
+  --cm-table-row-hover: oklch(95% 0.008 255);
 }
 
 /* 跟随系统的浅色偏好 */
@@ -144,5 +185,25 @@
     --voidraft-loading-glow: 0 0 10px rgba(0, 160, 0, 0.3), 0 0 5px rgba(0, 120, 0, 0.2);
     --voidraft-loading-done-color: #008800;
     --voidraft-loading-overlay: linear-gradient(transparent 0%, rgba(220, 240, 220, 0.5) 50%);
+
+    /* Markdown 代码块样式 - 亮色主题 */
+    --cm-codeblock-bg: oklch(92.9% 0.013 255.508);
+    --cm-codeblock-radius: 0.4rem;
+
+    /* Markdown 内联代码样式 */
+    --cm-inline-code-bg: oklch(92.9% 0.013 255.508);
+
+    /* Markdown 上标/下标样式 */
+    --cm-superscript-color: inherit;
+    --cm-subscript-color: inherit;
+
+    /* Markdown 高亮样式 */
+    --cm-highlight-background: rgba(253, 224, 71, 0.45);
+
+    /* Markdown 表格样式 - 亮色主题 */
+    --cm-table-bg: oklch(97.5% 0.006 255);
+    --cm-table-header-bg: oklch(94% 0.01 255);
+    --cm-table-border: oklch(88% 0.008 255);
+    --cm-table-row-hover: oklch(95% 0.008 255);
   }
 }

frontend/src/common/constant/config.ts

@@ -1,43 +1,19 @@
 import {
     AppConfig,
-    AppearanceConfig,
-    EditingConfig,
-    GeneralConfig,
+    AuthMethod,
     LanguageType,
     SystemThemeType,
     TabType,
-    UpdatesConfig,
-    UpdateSourceType,
-    GitBackupConfig,
-    AuthMethod
+    UpdateSourceType
 } from '@/../bindings/voidraft/internal/models/models';
 import {FONT_OPTIONS} from './fonts';
 
-// 配置键映射和限制的类型定义
-export type GeneralConfigKeyMap = {
-    readonly [K in keyof GeneralConfig]: string;
-};
-
-export type EditingConfigKeyMap = {
-    readonly [K in keyof EditingConfig]: string;
-};
-
-export type AppearanceConfigKeyMap = {
-    readonly [K in keyof AppearanceConfig]: string;
-};
-
-export type UpdatesConfigKeyMap = {
-    readonly [K in keyof UpdatesConfig]: string;
-};
-
-export type BackupConfigKeyMap = {
-    readonly [K in keyof GitBackupConfig]: string;
-};
-
 export type NumberConfigKey = 'fontSize' | 'tabSize' | 'lineHeight';
+export type ConfigSection = 'general' | 'editing' | 'appearance' | 'updates' | 'backup';
 
-// 配置键映射
-export const GENERAL_CONFIG_KEY_MAP: GeneralConfigKeyMap = {
+// 统一配置键映射（平级展开）
+export const CONFIG_KEY_MAP = {
+    // general
     alwaysOnTop: 'general.alwaysOnTop',
     dataPath: 'general.dataPath',
     enableSystemTray: 'general.enableSystemTray',
@@ -47,9 +23,7 @@ export const GENERAL_CONFIG_KEY_MAP: GeneralConfigKeyMap = {
     enableWindowSnap: 'general.enableWindowSnap',
     enableLoadingAnimation: 'general.enableLoadingAnimation',
     enableTabs: 'general.enableTabs',
-} as const;
-
-export const EDITING_CONFIG_KEY_MAP: EditingConfigKeyMap = {
+    // editing
     fontSize: 'editing.fontSize',
     fontFamily: 'editing.fontFamily',
     fontWeight: 'editing.fontWeight',
@@ -57,16 +31,12 @@ export const EDITING_CONFIG_KEY_MAP: EditingConfigKeyMap = {
     enableTabIndent: 'editing.enableTabIndent',
     tabSize: 'editing.tabSize',
     tabType: 'editing.tabType',
-    autoSaveDelay: 'editing.autoSaveDelay'
-} as const;
-
-export const APPEARANCE_CONFIG_KEY_MAP: AppearanceConfigKeyMap = {
+    autoSaveDelay: 'editing.autoSaveDelay',
+    // appearance
     language: 'appearance.language',
     systemTheme: 'appearance.systemTheme',
-    currentTheme: 'appearance.currentTheme'
-} as const;
-
-export const UPDATES_CONFIG_KEY_MAP: UpdatesConfigKeyMap = {
+    currentTheme: 'appearance.currentTheme',
+    // updates
     version: 'updates.version',
     autoUpdate: 'updates.autoUpdate',
     primarySource: 'updates.primarySource',
@@ -74,10 +44,8 @@ export const UPDATES_CONFIG_KEY_MAP: UpdatesConfigKeyMap = {
     backupBeforeUpdate: 'updates.backupBeforeUpdate',
     updateTimeout: 'updates.updateTimeout',
     github: 'updates.github',
-    gitea: 'updates.gitea'
-} as const;
-
-export const BACKUP_CONFIG_KEY_MAP: BackupConfigKeyMap = {
+    gitea: 'updates.gitea',
+    // backup
     enabled: 'backup.enabled',
     repo_url: 'backup.repo_url',
     auth_method: 'backup.auth_method',
@@ -90,6 +58,8 @@ export const BACKUP_CONFIG_KEY_MAP: BackupConfigKeyMap = {
     auto_backup: 'backup.auto_backup',
 } as const;
 
+export type ConfigKey = keyof typeof CONFIG_KEY_MAP;
+
 // 配置限制
 export const CONFIG_LIMITS = {
     fontSize: {min: 12, max: 28, default: 13},

frontend/src/common/markdown-it/plugins/markdown-it-abbr/index.ts

@@ -1,159 +0,0 @@
-// Enclose abbreviations in <abbr> tags
-//
-import MarkdownIt, {StateBlock, StateCore, Token} from 'markdown-it';
-
-/**
- * 环境接口，包含缩写定义
- */
-interface AbbrEnv {
-    abbreviations?: { [key: string]: string };
-}
-
-/**
- * markdown-it-abbr 插件
- * 用于支持缩写语法
- */
-export default function abbr_plugin(md: MarkdownIt): void {
-    const escapeRE = md.utils.escapeRE;
-    const arrayReplaceAt = md.utils.arrayReplaceAt;
-
-    // ASCII characters in Cc, Sc, Sm, Sk categories we should terminate on;
-    // you can check character classes here:
-    // http://www.unicode.org/Public/UNIDATA/UnicodeData.txt
-    const OTHER_CHARS = ' \r\n$+<=>^`|~';
-
-    const UNICODE_PUNCT_RE = md.utils.lib.ucmicro.P.source;
-    const UNICODE_SPACE_RE = md.utils.lib.ucmicro.Z.source;
-
-    function abbr_def(state: StateBlock, startLine: number, endLine: number, silent: boolean): boolean {
-        let labelEnd: number;
-        let pos = state.bMarks[startLine] + state.tShift[startLine];
-        const max = state.eMarks[startLine];
-
-        if (pos + 2 >= max) { return false; }
-
-        if (state.src.charCodeAt(pos++) !== 0x2A/* * */) { return false; }
-        if (state.src.charCodeAt(pos++) !== 0x5B/* [ */) { return false; }
-
-        const labelStart = pos;
-
-        for (; pos < max; pos++) {
-            const ch = state.src.charCodeAt(pos);
-            if (ch === 0x5B /* [ */) {
-                return false;
-            } else if (ch === 0x5D /* ] */) {
-                labelEnd = pos;
-                break;
-            } else if (ch === 0x5C /* \ */) {
-                pos++;
-            }
-        }
-
-        if (labelEnd! < 0 || state.src.charCodeAt(labelEnd! + 1) !== 0x3A/* : */) {
-            return false;
-        }
-
-        if (silent) { return true; }
-
-        const label = state.src.slice(labelStart, labelEnd!).replace(/\\(.)/g, '$1');
-        const title = state.src.slice(labelEnd! + 2, max).trim();
-        if (label.length === 0) { return false; }
-        if (title.length === 0) { return false; }
-        
-        const env = state.env as AbbrEnv;
-        if (!env.abbreviations) { env.abbreviations = {}; }
-        // prepend ':' to avoid conflict with Object.prototype members
-        if (typeof env.abbreviations[':' + label] === 'undefined') {
-            env.abbreviations[':' + label] = title;
-        }
-
-        state.line = startLine + 1;
-        return true;
-    }
-
-    function abbr_replace(state: StateCore): void {
-        const blockTokens = state.tokens;
-
-        const env = state.env as AbbrEnv;
-        if (!env.abbreviations) { return; }
-
-        const regSimple = new RegExp('(?:' +
-            Object.keys(env.abbreviations).map(function (x: string) {
-                return x.substr(1);
-            }).sort(function (a: string, b: string) {
-                return b.length - a.length;
-            }).map(escapeRE).join('|') +
-            ')');
-
-        const regText = '(^|' + UNICODE_PUNCT_RE + '|' + UNICODE_SPACE_RE +
-            '|[' + OTHER_CHARS.split('').map(escapeRE).join('') + '])' +
-            '(' + Object.keys(env.abbreviations).map(function (x: string) {
-                return x.substr(1);
-            }).sort(function (a: string, b: string) {
-                return b.length - a.length;
-            }).map(escapeRE).join('|') + ')' +
-            '($|' + UNICODE_PUNCT_RE + '|' + UNICODE_SPACE_RE +
-            '|[' + OTHER_CHARS.split('').map(escapeRE).join('') + '])'
-
-        const reg = new RegExp(regText, 'g');
-
-        for (let j = 0, l = blockTokens.length; j < l; j++) {
-            if (blockTokens[j].type !== 'inline') { continue; }
-            let tokens = blockTokens[j].children!;
-
-            // We scan from the end, to keep position when new tags added.
-            for (let i = tokens.length - 1; i >= 0; i--) {
-                const currentToken = tokens[i];
-                if (currentToken.type !== 'text') { continue; }
-
-                let pos = 0;
-                const text = currentToken.content;
-                reg.lastIndex = 0;
-                const nodes: Token[] = [];
-
-                // fast regexp run to determine whether there are any abbreviated words
-                // in the current token
-                if (!regSimple.test(text)) { continue; }
-
-                let m: RegExpExecArray | null;
-
-                while ((m = reg.exec(text))) {
-                    if (m.index > 0 || m[1].length > 0) {
-                        const token = new state.Token('text', '', 0);
-                        token.content = text.slice(pos, m.index + m[1].length);
-                        nodes.push(token);
-                    }
-
-                    const token_o = new state.Token('abbr_open', 'abbr', 1);
-                    token_o.attrs = [['title', env.abbreviations[':' + m[2]]]];
-                    nodes.push(token_o);
-
-                    const token_t = new state.Token('text', '', 0);
-                    token_t.content = m[2];
-                    nodes.push(token_t);
-
-                    const token_c = new state.Token('abbr_close', 'abbr', -1);
-                    nodes.push(token_c);
-
-                    reg.lastIndex -= m[3].length;
-                    pos = reg.lastIndex;
-                }
-
-                if (!nodes.length) { continue; }
-
-                if (pos < text.length) {
-                    const token = new state.Token('text', '', 0);
-                    token.content = text.slice(pos);
-                    nodes.push(token);
-                }
-
-                // replace current node
-                blockTokens[j].children = tokens = arrayReplaceAt(tokens, i, nodes);
-            }
-        }
-    }
-
-    md.block.ruler.before('reference', 'abbr_def', abbr_def, { alt: ['paragraph', 'reference'] });
-
-    md.core.ruler.after('linkify', 'abbr_replace', abbr_replace);
-}

frontend/src/common/markdown-it/plugins/markdown-it-deflist/index.ts

@@ -1,209 +0,0 @@
-// Process definition lists
-//
-import MarkdownIt, { StateBlock, Token } from 'markdown-it';
-
-/**
- * markdown-it-deflist 插件
- * 用于支持定义列表语法
- */
-export default function deflist_plugin(md: MarkdownIt): void {
-    const isSpace = md.utils.isSpace;
-
-    // Search `[:~][\n ]`, returns next pos after marker on success
-    // or -1 on fail.
-    function skipMarker(state: StateBlock, line: number): number {
-        let start = state.bMarks[line] + state.tShift[line];
-        const max = state.eMarks[line];
-
-        if (start >= max) { return -1; }
-
-        // Check bullet
-        const marker = state.src.charCodeAt(start++);
-        if (marker !== 0x7E/* ~ */ && marker !== 0x3A/* : */) { return -1; }
-
-        const pos = state.skipSpaces(start);
-
-        // require space after ":"
-        if (start === pos) { return -1; }
-
-        // no empty definitions, e.g. "  : "
-        if (pos >= max) { return -1; }
-
-        return start;
-    }
-
-    function markTightParagraphs(state: StateBlock, idx: number): void {
-        const level = state.level + 2;
-
-        for (let i = idx + 2, l = state.tokens.length - 2; i < l; i++) {
-            if (state.tokens[i].level === level && state.tokens[i].type === 'paragraph_open') {
-                state.tokens[i + 2].hidden = true;
-                state.tokens[i].hidden = true;
-                i += 2;
-            }
-        }
-    }
-
-    function deflist(state: StateBlock, startLine: number, endLine: number, silent: boolean): boolean {
-        if (silent) {
-            // quirk: validation mode validates a dd block only, not a whole deflist
-            if (state.ddIndent < 0) { return false; }
-            return skipMarker(state, startLine) >= 0;
-        }
-
-        let nextLine = startLine + 1;
-        if (nextLine >= endLine) { return false; }
-
-        if (state.isEmpty(nextLine)) {
-            nextLine++;
-            if (nextLine >= endLine) { return false; }
-        }
-
-        if (state.sCount[nextLine] < state.blkIndent) { return false; }
-        let contentStart = skipMarker(state, nextLine);
-        if (contentStart < 0) { return false; }
-
-        // Start list
-        const listTokIdx = state.tokens.length;
-        let tight = true;
-
-        const token_dl_o: Token = state.push('dl_open', 'dl', 1);
-        const listLines: [number, number] = [startLine, 0];
-        token_dl_o.map = listLines;
-
-        //
-        // Iterate list items
-        //
-
-        let dtLine = startLine;
-        let ddLine = nextLine;
-
-        // One definition list can contain multiple DTs,
-        // and one DT can be followed by multiple DDs.
-        //
-        // Thus, there is two loops here, and label is
-        // needed to break out of the second one
-        //
-        /* eslint no-labels:0,block-scoped-var:0 */
-        OUTER:
-            for (;;) {
-                let prevEmptyEnd = false;
-
-                const token_dt_o: Token = state.push('dt_open', 'dt', 1);
-                token_dt_o.map = [dtLine, dtLine];
-
-                const token_i: Token = state.push('inline', '', 0);
-                token_i.map = [dtLine, dtLine];
-                token_i.content = state.getLines(dtLine, dtLine + 1, state.blkIndent, false).trim();
-                token_i.children = [];
-
-                state.push('dt_close', 'dt', -1);
-
-                for (;;) {
-                    const token_dd_o: Token = state.push('dd_open', 'dd', 1);
-                    const itemLines: [number, number] = [nextLine, 0];
-                    token_dd_o.map = itemLines;
-
-                    let pos = contentStart;
-                    const max = state.eMarks[ddLine];
-                    let offset = state.sCount[ddLine] + contentStart - (state.bMarks[ddLine] + state.tShift[ddLine]);
-
-                    while (pos < max) {
-                        const ch = state.src.charCodeAt(pos);
-
-                        if (isSpace(ch)) {
-                            if (ch === 0x09) {
-                                offset += 4 - offset % 4;
-                            } else {
-                                offset++;
-                            }
-                        } else {
-                            break;
-                        }
-
-                        pos++;
-                    }
-
-                    contentStart = pos;
-
-                    const oldTight = state.tight;
-                    const oldDDIndent = state.ddIndent;
-                    const oldIndent = state.blkIndent;
-                    const oldTShift = state.tShift[ddLine];
-                    const oldSCount = state.sCount[ddLine];
-                    const oldParentType = state.parentType;
-                    state.blkIndent = state.ddIndent = state.sCount[ddLine] + 2;
-                    state.tShift[ddLine] = contentStart - state.bMarks[ddLine];
-                    state.sCount[ddLine] = offset;
-                    state.tight = true;
-                    state.parentType = 'deflist' as any;
-
-                    state.md.block.tokenize(state, ddLine, endLine);
-
-                    // If any of list item is tight, mark list as tight
-                    if (!state.tight || prevEmptyEnd) {
-                        tight = false;
-                    }
-                    // Item become loose if finish with empty line,
-                    // but we should filter last element, because it means list finish
-                    prevEmptyEnd = (state.line - ddLine) > 1 && state.isEmpty(state.line - 1);
-
-                    state.tShift[ddLine] = oldTShift;
-                    state.sCount[ddLine] = oldSCount;
-                    state.tight = oldTight;
-                    state.parentType = oldParentType;
-                    state.blkIndent = oldIndent;
-                    state.ddIndent = oldDDIndent;
-
-                    state.push('dd_close', 'dd', -1);
-
-                    itemLines[1] = nextLine = state.line;
-
-                    if (nextLine >= endLine) { break OUTER; }
-
-                    if (state.sCount[nextLine] < state.blkIndent) { break OUTER; }
-                    contentStart = skipMarker(state, nextLine);
-                    if (contentStart < 0) { break; }
-
-                    ddLine = nextLine;
-
-                    // go to the next loop iteration:
-                    // insert DD tag and repeat checking
-                }
-
-                if (nextLine >= endLine) { break; }
-                dtLine = nextLine;
-
-                if (state.isEmpty(dtLine)) { break; }
-                if (state.sCount[dtLine] < state.blkIndent) { break; }
-
-                ddLine = dtLine + 1;
-                if (ddLine >= endLine) { break; }
-                if (state.isEmpty(ddLine)) { ddLine++; }
-                if (ddLine >= endLine) { break; }
-
-                if (state.sCount[ddLine] < state.blkIndent) { break; }
-                contentStart = skipMarker(state, ddLine);
-                if (contentStart < 0) { break; }
-
-                // go to the next loop iteration:
-                // insert DT and DD tags and repeat checking
-            }
-
-        // Finilize list
-        state.push('dl_close', 'dl', -1);
-
-        listLines[1] = nextLine;
-
-        state.line = nextLine;
-
-        // mark paragraphs tight if needed
-        if (tight) {
-            markTightParagraphs(state, listTokIdx);
-        }
-
-        return true;
-    }
-
-    md.block.ruler.before('paragraph', 'deflist', deflist, { alt: ['paragraph', 'reference', 'blockquote'] });
-}

frontend/src/common/markdown-it/plugins/markdown-it-emojis/index.ts

@@ -1,4 +0,0 @@
-export { default as bare } from './lib/bare';
-export { default as light } from './lib/light';
-export { default as full } from './lib/full';
-

frontend/src/common/markdown-it/plugins/markdown-it-emojis/lib/bare.ts

@@ -1,26 +0,0 @@
-import MarkdownIt from 'markdown-it';
-import emoji_html from './render';
-import emoji_replace from './replace';
-import normalize_opts, { EmojiOptions } from './normalize_opts';
-
-/**
- * Bare emoji 插件（不包含预定义的 emoji 数据）
- */
-export default function emoji_plugin(md: MarkdownIt, options?: Partial<EmojiOptions>): void {
-    const defaults: EmojiOptions = {
-        defs: {},
-        shortcuts: {},
-        enabled: []
-    };
-
-    const opts = normalize_opts(md.utils.assign({}, defaults, options || {}) as EmojiOptions);
-
-    md.renderer.rules.emoji = emoji_html;
-
-    md.core.ruler.after(
-        'linkify',
-        'emoji',
-        emoji_replace(md, opts.defs, opts.shortcuts, opts.scanRE, opts.replaceRE)
-    );
-}
-

frontend/src/common/markdown-it/plugins/markdown-it-emojis/lib/data/light.ts

@@ -1,158 +0,0 @@
-// Generated, don't edit
-import { EmojiDefs } from '../normalize_opts';
-
-const emojies: EmojiDefs = {
-    "grinning": "😀",
-    "smiley": "😃",
-    "smile": "😄",
-    "grin": "😁",
-    "laughing": "😆",
-    "satisfied": "😆",
-    "sweat_smile": "😅",
-    "joy": "😂",
-    "wink": "😉",
-    "blush": "😊",
-    "innocent": "😇",
-    "heart_eyes": "😍",
-    "kissing_heart": "😘",
-    "kissing": "😗",
-    "kissing_closed_eyes": "😚",
-    "kissing_smiling_eyes": "😙",
-    "yum": "😋",
-    "stuck_out_tongue": "😛",
-    "stuck_out_tongue_winking_eye": "😜",
-    "stuck_out_tongue_closed_eyes": "😝",
-    "neutral_face": "😐",
-    "expressionless": "😑",
-    "no_mouth": "😶",
-    "smirk": "😏",
-    "unamused": "😒",
-    "relieved": "😌",
-    "pensive": "😔",
-    "sleepy": "😪",
-    "sleeping": "😴",
-    "mask": "😷",
-    "dizzy_face": "😵",
-    "sunglasses": "😎",
-    "confused": "😕",
-    "worried": "😟",
-    "open_mouth": "😮",
-    "hushed": "😯",
-    "astonished": "😲",
-    "flushed": "😳",
-    "frowning": "😦",
-    "anguished": "😧",
-    "fearful": "😨",
-    "cold_sweat": "😰",
-    "disappointed_relieved": "😥",
-    "cry": "😢",
-    "sob": "😭",
-    "scream": "😱",
-    "confounded": "😖",
-    "persevere": "😣",
-    "disappointed": "😞",
-    "sweat": "😓",
-    "weary": "😩",
-    "tired_face": "😫",
-    "rage": "😡",
-    "pout": "😡",
-    "angry": "😠",
-    "smiling_imp": "😈",
-    "smiley_cat": "😺",
-    "smile_cat": "😸",
-    "joy_cat": "😹",
-    "heart_eyes_cat": "😻",
-    "smirk_cat": "😼",
-    "kissing_cat": "😽",
-    "scream_cat": "🙀",
-    "crying_cat_face": "😿",
-    "pouting_cat": "😾",
-    "heart": "❤️",
-    "hand": "✋",
-    "raised_hand": "✋",
-    "v": "✌️",
-    "point_up": "☝️",
-    "fist_raised": "✊",
-    "fist": "✊",
-    "monkey_face": "🐵",
-    "cat": "🐱",
-    "cow": "🐮",
-    "mouse": "🐭",
-    "coffee": "☕",
-    "hotsprings": "♨️",
-    "anchor": "⚓",
-    "airplane": "✈️",
-    "hourglass": "⌛",
-    "watch": "⌚",
-    "sunny": "☀️",
-    "star": "⭐",
-    "cloud": "☁️",
-    "umbrella": "☔",
-    "zap": "⚡",
-    "snowflake": "❄️",
-    "sparkles": "✨",
-    "black_joker": "🃏",
-    "mahjong": "🀄",
-    "phone": "☎️",
-    "telephone": "☎️",
-    "envelope": "✉️",
-    "pencil2": "✏️",
-    "black_nib": "✒️",
-    "scissors": "✂️",
-    "wheelchair": "♿",
-    "warning": "⚠️",
-    "aries": "♈",
-    "taurus": "♉",
-    "gemini": "♊",
-    "cancer": "♋",
-    "leo": "♌",
-    "virgo": "♍",
-    "libra": "♎",
-    "scorpius": "♏",
-    "sagittarius": "♐",
-    "capricorn": "♑",
-    "aquarius": "♒",
-    "pisces": "♓",
-    "heavy_multiplication_x": "✖️",
-    "heavy_plus_sign": "➕",
-    "heavy_minus_sign": "➖",
-    "heavy_division_sign": "➗",
-    "bangbang": "‼️",
-    "interrobang": "⁉️",
-    "question": "❓",
-    "grey_question": "❔",
-    "grey_exclamation": "❕",
-    "exclamation": "❗",
-    "heavy_exclamation_mark": "❗",
-    "wavy_dash": "〰️",
-    "recycle": "♻️",
-    "white_check_mark": "✅",
-    "ballot_box_with_check": "☑️",
-    "heavy_check_mark": "✔️",
-    "x": "❌",
-    "negative_squared_cross_mark": "❎",
-    "curly_loop": "➰",
-    "loop": "➿",
-    "part_alternation_mark": "〽️",
-    "eight_spoked_asterisk": "✳️",
-    "eight_pointed_black_star": "✴️",
-    "sparkle": "❇️",
-    "copyright": "©️",
-    "registered": "®️",
-    "tm": "™️",
-    "information_source": "ℹ️",
-    "m": "Ⓜ️",
-    "black_circle": "⚫",
-    "white_circle": "⚪",
-    "black_large_square": "⬛",
-    "white_large_square": "⬜",
-    "black_medium_square": "◼️",
-    "white_medium_square": "◻️",
-    "black_medium_small_square": "◾",
-    "white_medium_small_square": "◽",
-    "black_small_square": "▪️",
-    "white_small_square": "▫️"
-};
-
-export default emojies;
-

frontend/src/common/markdown-it/plugins/markdown-it-emojis/lib/data/shortcuts.ts

@@ -1,45 +0,0 @@
-// Emoticons -> Emoji mapping.
-//
-// (!) Some patterns skipped, to avoid collisions
-// without increase matcher complicity. Than can change in future.
-//
-// Places to look for more emoticons info:
-//
-// - http://en.wikipedia.org/wiki/List_of_emoticons#Western
-// - https://github.com/wooorm/emoticon/blob/master/Support.md
-// - http://factoryjoe.com/projects/emoticons/
-//
-
-import { EmojiShortcuts } from '../normalize_opts';
-
-const shortcuts: EmojiShortcuts = {
-    angry:            ['>:(', '>:-('],
-    blush:            [':")', ':-")'],
-    broken_heart:     ['</3', '<\\3'],
-    // :\ and :-\ not used because of conflict with markdown escaping
-    confused:         [':/', ':-/'], // twemoji shows question
-    cry:              [":'(", ":'-(", ':,(', ':,-('],
-    frowning:         [':(', ':-('],
-    heart:            ['<3'],
-    imp:              [']:(', ']:-('],
-    innocent:         ['o:)', 'O:)', 'o:-)', 'O:-)', '0:)', '0:-)'],
-    joy:              [":')", ":'-)", ':,)', ':,-)', ":'D", ":'-D", ':,D', ':,-D'],
-    kissing:          [':*', ':-*'],
-    laughing:         ['x-)', 'X-)'],
-    neutral_face:     [':|', ':-|'],
-    open_mouth:       [':o', ':-o', ':O', ':-O'],
-    rage:             [':@', ':-@'],
-    smile:            [':D', ':-D'],
-    smiley:           [':)', ':-)'],
-    smiling_imp:      [']:)', ']:-)'],
-    sob:              [":,'(", ":,'-(", ';(', ';-('],
-    stuck_out_tongue: [':P', ':-P'],
-    sunglasses:       ['8-)', 'B-)'],
-    sweat:            [',:(', ',:-('],
-    sweat_smile:      [',:)', ',:-)'],
-    unamused:         [':s', ':-S', ':z', ':-Z', ':$', ':-$'],
-    wink:             [';)', ';-)']
-};
-
-export default shortcuts;
-

frontend/src/common/markdown-it/plugins/markdown-it-emojis/lib/full.ts

@@ -1,21 +0,0 @@
-import MarkdownIt from 'markdown-it';
-import emojies_defs from './data/full';
-import emojies_shortcuts from './data/shortcuts';
-import bare_emoji_plugin from './bare';
-import { EmojiOptions } from './normalize_opts';
-
-/**
- * Full emoji 插件（包含完整的 emoji 数据）
- */
-export default function emoji_plugin(md: MarkdownIt, options?: Partial<EmojiOptions>): void {
-    const defaults: EmojiOptions = {
-        defs: emojies_defs,
-        shortcuts: emojies_shortcuts,
-        enabled: []
-    };
-
-    const opts = md.utils.assign({}, defaults, options || {}) as EmojiOptions;
-
-    bare_emoji_plugin(md, opts);
-}
-

frontend/src/common/markdown-it/plugins/markdown-it-emojis/lib/light.ts

@@ -1,21 +0,0 @@
-import MarkdownIt from 'markdown-it';
-import emojies_defs from './data/light';
-import emojies_shortcuts from './data/shortcuts';
-import bare_emoji_plugin from './bare';
-import { EmojiOptions } from './normalize_opts';
-
-/**
- * Light emoji 插件（包含常用的 emoji 数据）
- */
-export default function emoji_plugin(md: MarkdownIt, options?: Partial<EmojiOptions>): void {
-    const defaults: EmojiOptions = {
-        defs: emojies_defs,
-        shortcuts: emojies_shortcuts,
-        enabled: []
-    };
-
-    const opts = md.utils.assign({}, defaults, options || {}) as EmojiOptions;
-
-    bare_emoji_plugin(md, opts);
-}
-

frontend/src/common/markdown-it/plugins/markdown-it-emojis/lib/normalize_opts.ts

@@ -1,95 +0,0 @@
-/**
- * Emoji 定义类型
- */
-export interface EmojiDefs {
-    [key: string]: string;
-}
-
-/**
- * Emoji 快捷方式类型
- */
-export interface EmojiShortcuts {
-    [key: string]: string | string[];
-}
-
-/**
- * 输入选项接口
- */
-export interface EmojiOptions {
-    defs: EmojiDefs;
-    shortcuts: EmojiShortcuts;
-    enabled: string[];
-}
-
-/**
- * 标准化后的选项接口
- */
-export interface NormalizedEmojiOptions {
-    defs: EmojiDefs;
-    shortcuts: { [key: string]: string };
-    scanRE: RegExp;
-    replaceRE: RegExp;
-}
-
-/**
- * 转义正则表达式特殊字符
- */
-function quoteRE(str: string): string {
-    return str.replace(/[.?*+^$[\]\\(){}|-]/g, '\\$&');
-}
-
-/**
- * 将输入选项转换为更可用的格式并编译搜索正则表达式
- */
-export default function normalize_opts(options: EmojiOptions): NormalizedEmojiOptions {
-    let emojies = options.defs;
-
-    // Filter emojies by whitelist, if needed
-    if (options.enabled.length) {
-        emojies = Object.keys(emojies).reduce((acc: EmojiDefs, key: string) => {
-            if (options.enabled.indexOf(key) >= 0) acc[key] = emojies[key];
-            return acc;
-        }, {});
-    }
-
-    // Flatten shortcuts to simple object: { alias: emoji_name }
-    const shortcuts = Object.keys(options.shortcuts).reduce((acc: { [key: string]: string }, key: string) => {
-        // Skip aliases for filtered emojies, to reduce regexp
-        if (!emojies[key]) return acc;
-
-        if (Array.isArray(options.shortcuts[key])) {
-            (options.shortcuts[key] as string[]).forEach((alias: string) => { acc[alias] = key; });
-            return acc;
-        }
-
-        acc[options.shortcuts[key] as string] = key;
-        return acc;
-    }, {});
-
-    const keys = Object.keys(emojies);
-    let names: string;
-
-    // If no definitions are given, return empty regex to avoid replacements with 'undefined'.
-    if (keys.length === 0) {
-        names = '^$';
-    } else {
-        // Compile regexp
-        names = keys
-            .map((name: string) => { return `:${name}:`; })
-            .concat(Object.keys(shortcuts))
-            .sort()
-            .reverse()
-            .map((name: string) => { return quoteRE(name); })
-            .join('|');
-    }
-    const scanRE = RegExp(names);
-    const replaceRE = RegExp(names, 'g');
-
-    return {
-        defs: emojies,
-        shortcuts,
-        scanRE,
-        replaceRE
-    };
-}
-

frontend/src/common/markdown-it/plugins/markdown-it-emojis/lib/render.ts

@@ -1,9 +0,0 @@
-import { Token } from 'markdown-it';
-
-/**
- * Emoji 渲染函数
- */
-export default function emoji_html(tokens: Token[], idx: number): string {
-    return tokens[idx].content;
-}
-

frontend/src/common/markdown-it/plugins/markdown-it-emojis/lib/replace.ts

@@ -1,97 +0,0 @@
-import MarkdownIt, { StateCore, Token } from 'markdown-it';
-import { EmojiDefs } from './normalize_opts';
-
-/**
- * Emoji 和快捷方式替换逻辑
- * 
- * 注意：理论上，在内联链中解析 :smile: 并只留下快捷方式会更快。
- * 但是，谁在乎呢...
- */
-export default function create_rule(
-    md: MarkdownIt,
-    emojies: EmojiDefs,
-    shortcuts: { [key: string]: string },
-    scanRE: RegExp,
-    replaceRE: RegExp
-) {
-    const arrayReplaceAt = md.utils.arrayReplaceAt;
-    const ucm = md.utils.lib.ucmicro;
-    const has = md.utils.has;
-    const ZPCc = new RegExp([ucm.Z.source, ucm.P.source, ucm.Cc.source].join('|'));
-
-    function splitTextToken(text: string, level: number, TokenConstructor: any): Token[] {
-        let last_pos = 0;
-        const nodes: Token[] = [];
-
-        text.replace(replaceRE, function (match: string, offset: number, src: string): string {
-            let emoji_name: string;
-            // Validate emoji name
-            if (has(shortcuts, match)) {
-                // replace shortcut with full name
-                emoji_name = shortcuts[match];
-
-                // Don't allow letters before any shortcut (as in no ":/" in http://)
-                if (offset > 0 && !ZPCc.test(src[offset - 1])) return '';
-
-                // Don't allow letters after any shortcut
-                if (offset + match.length < src.length && !ZPCc.test(src[offset + match.length])) {
-                    return '';
-                }
-            } else {
-                emoji_name = match.slice(1, -1);
-            }
-
-            // Add new tokens to pending list
-            if (offset > last_pos) {
-                const token = new TokenConstructor('text', '', 0);
-                token.content = text.slice(last_pos, offset);
-                nodes.push(token);
-            }
-
-            const token = new TokenConstructor('emoji', '', 0);
-            token.markup = emoji_name;
-            token.content = emojies[emoji_name];
-            nodes.push(token);
-
-            last_pos = offset + match.length;
-            return '';
-        });
-
-        if (last_pos < text.length) {
-            const token = new TokenConstructor('text', '', 0);
-            token.content = text.slice(last_pos);
-            nodes.push(token);
-        }
-
-        return nodes;
-    }
-
-    return function emoji_replace(state: StateCore): void {
-        let token: Token;
-        const blockTokens = state.tokens;
-        let autolinkLevel = 0;
-
-        for (let j = 0, l = blockTokens.length; j < l; j++) {
-            if (blockTokens[j].type !== 'inline') { continue; }
-            let tokens = blockTokens[j].children!;
-
-            // We scan from the end, to keep position when new tags added.
-            // Use reversed logic in links start/end match
-            for (let i = tokens.length - 1; i >= 0; i--) {
-                token = tokens[i];
-
-                if (token.type === 'link_open' || token.type === 'link_close') {
-                    if (token.info === 'auto') { autolinkLevel -= token.nesting; }
-                }
-
-                if (token.type === 'text' && autolinkLevel === 0 && scanRE.test(token.content)) {
-                    // replace current node
-                    blockTokens[j].children = tokens = arrayReplaceAt(
-                        tokens, i, splitTextToken(token.content, token.level, state.Token)
-                    );
-                }
-            }
-        }
-    };
-}
-

frontend/src/common/markdown-it/plugins/markdown-it-footnote/index.ts

@@ -1,390 +0,0 @@
-import MarkdownIt, {Renderer, StateBlock, StateCore, StateInline, Token} from 'markdown-it';
-
-/**
- * 脚注元数据接口
- */
-interface FootnoteMeta {
-    id: number;
-    subId: number;
-    label: string;
-}
-
-/**
- * 脚注列表项接口
- */
-interface FootnoteItem {
-    label?: string;
-    content?: string;
-    tokens?: Token[];
-    count: number;
-}
-
-/**
- * 环境接口
- */
-interface FootnoteEnv {
-    footnotes?: {
-        refs?: { [key: string]: number };
-        list?: FootnoteItem[];
-    };
-    docId?: string;
-}
-
-/// /////////////////////////////////////////////////////////////////////////////
-// Renderer partials
-
-function render_footnote_anchor_name(tokens: Token[], idx: number, options: any, env: FootnoteEnv): string {
-    const n = Number(tokens[idx].meta.id + 1).toString();
-    let prefix = '';
-
-    if (typeof env.docId === 'string') prefix = `-${env.docId}-`;
-
-    return prefix + n;
-}
-
-function render_footnote_caption(tokens: Token[], idx: number): string {
-    let n = Number(tokens[idx].meta.id + 1).toString();
-
-    if (tokens[idx].meta.subId > 0) n += `:${tokens[idx].meta.subId}`;
-
-    return `[${n}]`;
-}
-
-function render_footnote_ref(tokens: Token[], idx: number, options: any, env: FootnoteEnv, slf: Renderer): string {
-    const id = slf.rules.footnote_anchor_name!(tokens, idx, options, env, slf);
-    const caption = slf.rules.footnote_caption!(tokens, idx, options, env, slf);
-    let refid = id;
-
-    if (tokens[idx].meta.subId > 0) refid += `:${tokens[idx].meta.subId}`;
-
-    return `<sup class="footnote-ref"><a href="#fn${id}" id="fnref${refid}">${caption}</a></sup>`;
-}
-
-function render_footnote_block_open(tokens: Token[], idx: number, options: any): string {
-    return (options.xhtmlOut ? '<hr class="footnotes-sep" />\n' : '<hr class="footnotes-sep">\n') +
-        '<section class="footnotes">\n' +
-        '<ol class="footnotes-list">\n';
-}
-
-function render_footnote_block_close(): string {
-    return '</ol>\n</section>\n';
-}
-
-function render_footnote_open(tokens: Token[], idx: number, options: any, env: FootnoteEnv, slf: Renderer): string {
-    let id = slf.rules.footnote_anchor_name!(tokens, idx, options, env, slf);
-
-    if (tokens[idx].meta.subId > 0) id += `:${tokens[idx].meta.subId}`;
-
-    return `<li id="fn${id}" class="footnote-item">`;
-}
-
-function render_footnote_close(): string {
-    return '</li>\n';
-}
-
-function render_footnote_anchor(tokens: Token[], idx: number, options: any, env: FootnoteEnv, slf: Renderer): string {
-    let id = slf.rules.footnote_anchor_name!(tokens, idx, options, env, slf);
-
-    if (tokens[idx].meta.subId > 0) id += `:${tokens[idx].meta.subId}`;
-
-    /* ↩ with escape code to prevent display as Apple Emoji on iOS */
-    return ` <a href="#fnref${id}" class="footnote-backref">\u21a9\uFE0E</a>`;
-}
-
-/**
- * markdown-it-footnote 插件
- * 用于支持脚注语法
- */
-export default function footnote_plugin(md: MarkdownIt): void {
-    const parseLinkLabel = md.helpers.parseLinkLabel;
-    const isSpace = md.utils.isSpace;
-
-    md.renderer.rules.footnote_ref = render_footnote_ref;
-    md.renderer.rules.footnote_block_open = render_footnote_block_open;
-    md.renderer.rules.footnote_block_close = render_footnote_block_close;
-    md.renderer.rules.footnote_open = render_footnote_open;
-    md.renderer.rules.footnote_close = render_footnote_close;
-    md.renderer.rules.footnote_anchor = render_footnote_anchor;
-
-    // helpers (only used in other rules, no tokens are attached to those)
-    md.renderer.rules.footnote_caption = render_footnote_caption;
-    md.renderer.rules.footnote_anchor_name = render_footnote_anchor_name;
-
-    // Process footnote block definition
-    function footnote_def(state: StateBlock, startLine: number, endLine: number, silent: boolean): boolean {
-        const start = state.bMarks[startLine] + state.tShift[startLine];
-        const max = state.eMarks[startLine];
-
-        // line should be at least 5 chars - "[^x]:"
-        if (start + 4 > max) return false;
-
-        if (state.src.charCodeAt(start) !== 0x5B/* [ */) return false;
-        if (state.src.charCodeAt(start + 1) !== 0x5E/* ^ */) return false;
-
-        let pos: number;
-
-        for (pos = start + 2; pos < max; pos++) {
-            if (state.src.charCodeAt(pos) === 0x20) return false;
-            if (state.src.charCodeAt(pos) === 0x5D /* ] */) {
-                break;
-            }
-        }
-
-        if (pos === start + 2) return false; // no empty footnote labels
-        if (pos + 1 >= max || state.src.charCodeAt(++pos) !== 0x3A /* : */) return false;
-        if (silent) return true;
-        pos++;
-
-        const env = state.env as FootnoteEnv;
-        if (!env.footnotes) env.footnotes = {};
-        if (!env.footnotes.refs) env.footnotes.refs = {};
-        const label = state.src.slice(start + 2, pos - 2);
-        env.footnotes.refs[`:${label}`] = -1;
-
-        const token_fref_o = new state.Token('footnote_reference_open', '', 1);
-        token_fref_o.meta = { label };
-        token_fref_o.level = state.level++;
-        state.tokens.push(token_fref_o);
-
-        const oldBMark = state.bMarks[startLine];
-        const oldTShift = state.tShift[startLine];
-        const oldSCount = state.sCount[startLine];
-        const oldParentType = state.parentType;
-
-        const posAfterColon = pos;
-        const initial = state.sCount[startLine] + pos - (state.bMarks[startLine] + state.tShift[startLine]);
-        let offset = initial;
-
-        while (pos < max) {
-            const ch = state.src.charCodeAt(pos);
-
-            if (isSpace(ch)) {
-                if (ch === 0x09) {
-                    offset += 4 - offset % 4;
-                } else {
-                    offset++;
-                }
-            } else {
-                break;
-            }
-
-            pos++;
-        }
-
-        state.tShift[startLine] = pos - posAfterColon;
-        state.sCount[startLine] = offset - initial;
-
-        state.bMarks[startLine] = posAfterColon;
-        state.blkIndent += 4;
-        state.parentType = 'footnote' as any;
-
-        if (state.sCount[startLine] < state.blkIndent) {
-            state.sCount[startLine] += state.blkIndent;
-        }
-
-        state.md.block.tokenize(state, startLine, endLine);
-
-        state.parentType = oldParentType;
-        state.blkIndent -= 4;
-        state.tShift[startLine] = oldTShift;
-        state.sCount[startLine] = oldSCount;
-        state.bMarks[startLine] = oldBMark;
-
-        const token_fref_c = new state.Token('footnote_reference_close', '', -1);
-        token_fref_c.level = --state.level;
-        state.tokens.push(token_fref_c);
-
-        return true;
-    }
-
-    // Process inline footnotes (^[...])
-    function footnote_inline(state: StateInline, silent: boolean): boolean {
-        const max = state.posMax;
-        const start = state.pos;
-
-        if (start + 2 >= max) return false;
-        if (state.src.charCodeAt(start) !== 0x5E/* ^ */) return false;
-        if (state.src.charCodeAt(start + 1) !== 0x5B/* [ */) return false;
-
-        const labelStart = start + 2;
-        const labelEnd = parseLinkLabel(state, start + 1);
-
-        // parser failed to find ']', so it's not a valid note
-        if (labelEnd < 0) return false;
-
-        // We found the end of the link, and know for a fact it's a valid link;
-        // so all that's left to do is to call tokenizer.
-        //
-        if (!silent) {
-            const env = state.env as FootnoteEnv;
-            if (!env.footnotes) env.footnotes = {};
-            if (!env.footnotes.list) env.footnotes.list = [];
-            const footnoteId = env.footnotes.list.length;
-            const tokens: Token[] = [];
-
-            state.md.inline.parse(
-                state.src.slice(labelStart, labelEnd),
-                state.md,
-                state.env,
-                tokens
-            );
-
-            const token = state.push('footnote_ref', '', 0);
-            token.meta = { id: footnoteId };
-
-            env.footnotes.list[footnoteId] = {
-                content: state.src.slice(labelStart, labelEnd),
-                tokens,
-                count: 0
-            };
-        }
-
-        state.pos = labelEnd + 1;
-        state.posMax = max;
-        return true;
-    }
-
-    // Process footnote references ([^...])
-    function footnote_ref(state: StateInline, silent: boolean): boolean {
-        const max = state.posMax;
-        const start = state.pos;
-
-        // should be at least 4 chars - "[^x]"
-        if (start + 3 > max) return false;
-
-        const env = state.env as FootnoteEnv;
-        if (!env.footnotes || !env.footnotes.refs) return false;
-        if (state.src.charCodeAt(start) !== 0x5B/* [ */) return false;
-        if (state.src.charCodeAt(start + 1) !== 0x5E/* ^ */) return false;
-
-        let pos: number;
-
-        for (pos = start + 2; pos < max; pos++) {
-            if (state.src.charCodeAt(pos) === 0x20) return false;
-            if (state.src.charCodeAt(pos) === 0x0A) return false;
-            if (state.src.charCodeAt(pos) === 0x5D /* ] */) {
-                break;
-            }
-        }
-
-        if (pos === start + 2) return false; // no empty footnote labels
-        if (pos >= max) return false;
-        pos++;
-
-        const label = state.src.slice(start + 2, pos - 1);
-        if (typeof env.footnotes.refs[`:${label}`] === 'undefined') return false;
-
-        if (!silent) {
-            if (!env.footnotes.list) env.footnotes.list = [];
-
-            let footnoteId: number;
-
-            if (env.footnotes.refs[`:${label}`] < 0) {
-                footnoteId = env.footnotes.list.length;
-                env.footnotes.list[footnoteId] = { label, count: 0 };
-                env.footnotes.refs[`:${label}`] = footnoteId;
-            } else {
-                footnoteId = env.footnotes.refs[`:${label}`];
-            }
-
-            const footnoteSubId = env.footnotes.list[footnoteId].count;
-            env.footnotes.list[footnoteId].count++;
-
-            const token = state.push('footnote_ref', '', 0);
-            token.meta = { id: footnoteId, subId: footnoteSubId, label };
-        }
-
-        state.pos = pos;
-        state.posMax = max;
-        return true;
-    }
-
-    // Glue footnote tokens to end of token stream
-    function footnote_tail(state: StateCore): void {
-        let tokens: Token[] | null = null;
-        let current: Token[];
-        let currentLabel: string;
-        let insideRef = false;
-        const refTokens: { [key: string]: Token[] } = {};
-
-        const env = state.env as FootnoteEnv;
-        if (!env.footnotes) { return; }
-
-        state.tokens = state.tokens.filter(function (tok) {
-            if (tok.type === 'footnote_reference_open') {
-                insideRef = true;
-                current = [];
-                currentLabel = tok.meta.label;
-                return false;
-            }
-            if (tok.type === 'footnote_reference_close') {
-                insideRef = false;
-                // prepend ':' to avoid conflict with Object.prototype members
-                refTokens[':' + currentLabel] = current;
-                return false;
-            }
-            if (insideRef) { current.push(tok); }
-            return !insideRef;
-        });
-
-        if (!env.footnotes.list) { return; }
-        const list = env.footnotes.list;
-
-        state.tokens.push(new state.Token('footnote_block_open', '', 1));
-
-        for (let i = 0, l = list.length; i < l; i++) {
-            const token_fo = new state.Token('footnote_open', '', 1);
-            token_fo.meta = { id: i, label: list[i].label };
-            state.tokens.push(token_fo);
-
-            if (list[i].tokens) {
-                tokens = [];
-
-                const token_po = new state.Token('paragraph_open', 'p', 1);
-                token_po.block = true;
-                tokens.push(token_po);
-
-                const token_i = new state.Token('inline', '', 0);
-                token_i.children = list[i].tokens || null;
-                token_i.content = list[i].content || '';
-                tokens.push(token_i);
-
-                const token_pc = new state.Token('paragraph_close', 'p', -1);
-                token_pc.block = true;
-                tokens.push(token_pc);
-            } else if (list[i].label) {
-                tokens = refTokens[`:${list[i].label}`] || null;
-            }
-
-            if (tokens) state.tokens = state.tokens.concat(tokens);
-
-            let lastParagraph: Token | null;
-
-            if (state.tokens[state.tokens.length - 1].type === 'paragraph_close') {
-                lastParagraph = state.tokens.pop()!;
-            } else {
-                lastParagraph = null;
-            }
-
-            const t = list[i].count > 0 ? list[i].count : 1;
-            for (let j = 0; j < t; j++) {
-                const token_a = new state.Token('footnote_anchor', '', 0);
-                token_a.meta = { id: i, subId: j, label: list[i].label };
-                state.tokens.push(token_a);
-            }
-
-            if (lastParagraph) {
-                state.tokens.push(lastParagraph);
-            }
-
-            state.tokens.push(new state.Token('footnote_close', '', -1));
-        }
-
-        state.tokens.push(new state.Token('footnote_block_close', '', -1));
-    }
-
-    md.block.ruler.before('reference', 'footnote_def', footnote_def, { alt: ['paragraph', 'reference'] });
-    md.inline.ruler.after('image', 'footnote_inline', footnote_inline);
-    md.inline.ruler.after('footnote_inline', 'footnote_ref', footnote_ref);
-    md.core.ruler.after('inline', 'footnote_tail', footnote_tail);
-}

frontend/src/common/markdown-it/plugins/markdown-it-ins/index.ts

@@ -1,160 +0,0 @@
-import MarkdownIt, { StateInline, Token } from 'markdown-it';
-
-/**
- * 分隔符接口定义
- */
-interface Delimiter {
-    marker: number;
-    length: number;
-    jump: number;
-    token: number;
-    end: number;
-    open: boolean;
-    close: boolean;
-}
-
-/**
- * 扫描结果接口定义
- */
-interface ScanResult {
-    can_open: boolean;
-    can_close: boolean;
-    length: number;
-}
-
-/**
- * Token 元数据接口定义
- */
-interface TokenMeta {
-    delimiters?: Delimiter[];
-}
-
-/**
- * markdown-it-ins 插件
- * 用于支持插入文本语法 ++text++
- */
-export default function ins_plugin(md: MarkdownIt): void {
-    // Insert each marker as a separate text token, and add it to delimiter list
-    //
-    function tokenize(state: StateInline, silent: boolean): boolean {
-        const start = state.pos;
-        const marker = state.src.charCodeAt(start);
-
-        if (silent) { return false; }
-
-        if (marker !== 0x2B/* + */) { return false; }
-
-        const scanned = state.scanDelims(state.pos, true) as ScanResult;
-        let len = scanned.length;
-        const ch = String.fromCharCode(marker);
-
-        if (len < 2) { return false; }
-
-        if (len % 2) {
-            const token: Token = state.push('text', '', 0);
-            token.content = ch;
-            len--;
-        }
-
-        for (let i = 0; i < len; i += 2) {
-            const token: Token = state.push('text', '', 0);
-            token.content = ch + ch;
-
-            if (!scanned.can_open && !scanned.can_close) { continue; }
-
-            state.delimiters.push({
-                marker,
-                length: 0,     // disable "rule of 3" length checks meant for emphasis
-                jump: i / 2, // 1 delimiter = 2 characters
-                token: state.tokens.length - 1,
-                end: -1,
-                open: scanned.can_open,
-                close: scanned.can_close
-            } as Delimiter);
-        }
-
-        state.pos += scanned.length;
-
-        return true;
-    }
-
-    // Walk through delimiter list and replace text tokens with tags
-    //
-    function postProcess(state: StateInline, delimiters: Delimiter[]): void {
-        let token: Token;
-        const loneMarkers: number[] = [];
-        const max = delimiters.length;
-
-        for (let i = 0; i < max; i++) {
-            const startDelim = delimiters[i];
-
-            if (startDelim.marker !== 0x2B/* + */) {
-                continue;
-            }
-
-            if (startDelim.end === -1) {
-                continue;
-            }
-
-            const endDelim = delimiters[startDelim.end];
-
-            token = state.tokens[startDelim.token];
-            token.type = 'ins_open';
-            token.tag = 'ins';
-            token.nesting = 1;
-            token.markup = '++';
-            token.content = '';
-
-            token = state.tokens[endDelim.token];
-            token.type = 'ins_close';
-            token.tag = 'ins';
-            token.nesting = -1;
-            token.markup = '++';
-            token.content = '';
-
-            if (state.tokens[endDelim.token - 1].type === 'text' &&
-                state.tokens[endDelim.token - 1].content === '+') {
-                loneMarkers.push(endDelim.token - 1);
-            }
-        }
-
-        // If a marker sequence has an odd number of characters, it's splitted
-        // like this: `~~~~~` -> `~` + `~~` + `~~`, leaving one marker at the
-        // start of the sequence.
-        //
-        // So, we have to move all those markers after subsequent s_close tags.
-        //
-        while (loneMarkers.length) {
-            const i = loneMarkers.pop()!;
-            let j = i + 1;
-
-            while (j < state.tokens.length && state.tokens[j].type === 'ins_close') {
-                j++;
-            }
-
-            j--;
-
-            if (i !== j) {
-                token = state.tokens[j];
-                state.tokens[j] = state.tokens[i];
-                state.tokens[i] = token;
-            }
-        }
-    }
-
-    md.inline.ruler.before('emphasis', 'ins', tokenize);
-    md.inline.ruler2.before('emphasis', 'ins', function (state: StateInline): boolean {
-        const tokens_meta = state.tokens_meta as TokenMeta[];
-        const max = (state.tokens_meta || []).length;
-
-        postProcess(state, state.delimiters as Delimiter[]);
-
-        for (let curr = 0; curr < max; curr++) {
-            if (tokens_meta[curr] && tokens_meta[curr].delimiters) {
-                postProcess(state, tokens_meta[curr].delimiters!);
-            }
-        }
-
-        return true;
-    });
-}

frontend/src/common/markdown-it/plugins/markdown-it-mark/index.ts

@@ -1,160 +0,0 @@
-import MarkdownIt, {StateInline, Token} from 'markdown-it';
-
-/**
- * 分隔符接口定义
- */
-interface Delimiter {
-    marker: number;
-    length: number;
-    jump: number;
-    token: number;
-    end: number;
-    open: boolean;
-    close: boolean;
-}
-
-/**
- * 扫描结果接口定义
- */
-interface ScanResult {
-    can_open: boolean;
-    can_close: boolean;
-    length: number;
-}
-
-/**
- * Token 元数据接口定义
- */
-interface TokenMeta {
-    delimiters?: Delimiter[];
-}
-
-/**
- * markdown-it-mark 插件
- * 用于支持 ==标记文本== 语法
- */
-export default function markPlugin(md: MarkdownIt): void {
-    // Insert each marker as a separate text token, and add it to delimiter list
-    //
-    function tokenize(state: StateInline, silent: boolean): boolean {
-        const start = state.pos;
-        const marker = state.src.charCodeAt(start);
-
-        if (silent) { return false; }
-
-        if (marker !== 0x3D/* = */) { return false; }
-
-        const scanned = state.scanDelims(state.pos, true) as ScanResult;
-        let len = scanned.length;
-        const ch = String.fromCharCode(marker);
-
-        if (len < 2) { return false; }
-
-        if (len % 2) {
-            const token: Token = state.push('text', '', 0);
-            token.content = ch;
-            len--;
-        }
-
-        for (let i = 0; i < len; i += 2) {
-            const token: Token = state.push('text', '', 0);
-            token.content = ch + ch;
-
-            if (!scanned.can_open && !scanned.can_close) { continue; }
-
-            state.delimiters.push({
-                marker,
-                length: 0,     // disable "rule of 3" length checks meant for emphasis
-                jump: i / 2, // 1 delimiter = 2 characters
-                token: state.tokens.length - 1,
-                end: -1,
-                open: scanned.can_open,
-                close: scanned.can_close
-            } as Delimiter);
-        }
-
-        state.pos += scanned.length;
-
-        return true;
-    }
-
-    // Walk through delimiter list and replace text tokens with tags
-    //
-    function postProcess(state: StateInline, delimiters: Delimiter[]): void {
-        const loneMarkers: number[] = [];
-        const max = delimiters.length;
-
-        for (let i = 0; i < max; i++) {
-            const startDelim = delimiters[i];
-
-            if (startDelim.marker !== 0x3D/* = */) {
-                continue;
-            }
-
-            if (startDelim.end === -1) {
-                continue;
-            }
-
-            const endDelim = delimiters[startDelim.end];
-
-            const token_o = state.tokens[startDelim.token];
-            token_o.type = 'mark_open';
-            token_o.tag = 'mark';
-            token_o.nesting = 1;
-            token_o.markup = '==';
-            token_o.content = '';
-
-            const token_c = state.tokens[endDelim.token];
-            token_c.type = 'mark_close';
-            token_c.tag = 'mark';
-            token_c.nesting = -1;
-            token_c.markup = '==';
-            token_c.content = '';
-
-            if (state.tokens[endDelim.token - 1].type === 'text' &&
-                state.tokens[endDelim.token - 1].content === '=') {
-                loneMarkers.push(endDelim.token - 1);
-            }
-        }
-
-        // If a marker sequence has an odd number of characters, it's splitted
-        // like this: `~~~~~` -> `~` + `~~` + `~~`, leaving one marker at the
-        // start of the sequence.
-        //
-        // So, we have to move all those markers after subsequent s_close tags.
-        //
-        while (loneMarkers.length) {
-            const i = loneMarkers.pop()!;
-            let j = i + 1;
-
-            while (j < state.tokens.length && state.tokens[j].type === 'mark_close') {
-                j++;
-            }
-
-            j--;
-
-            if (i !== j) {
-                const token = state.tokens[j];
-                state.tokens[j] = state.tokens[i];
-                state.tokens[i] = token;
-            }
-        }
-    }
-
-    md.inline.ruler.before('emphasis', 'mark', tokenize);
-    md.inline.ruler2.before('emphasis', 'mark', function (state: StateInline): boolean {
-        let curr: number;
-        const tokens_meta = state.tokens_meta as TokenMeta[];
-        const max = (state.tokens_meta || []).length;
-
-        postProcess(state, state.delimiters as Delimiter[]);
-
-        for (curr = 0; curr < max; curr++) {
-            if (tokens_meta[curr] && tokens_meta[curr].delimiters) {
-                postProcess(state, tokens_meta[curr].delimiters!);
-            }
-        }
-
-        return true;
-    });
-}

frontend/src/common/markdown-it/plugins/markdown-it-mermaid/index.ts

@@ -1,106 +0,0 @@
-import mermaid from "mermaid";
-import {genUid, hashCode, sleep} from "./utils";
-
-const mermaidCache = new Map<string, HTMLElement>();
-
-// 缓存计数器，用于清除缓存
-const mermaidCacheCount = new Map<string, number>();
-let count = 0;
-
-
-let countTmo = setTimeout(() => undefined, 0);
-const addCount = () => {
-    clearTimeout(countTmo);
-    countTmo = setTimeout(() => {
-        count++;
-        clearCache();
-    }, 500);
-};
-
-const clearCache = () => {
-    for (const key of mermaidCacheCount.keys()) {
-        const value = mermaidCacheCount.get(key)!;
-        if (value + 3 < count) {
-            mermaidCache.delete(key);
-            mermaidCacheCount.delete(key);
-        }
-    }
-};
-
-/**
- * 渲染 mermaid
- * @param code mermaid 代码
- * @param targetId 目标 id
- * @param count 计数器
- */
-const renderMermaid = async (code: string, targetId: string, count: number) => {
-    let limit = 100;
-    while (limit-- > 0) {
-        const container = document.getElementById(targetId);
-        if (!container) {
-            await sleep(100);
-            continue;
-        }
-        try {
-            const {svg} = await mermaid.render("mermaid-svg-" + genUid(), code, container);
-            container.innerHTML = svg;
-            mermaidCache.set(targetId, container);
-            mermaidCacheCount.set(targetId, count);
-        } catch (e) {
-        }
-        break;
-    }
-};
-
-export interface MermaidItOptions {
-    theme?: "default" | "dark" | "forest" | "neutral" | "base";
-}
-
-/**
- * 更新 mermaid 主题
- */
-export const updateMermaidTheme = (theme: "default" | "dark" | "forest" | "neutral" | "base") => {
-    mermaid.initialize({
-        startOnLoad: false,
-        theme: theme
-    });
-    // 清空缓存，强制重新渲染
-    mermaidCache.clear();
-    mermaidCacheCount.clear();
-
-};
-
-/**
- * mermaid 插件
- * @param md markdown-it
- * @param options 配置选项
- * @constructor MermaidIt
- */
-export const MermaidIt = function (md: any, options?: MermaidItOptions): void {
-    const theme = options?.theme || "default";
-    mermaid.initialize({
-        startOnLoad: false,
-        theme: theme
-    });
-    const defaultRenderer = md.renderer.rules.fence.bind(md.renderer.rules);
-    md.renderer.rules.fence = (tokens: any, idx: any, options: any, env: any, self: any) => {
-        addCount();
-        const token = tokens[idx];
-        const info = token.info.trim();
-        if (info === "mermaid") {
-            const containerId = "mermaid-container-" + hashCode(token.content);
-            const container = document.createElement("div");
-            container.id = containerId;
-            if (mermaidCache.has(containerId)) {
-                container.innerHTML = mermaidCache.get(containerId)!.innerHTML;
-                mermaidCacheCount.set(containerId, count);
-            } else {
-                renderMermaid(token.content, containerId, count).then();
-            }
-            return container.outerHTML;
-        }
-        // 使用默认的渲染规则
-        return defaultRenderer(tokens, idx, options, env, self);
-    };
-};
-

frontend/src/common/markdown-it/plugins/markdown-it-mermaid/utils.ts

@@ -1,49 +0,0 @@
-import { v4 as uuidv4 } from "uuid";
-
-/**
- * uuid 生成函数
- * @param split 分隔符
- */
-export const genUid = (split = "") => {
-    return uuidv4().split("-").join(split);
-};
-
-/**
- * 一个简易的sleep函数
- */
-export const sleep = async (ms: number) => {
-    return new Promise((resolve) => {
-        setTimeout(resolve, ms);
-    });
-};
-
-/**
- * 计算字符串的hash值
- * 返回一个数字
- * @param str
- */
-export const hashCode = (str: string) => {
-    let hash = 0;
-    if (str.length === 0) return hash;
-    for (let i = 0; i < str.length; i++) {
-        const char = str.charCodeAt(i);
-        hash = (hash << 5) - hash + char;
-        hash = hash & hash; // Convert to 32bit integer
-    }
-    return hash;
-};
-
-/**
- * 一个简易的阻塞函数
- */
-export const awaitFor = async (cb: () => boolean, timeout = 0, errText = "超时暂停阻塞") => {
-    const start = Date.now();
-    while (true) {
-        if (cb()) return true;
-        if (timeout && Date.now() - start > timeout) {
-            console.error("阻塞超时: " + errText);
-            return false;
-        }
-        await sleep(100);
-    }
-};

frontend/src/common/markdown-it/plugins/markdown-it-sub/index.ts

@@ -1,66 +0,0 @@
-// Process ~subscript~
-
-import MarkdownIt, { StateInline, Token } from 'markdown-it';
-
-// same as UNESCAPE_MD_RE plus a space
-const UNESCAPE_RE = /\\([ \\!"#$%&'()*+,./:;<=>?@[\]^_`{|}~-])/g;
-
-function subscript(state: StateInline, silent: boolean): boolean {
-    const max = state.posMax;
-    const start = state.pos;
-
-    if (state.src.charCodeAt(start) !== 0x7E/* ~ */) { return false; }
-    if (silent) { return false; } // don't run any pairs in validation mode
-    if (start + 2 >= max) { return false; }
-
-    state.pos = start + 1;
-    let found = false;
-
-    while (state.pos < max) {
-        if (state.src.charCodeAt(state.pos) === 0x7E/* ~ */) {
-            found = true;
-            break;
-        }
-
-        state.md.inline.skipToken(state);
-    }
-
-    if (!found || start + 1 === state.pos) {
-        state.pos = start;
-        return false;
-    }
-
-    const content = state.src.slice(start + 1, state.pos);
-
-    // don't allow unescaped spaces/newlines inside
-    if (content.match(/(^|[^\\])(\\\\)*\s/)) {
-        state.pos = start;
-        return false;
-    }
-
-    // found!
-    state.posMax = state.pos;
-    state.pos = start + 1;
-
-    // Earlier we checked !silent, but this implementation does not need it
-    const token_so: Token = state.push('sub_open', 'sub', 1);
-    token_so.markup = '~';
-
-    const token_t: Token = state.push('text', '', 0);
-    token_t.content = content.replace(UNESCAPE_RE, '$1');
-
-    const token_sc: Token = state.push('sub_close', 'sub', -1);
-    token_sc.markup = '~';
-
-    state.pos = state.posMax + 1;
-    state.posMax = max;
-    return true;
-}
-
-/**
- * markdown-it-sub 插件
- * 用于支持下标语法 ~text~
- */
-export default function sub_plugin(md: MarkdownIt): void {
-    md.inline.ruler.after('emphasis', 'sub', subscript);
-}

frontend/src/common/markdown-it/plugins/markdown-it-sup/index.ts

@@ -1,66 +0,0 @@
-// Process ^superscript^
-
-import MarkdownIt, { StateInline, Token } from 'markdown-it';
-
-// same as UNESCAPE_MD_RE plus a space
-const UNESCAPE_RE = /\\([ \\!"#$%&'()*+,./:;<=>?@[\]^_`{|}~-])/g;
-
-function superscript(state: StateInline, silent: boolean): boolean {
-    const max = state.posMax;
-    const start = state.pos;
-
-    if (state.src.charCodeAt(start) !== 0x5E/* ^ */) { return false; }
-    if (silent) { return false; } // don't run any pairs in validation mode
-    if (start + 2 >= max) { return false; }
-
-    state.pos = start + 1;
-    let found = false;
-
-    while (state.pos < max) {
-        if (state.src.charCodeAt(state.pos) === 0x5E/* ^ */) {
-            found = true;
-            break;
-        }
-
-        state.md.inline.skipToken(state);
-    }
-
-    if (!found || start + 1 === state.pos) {
-        state.pos = start;
-        return false;
-    }
-
-    const content = state.src.slice(start + 1, state.pos);
-
-    // don't allow unescaped spaces/newlines inside
-    if (content.match(/(^|[^\\])(\\\\)*\s/)) {
-        state.pos = start;
-        return false;
-    }
-
-    // found!
-    state.posMax = state.pos;
-    state.pos = start + 1;
-
-    // Earlier we checked !silent, but this implementation does not need it
-    const token_so: Token = state.push('sup_open', 'sup', 1);
-    token_so.markup = '^';
-
-    const token_t: Token = state.push('text', '', 0);
-    token_t.content = content.replace(UNESCAPE_RE, '$1');
-
-    const token_sc: Token = state.push('sup_close', 'sup', -1);
-    token_sc.markup = '^';
-
-    state.pos = state.posMax + 1;
-    state.posMax = max;
-    return true;
-}
-
-/**
- * markdown-it-sup 插件
- * 用于支持上标语法 ^text^
- */
-export default function sup_plugin(md: MarkdownIt): void {
-    md.inline.ruler.after('emphasis', 'sup', superscript);
-}

frontend/src/components/toolbar/BlockLanguageSelector.vue

@@ -8,7 +8,7 @@ import { getActiveNoteBlock } from '@/views/editor/extensions/codeblock/state';
 import { changeCurrentBlockLanguage } from '@/views/editor/extensions/codeblock/commands';
 
 const { t } = useI18n();
-const editorStore = readonly(useEditorStore());
+const editorStore = useEditorStore(); 
 
 // 组件状态
 const showLanguageMenu = shallowRef(false);

frontend/src/components/toolbar/Toolbar.vue

@@ -13,20 +13,16 @@ import {getActiveNoteBlock} from '@/views/editor/extensions/codeblock/state';
 import {getLanguage} from '@/views/editor/extensions/codeblock/lang-parser/languages';
 import {formatBlockContent} from '@/views/editor/extensions/codeblock/formatCode';
 import {createDebounce} from '@/common/utils/debounce';
-import {toggleMarkdownPreview} from '@/views/editor/extensions/markdownPreview';
-import {usePanelStore} from '@/stores/panelStore';
 
-const editorStore = readonly(useEditorStore());
-const configStore = readonly(useConfigStore());
-const updateStore = readonly(useUpdateStore());
-const windowStore = readonly(useWindowStore());
-const systemStore = readonly(useSystemStore());
-const panelStore = readonly(usePanelStore());
+const editorStore = useEditorStore();
+const configStore = useConfigStore();
+const updateStore = useUpdateStore();
+const windowStore = useWindowStore();
+const systemStore = useSystemStore();
 const {t} = useI18n();
 const router = useRouter();
 
 const canFormatCurrentBlock = ref(false);
-const canPreviewMarkdown = ref(false);
 const isLoaded = shallowRef(false);
 
 const { documentStats } = toRefs(editorStore);
@@ -37,10 +33,6 @@ const isCurrentWindowOnTop = computed(() => {
   return config.value.general.alwaysOnTop || systemStore.isWindowOnTop;
 });
 
-// 当前文档的预览是否打开
-const isCurrentBlockPreviewing = computed(() => {
-  return panelStore.markdownPreview.isOpen && !panelStore.markdownPreview.isClosing;
-});
 
 // 切换窗口置顶状态
 const toggleAlwaysOnTop = async () => {
@@ -69,22 +61,12 @@ const formatCurrentBlock = () => {
   formatBlockContent(editorStore.editorView);
 };
 
-// 切换 Markdown 预览
-const { debouncedFn: debouncedTogglePreview } = createDebounce(() => {
-  if (!canPreviewMarkdown.value || !editorStore.editorView) return;
-  toggleMarkdownPreview(editorStore.editorView as any);
-}, { delay: 200 });
-
-const togglePreview = () => {
-  debouncedTogglePreview();
-};
 
 // 统一更新按钮状态
 const updateButtonStates = () => {
   const view: any = editorStore.editorView;
   if (!view) {
     canFormatCurrentBlock.value = false;
-    canPreviewMarkdown.value = false;
     return;
   }
 
@@ -95,7 +77,6 @@ const updateButtonStates = () => {
     // 提前返回，减少不必要的计算
     if (!activeBlock) {
       canFormatCurrentBlock.value = false;
-      canPreviewMarkdown.value = false;
       return;
     }
 
@@ -103,11 +84,9 @@ const updateButtonStates = () => {
     const language = getLanguage(languageName as any);
 
     canFormatCurrentBlock.value = Boolean(language?.prettier);
-    canPreviewMarkdown.value = languageName.toLowerCase() === 'md';
   } catch (error) {
     console.warn('Error checking block capabilities:', error);
     canFormatCurrentBlock.value = false;
-    canPreviewMarkdown.value = false;
   }
 };
 
@@ -161,7 +140,6 @@ watch(
           cleanupListeners = setupEditorListeners(newView);
         } else {
           canFormatCurrentBlock.value = false;
-          canPreviewMarkdown.value = false;
         }
       });
     },
@@ -255,21 +233,6 @@ const statsData = computed(() => ({
       <!-- 块语言选择器 -->
       <BlockLanguageSelector/>
 
-      <!-- Markdown预览按钮 -->
-      <div
-          v-if="canPreviewMarkdown"
-          class="preview-button"
-          :class="{ 'active': isCurrentBlockPreviewing }"
-          :title="isCurrentBlockPreviewing ? t('toolbar.closePreview') : t('toolbar.previewMarkdown')"
-          @click="togglePreview"
-      >
-        <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none"
-             stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
-          <path d="M2 12s3-7 10-7 10 7 10 7-3 7-10 7-10-7-10-7Z"/>
-          <circle cx="12" cy="12" r="3"/>
-        </svg>
-      </div>
-
       <!-- 格式化按钮 - 支持点击操作 -->
       <div
           v-if="canFormatCurrentBlock"

frontend/src/stores/configStore.ts

@@ -3,29 +3,23 @@ import {computed, reactive} from 'vue';
 import {ConfigService, StartupService} from '@/../bindings/voidraft/internal/services';
 import {
     AppConfig,
-    AppearanceConfig,
     AuthMethod,
     EditingConfig,
-    GeneralConfig,
-    GitBackupConfig,
     LanguageType,
     SystemThemeType,
-    TabType,
-    UpdatesConfig
+    TabType
 } from '@/../bindings/voidraft/internal/models/models';
 import {useI18n} from 'vue-i18n';
 import {ConfigUtils} from '@/common/utils/configUtils';
 import {FONT_OPTIONS} from '@/common/constant/fonts';
 import {SUPPORTED_LOCALES} from '@/common/constant/locales';
 import {
-    APPEARANCE_CONFIG_KEY_MAP,
-    BACKUP_CONFIG_KEY_MAP,
+    CONFIG_KEY_MAP,
     CONFIG_LIMITS,
+    ConfigKey,
+    ConfigSection,
     DEFAULT_CONFIG,
-    EDITING_CONFIG_KEY_MAP,
-    GENERAL_CONFIG_KEY_MAP,
-    NumberConfigKey,
-    UPDATES_CONFIG_KEY_MAP
+    NumberConfigKey
 } from '@/common/constant/config';
 import * as runtime from '@wailsio/runtime';
 
@@ -42,86 +36,42 @@ export const useConfigStore = defineStore('config', () => {
     // Font options (no longer localized)
     const fontOptions = computed(() => FONT_OPTIONS);
 
-    // 计算属性 - 使用工厂函数简化
+    // 计算属性
     const createLimitComputed = (key: NumberConfigKey) => computed(() => CONFIG_LIMITS[key]);
     const limits = Object.fromEntries(
         (['fontSize', 'tabSize', 'lineHeight'] as const).map(key => [key, createLimitComputed(key)])
     ) as Record<NumberConfigKey, ReturnType<typeof createLimitComputed>>;
 
-    // 通用配置更新方法
-    const updateGeneralConfig = async <K extends keyof GeneralConfig>(key: K, value: GeneralConfig[K]): Promise<void> => {
-        // 确保配置已加载
+    // 统一配置更新方法
+    const updateConfig = async <K extends ConfigKey>(key: K, value: any): Promise<void> => {
         if (!state.configLoaded && !state.isLoading) {
             await initConfig();
         }
 
-        const backendKey = GENERAL_CONFIG_KEY_MAP[key];
+        const backendKey = CONFIG_KEY_MAP[key];
         if (!backendKey) {
-            throw new Error(`No backend key mapping found for general.${key.toString()}`);
+            throw new Error(`No backend key mapping found for ${String(key)}`);
         }
 
+        // 从 backendKey 提取 section（例如 'general.alwaysOnTop' -> 'general'）
+        const section = backendKey.split('.')[0] as ConfigSection;
+
         await ConfigService.Set(backendKey, value);
-        state.config.general[key] = value;
+        (state.config[section] as any)[key] = value;
     };
 
-    const updateEditingConfig = async <K extends keyof EditingConfig>(key: K, value: EditingConfig[K]): Promise<void> => {
-        // 确保配置已加载
-        if (!state.configLoaded && !state.isLoading) {
-            await initConfig();
-        }
-
-        const backendKey = EDITING_CONFIG_KEY_MAP[key];
-        if (!backendKey) {
-            throw new Error(`No backend key mapping found for editing.${key.toString()}`);
-        }
-
-        await ConfigService.Set(backendKey, value);
-        state.config.editing[key] = value;
+    // 只更新本地状态，不保存到后端
+    const updateConfigLocal = <K extends ConfigKey>(key: K, value: any): void => {
+        const backendKey = CONFIG_KEY_MAP[key];
+        const section = backendKey.split('.')[0] as ConfigSection;
+        (state.config[section] as any)[key] = value;
     };
 
-    const updateAppearanceConfig = async <K extends keyof AppearanceConfig>(key: K, value: AppearanceConfig[K]): Promise<void> => {
-        // 确保配置已加载
-        if (!state.configLoaded && !state.isLoading) {
-            await initConfig();
-        }
-
-        const backendKey = APPEARANCE_CONFIG_KEY_MAP[key];
-        if (!backendKey) {
-            throw new Error(`No backend key mapping found for appearance.${key.toString()}`);
-        }
-
-        await ConfigService.Set(backendKey, value);
-        state.config.appearance[key] = value;
-    };
-
-    const updateUpdatesConfig = async <K extends keyof UpdatesConfig>(key: K, value: UpdatesConfig[K]): Promise<void> => {
-        // 确保配置已加载
-        if (!state.configLoaded && !state.isLoading) {
-            await initConfig();
-        }
-
-        const backendKey = UPDATES_CONFIG_KEY_MAP[key];
-        if (!backendKey) {
-            throw new Error(`No backend key mapping found for updates.${key.toString()}`);
-        }
-
-        await ConfigService.Set(backendKey, value);
-        state.config.updates[key] = value;
-    };
-
-    const updateBackupConfig = async <K extends keyof GitBackupConfig>(key: K, value: GitBackupConfig[K]): Promise<void> => {
-        // 确保配置已加载
-        if (!state.configLoaded && !state.isLoading) {
-            await initConfig();
-        }
-
-        const backendKey = BACKUP_CONFIG_KEY_MAP[key];
-        if (!backendKey) {
-            throw new Error(`No backend key mapping found for backup.${key.toString()}`);
-        }
-
-        await ConfigService.Set(backendKey, value);
-        state.config.backup[key] = value;
+    // 保存指定配置到后端
+    const saveConfig = async <K extends ConfigKey>(key: K): Promise<void> => {
+        const backendKey = CONFIG_KEY_MAP[key];
+        const section = backendKey.split('.')[0] as ConfigSection;
+        await ConfigService.Set(backendKey, (state.config[section] as any)[key]);
     };
 
     // 加载配置
@@ -155,22 +105,24 @@ export const useConfigStore = defineStore('config', () => {
         const clamp = (value: number) => ConfigUtils.clamp(value, limit.min, limit.max);
 
         return {
-            increase: async () => await updateEditingConfig(key, clamp(state.config.editing[key] + 1)),
-            decrease: async () => await updateEditingConfig(key, clamp(state.config.editing[key] - 1)),
-            set: async (value: number) => await updateEditingConfig(key, clamp(value)),
-            reset: async () => await updateEditingConfig(key, limit.default)
+            increase: async () => await updateConfig(key, clamp(state.config.editing[key] + 1)),
+            decrease: async () => await updateConfig(key, clamp(state.config.editing[key] - 1)),
+            set: async (value: number) => await updateConfig(key, clamp(value)),
+            reset: async () => await updateConfig(key, limit.default),
+            increaseLocal: () => updateConfigLocal(key, clamp(state.config.editing[key] + 1)),
+            decreaseLocal: () => updateConfigLocal(key, clamp(state.config.editing[key] - 1))
         };
     };
 
     const createEditingToggler = <T extends keyof EditingConfig>(key: T) =>
-        async () => await updateEditingConfig(key, !state.config.editing[key] as EditingConfig[T]);
+        async () => await updateConfig(key as ConfigKey, !state.config.editing[key] as EditingConfig[T]);
 
     // 枚举值切换器
     const createEnumToggler = <T extends TabType>(key: 'tabType', values: readonly T[]) =>
         async () => {
             const currentIndex = values.indexOf(state.config.editing[key] as T);
             const nextIndex = (currentIndex + 1) % values.length;
-            return await updateEditingConfig(key, values[nextIndex]);
+            return await updateConfig(key, values[nextIndex]);
         };
 
     // 重置配置
@@ -192,21 +144,19 @@ export const useConfigStore = defineStore('config', () => {
 
     // 语言设置方法
     const setLanguage = async (language: LanguageType): Promise<void> => {
-        await updateAppearanceConfig('language', language);
-
-        // 同步更新前端语言
+        await updateConfig('language', language);
         const frontendLocale = ConfigUtils.backendLanguageToFrontend(language);
         locale.value = frontendLocale as any;
     };
 
     // 系统主题设置方法
     const setSystemTheme = async (systemTheme: SystemThemeType): Promise<void> => {
-        await updateAppearanceConfig('systemTheme', systemTheme);
+        await updateConfig('systemTheme', systemTheme);
     };
 
     // 当前主题设置方法
     const setCurrentTheme = async (themeName: string): Promise<void> => {
-        await updateAppearanceConfig('currentTheme', themeName);
+        await updateConfig('currentTheme', themeName);
     };
 
 
@@ -238,21 +188,12 @@ export const useConfigStore = defineStore('config', () => {
     const togglers = {
         tabIndent: createEditingToggler('enableTabIndent'),
         alwaysOnTop: async () => {
-            await updateGeneralConfig('alwaysOnTop', !state.config.general.alwaysOnTop);
-            // 立即应用窗口置顶状态
+            await updateConfig('alwaysOnTop', !state.config.general.alwaysOnTop);
             await runtime.Window.SetAlwaysOnTop(state.config.general.alwaysOnTop);
         },
         tabType: createEnumToggler('tabType', CONFIG_LIMITS.tabType.values)
     };
 
-    // 字符串配置设置器
-    const setters = {
-        fontFamily: async (value: string) => await updateEditingConfig('fontFamily', value),
-        fontWeight: async (value: string) => await updateEditingConfig('fontWeight', value),
-        dataPath: async (value: string) => await updateGeneralConfig('dataPath', value),
-        autoSaveDelay: async (value: number) => await updateEditingConfig('autoSaveDelay', value)
-    };
-
     return {
         // 状态
         config: computed(() => state.config),
@@ -281,10 +222,14 @@ export const useConfigStore = defineStore('config', () => {
         decreaseFontSize: adjusters.fontSize.decrease,
         resetFontSize: adjusters.fontSize.reset,
         setFontSize: adjusters.fontSize.set,
+        // 字体大小操作
+        increaseFontSizeLocal: adjusters.fontSize.increaseLocal,
+        decreaseFontSizeLocal: adjusters.fontSize.decreaseLocal,
+        saveFontSize: () => saveConfig('fontSize'),
 
         // Tab操作
         toggleTabIndent: togglers.tabIndent,
-        setEnableTabIndent: (value: boolean) => updateEditingConfig('enableTabIndent', value),
+        setEnableTabIndent: (value: boolean) => updateConfig('enableTabIndent', value),
         ...adjusters.tabSize,
         increaseTabSize: adjusters.tabSize.increase,
         decreaseTabSize: adjusters.tabSize.decrease,
@@ -296,59 +241,53 @@ export const useConfigStore = defineStore('config', () => {
 
         // 窗口操作
         toggleAlwaysOnTop: togglers.alwaysOnTop,
-        setAlwaysOnTop: (value: boolean) => updateGeneralConfig('alwaysOnTop', value),
+        setAlwaysOnTop: (value: boolean) => updateConfig('alwaysOnTop', value),
 
         // 字体操作
-        setFontFamily: setters.fontFamily,
-        setFontWeight: setters.fontWeight,
+        setFontFamily: (value: string) => updateConfig('fontFamily', value),
+        setFontWeight: (value: string) => updateConfig('fontWeight', value),
 
         // 路径操作
-        setDataPath: setters.dataPath,
+        setDataPath: (value: string) => updateConfig('dataPath', value),
 
         // 保存配置相关方法
-        setAutoSaveDelay: setters.autoSaveDelay,
+        setAutoSaveDelay: (value: number) => updateConfig('autoSaveDelay', value),
 
         // 热键配置相关方法
-        setEnableGlobalHotkey: (value: boolean) => updateGeneralConfig('enableGlobalHotkey', value),
-        setGlobalHotkey: (hotkey: any) => updateGeneralConfig('globalHotkey', hotkey),
+        setEnableGlobalHotkey: (value: boolean) => updateConfig('enableGlobalHotkey', value),
+        setGlobalHotkey: (hotkey: any) => updateConfig('globalHotkey', hotkey),
 
         // 系统托盘配置相关方法
-        setEnableSystemTray: (value: boolean) => updateGeneralConfig('enableSystemTray', value),
+        setEnableSystemTray: (value: boolean) => updateConfig('enableSystemTray', value),
 
         // 开机启动配置相关方法
         setStartAtLogin: async (value: boolean) => {
-            // 先更新配置文件
-            await updateGeneralConfig('startAtLogin', value);
-            // 再调用系统设置API
+            await updateConfig('startAtLogin', value);
             await StartupService.SetEnabled(value);
         },
 
         // 窗口吸附配置相关方法
-        setEnableWindowSnap: async (value: boolean) => await updateGeneralConfig('enableWindowSnap', value),
+        setEnableWindowSnap: (value: boolean) => updateConfig('enableWindowSnap', value),
 
         // 加载动画配置相关方法
-        setEnableLoadingAnimation: async (value: boolean) => await updateGeneralConfig('enableLoadingAnimation', value),
+        setEnableLoadingAnimation: (value: boolean) => updateConfig('enableLoadingAnimation', value),
 
         // 标签页配置相关方法
-        setEnableTabs: async (value: boolean) => await updateGeneralConfig('enableTabs', value),
+        setEnableTabs: (value: boolean) => updateConfig('enableTabs', value),
 
         // 更新配置相关方法
-        setAutoUpdate: async (value: boolean) => await updateUpdatesConfig('autoUpdate', value),
+        setAutoUpdate: (value: boolean) => updateConfig('autoUpdate', value),
 
         // 备份配置相关方法
-        setEnableBackup: async (value: boolean) => {
-            await updateBackupConfig('enabled', value);
-        },
-        setAutoBackup: async (value: boolean) => {
-            await updateBackupConfig('auto_backup', value);
-        },
-        setRepoUrl: async (value: string) => await updateBackupConfig('repo_url', value),
-        setAuthMethod: async (value: AuthMethod) => await updateBackupConfig('auth_method', value),
-        setUsername: async (value: string) => await updateBackupConfig('username', value),
-        setPassword: async (value: string) => await updateBackupConfig('password', value),
-        setToken: async (value: string) => await updateBackupConfig('token', value),
-        setSshKeyPath: async (value: string) => await updateBackupConfig('ssh_key_path', value),
-        setSshKeyPassphrase: async (value: string) => await updateBackupConfig('ssh_key_passphrase', value),
-        setBackupInterval: async (value: number) => await updateBackupConfig('backup_interval', value),
+        setEnableBackup: (value: boolean) => updateConfig('enabled', value),
+        setAutoBackup: (value: boolean) => updateConfig('auto_backup', value),
+        setRepoUrl: (value: string) => updateConfig('repo_url', value),
+        setAuthMethod: (value: AuthMethod) => updateConfig('auth_method', value),
+        setUsername: (value: string) => updateConfig('username', value),
+        setPassword: (value: string) => updateConfig('password', value),
+        setToken: (value: string) => updateConfig('token', value),
+        setSshKeyPath: (value: string) => updateConfig('ssh_key_path', value),
+        setSshKeyPassphrase: (value: string) => updateConfig('ssh_key_passphrase', value),
+        setBackupInterval: (value: number) => updateConfig('backup_interval', value),
     };
 });

frontend/src/stores/editorStore.ts

@@ -4,7 +4,6 @@ import {EditorView} from '@codemirror/view';
 import {EditorState, Extension} from '@codemirror/state';
 import {useConfigStore} from './configStore';
 import {useDocumentStore} from './documentStore';
-import {usePanelStore} from './panelStore';
 import {ExtensionID} from '@/../bindings/voidraft/internal/models/models';
 import {DocumentService, ExtensionService} from '@/../bindings/voidraft/internal/services';
 import {ensureSyntaxTree} from "@codemirror/language";
@@ -30,8 +29,8 @@ import {generateContentHash} from "@/common/utils/hashUtils";
 import {createTimerManager, type TimerManager} from '@/common/utils/timerUtils';
 import {EDITOR_CONFIG} from '@/common/constant/editor';
 import {createHttpClientExtension} from "@/views/editor/extensions/httpclient";
-import {markdownPreviewExtension, updateMarkdownPreviewTheme} from "@/views/editor/extensions/markdownPreview";
 import {createDebounce} from '@/common/utils/debounce';
+import markdownExtensions  from "@/views/editor/extensions/markdown";
 
 export interface DocumentStats {
     lines: number;
@@ -243,10 +242,12 @@ export const useEditorStore = defineStore('editor', () => {
             fontWeight: configStore.config.editing.fontWeight
         });
 
-        const wheelZoomExtension = createWheelZoomExtension(
-            () => configStore.increaseFontSize(),
-            () => configStore.decreaseFontSize()
-        );
+        const wheelZoomExtension = createWheelZoomExtension({
+            increaseFontSize: () => configStore.increaseFontSizeLocal(),
+            decreaseFontSize: () => configStore.decreaseFontSizeLocal(),
+            onSave: () => configStore.saveFontSize(),
+            saveDelay: 500
+        });
 
         // 统计扩展
         const statsExtension = createStatsUpdateExtension(updateDocumentStats);
@@ -262,8 +263,6 @@ export const useEditorStore = defineStore('editor', () => {
 
         const httpExtension = createHttpClientExtension();
 
-        // Markdown预览扩展
-        const previewExtension = markdownPreviewExtension();
 
         // 再次检查操作有效性
         if (!operationManager.isOperationValid(operationId, documentId)) {
@@ -299,7 +298,7 @@ export const useEditorStore = defineStore('editor', () => {
             codeBlockExtension,
             ...dynamicExtensions,
             ...httpExtension,
-            previewExtension
+            markdownExtensions
         ];
 
         // 创建编辑器状态
@@ -642,12 +641,6 @@ export const useEditorStore = defineStore('editor', () => {
         });
     };
 
-    // 应用 Markdown 预览主题
-    const applyPreviewThemeSettings = () => {
-        editorCache.values().forEach(instance => {
-            updateMarkdownPreviewTheme(instance.view);
-        });
-    };
 
     // 应用Tab设置
     const applyTabSettings = () => {
@@ -701,10 +694,6 @@ export const useEditorStore = defineStore('editor', () => {
             instance.view.destroy();
         });
         
-        // 清理 panelStore 状态（导航离开编辑器页面时）
-        const panelStore = usePanelStore();
-        panelStore.reset();
-
         currentEditor.value = null;
     };
 
@@ -790,7 +779,6 @@ export const useEditorStore = defineStore('editor', () => {
         // 配置更新方法
         applyFontSettings,
         applyThemeSettings,
-        applyPreviewThemeSettings,
         applyTabSettings,
         applyKeymapSettings,
 

frontend/src/stores/panelStore.ts

@@ -1,170 +0,0 @@
-import { defineStore } from 'pinia';
-import { ref, computed } from 'vue';
-import type { EditorView } from '@codemirror/view';
-import { useDocumentStore } from './documentStore';
-
-/**
- * 单个文档的预览状态
- */
-interface DocumentPreviewState {
-  isOpen: boolean;
-  isClosing: boolean;
-  blockFrom: number;
-  blockTo: number;
-}
-
-/**
- * 面板状态管理 Store
- * 管理编辑器中各种面板的显示状态（按文档ID区分）
- */
-export const usePanelStore = defineStore('panel', () => {
-  // 当前编辑器视图引用
-  const editorView = ref<EditorView | null>(null);
-
-  // 每个文档的预览状态 Map<documentId, PreviewState>
-  const documentPreviews = ref<Map<number, DocumentPreviewState>>(new Map());
-
-  /**
-   * 获取当前文档的预览状态
-   */
-  const markdownPreview = computed(() => {
-    const documentStore = useDocumentStore();
-    const currentDocId = documentStore.currentDocumentId;
-    
-    if (currentDocId === null) {
-      return {
-        isOpen: false,
-        isClosing: false,
-        blockFrom: 0,
-        blockTo: 0
-      };
-    }
-
-    return documentPreviews.value.get(currentDocId) || {
-      isOpen: false,
-      isClosing: false,
-      blockFrom: 0,
-      blockTo: 0
-    };
-  });
-
-  /**
-   * 设置编辑器视图
-   */
-  const setEditorView = (view: EditorView | null) => {
-    editorView.value = view;
-  };
-
-  /**
-   * 打开 Markdown 预览面板
-   */
-  const openMarkdownPreview = (from: number, to: number) => {
-    const documentStore = useDocumentStore();
-    const currentDocId = documentStore.currentDocumentId;
-    
-    if (currentDocId === null) return;
-
-    documentPreviews.value.set(currentDocId, {
-      isOpen: true,
-      isClosing: false,
-      blockFrom: from,
-      blockTo: to
-    });
-  };
-
-  /**
-   * 开始关闭 Markdown 预览面板
-   */
-  const startClosingMarkdownPreview = () => {
-    const documentStore = useDocumentStore();
-    const currentDocId = documentStore.currentDocumentId;
-    
-    if (currentDocId === null) return;
-
-    const state = documentPreviews.value.get(currentDocId);
-    if (state?.isOpen) {
-      documentPreviews.value.set(currentDocId, {
-        ...state,
-        isClosing: true
-      });
-    }
-  };
-
-  /**
-   * 关闭 Markdown 预览面板
-   */
-  const closeMarkdownPreview = () => {
-    const documentStore = useDocumentStore();
-    const currentDocId = documentStore.currentDocumentId;
-    
-    if (currentDocId === null) return;
-
-    documentPreviews.value.set(currentDocId, {
-      isOpen: false,
-      isClosing: false,
-      blockFrom: 0,
-      blockTo: 0
-    });
-  };
-
-  /**
-   * 更新预览块的范围（用于实时预览）
-   */
-  const updatePreviewRange = (from: number, to: number) => {
-    const documentStore = useDocumentStore();
-    const currentDocId = documentStore.currentDocumentId;
-    
-    if (currentDocId === null) return;
-
-    const state = documentPreviews.value.get(currentDocId);
-    if (state?.isOpen) {
-      documentPreviews.value.set(currentDocId, {
-        ...state,
-        blockFrom: from,
-        blockTo: to
-      });
-    }
-  };
-
-  /**
-   * 检查指定块是否正在预览
-   */
-  const isBlockPreviewing = (from: number, to: number): boolean => {
-    const preview = markdownPreview.value;
-    return preview.isOpen &&
-           preview.blockFrom === from &&
-           preview.blockTo === to;
-  };
-
-  /**
-   * 重置所有面板状态
-   */
-  const reset = () => {
-    documentPreviews.value.clear();
-    editorView.value = null;
-  };
-
-  /**
-   * 清理指定文档的预览状态（文档关闭时调用）
-   */
-  const clearDocumentPreview = (documentId: number) => {
-    documentPreviews.value.delete(documentId);
-  };
-
-  return {
-    // 状态
-    editorView,
-    markdownPreview,
-
-    // 方法
-    setEditorView,
-    openMarkdownPreview,
-    startClosingMarkdownPreview,
-    closeMarkdownPreview,
-    updatePreviewRange,
-    isBlockPreviewing,
-    reset,
-    clearDocumentPreview
-  };
-});
-

frontend/src/stores/themeStore.ts

@@ -138,10 +138,8 @@ export const useThemeStore = defineStore('theme', () => {
 
   const refreshEditorTheme = () => {
     applyThemeToDOM(currentTheme.value);
-
     const editorStore = useEditorStore();
     editorStore?.applyThemeSettings();
-    editorStore?.applyPreviewThemeSettings();
   };
 
   return {

frontend/src/views/editor/Editor.vue

@@ -1,16 +1,17 @@
 <script setup lang="ts">
-import { computed, onBeforeUnmount, onMounted, ref } from 'vue';
-import { useEditorStore } from '@/stores/editorStore';
-import { useDocumentStore } from '@/stores/documentStore';
-import { useConfigStore } from '@/stores/configStore';
+import {computed, onBeforeUnmount, onMounted, ref} from 'vue';
+import {useEditorStore} from '@/stores/editorStore';
+import {useDocumentStore} from '@/stores/documentStore';
+import {useConfigStore} from '@/stores/configStore';
 import Toolbar from '@/components/toolbar/Toolbar.vue';
-import { useWindowStore } from '@/stores/windowStore';
+import {useWindowStore} from '@/stores/windowStore';
 import LoadingScreen from '@/components/loading/LoadingScreen.vue';
-import { useTabStore } from '@/stores/tabStore';
+import {useTabStore} from '@/stores/tabStore';
 import ContextMenu from './contextMenu/ContextMenu.vue';
-import { contextMenuManager } from './contextMenu/manager';
+import {contextMenuManager} from './contextMenu/manager';
 import TranslatorDialog from './extensions/translator/TranslatorDialog.vue';
-import { translatorManager } from './extensions/translator/manager';
+import {translatorManager} from './extensions/translator/manager';
+
 
 const editorStore = useEditorStore();
 const documentStore = useDocumentStore();
@@ -44,16 +45,17 @@ onBeforeUnmount(() => {
   <div class="editor-container">
     <!-- 加载动画   -->
     <transition name="loading-fade">
-      <LoadingScreen v-if="editorStore.isLoading && enableLoadingAnimation" text="VOIDRAFT" />
+      <LoadingScreen v-if="editorStore.isLoading && enableLoadingAnimation" text="VOIDRAFT"/>
     </transition>
     <!-- 编辑器区域 -->
     <div ref="editorElement" class="editor"></div>
+
     <!-- 工具栏 -->
-    <Toolbar />
+    <Toolbar/>
     <!-- 右键菜单 -->
-    <ContextMenu :portal-target="editorElement" />
+    <ContextMenu :portal-target="editorElement"/>
     <!-- 翻译器弹窗 -->
-    <TranslatorDialog :portal-target="editorElement" />
+    <TranslatorDialog :portal-target="editorElement"/>
   </div>
 </template>
 
@@ -68,7 +70,7 @@ onBeforeUnmount(() => {
 
   .editor {
     width: 100%;
-    flex: 1;
+    height: 100%;
     overflow: hidden;
     position: relative;
   }

frontend/src/views/editor/basic/wheelZoomExtension.ts

@@ -1,25 +1,40 @@
 import {EditorView} from '@codemirror/view';
 import type {Extension} from '@codemirror/state';
+import {createDebounce} from '@/common/utils/debounce';
 
-type FontAdjuster = () => Promise<void> | void;
+type FontAdjuster = () => void;
+type SaveCallback = () => Promise<void> | void;
 
-const runAdjuster = (adjuster: FontAdjuster) => {
-  try {
-    const result = adjuster();
-    if (result && typeof (result as Promise<void>).then === 'function') {
-      (result as Promise<void>).catch((error) => {
-        console.error('Failed to adjust font size:', error);
-      });
-    }
-  } catch (error) {
-    console.error('Failed to adjust font size:', error);
-  }
-};
+export interface WheelZoomOptions {
+  /** 增加字体大小的回调（立即执行） */
+  increaseFontSize: FontAdjuster;
+  /** 减少字体大小的回调（立即执行） */
+  decreaseFontSize: FontAdjuster;
+  /** 保存回调（防抖执行），在滚动结束后调用 */
+  onSave?: SaveCallback;
+  /** 保存防抖延迟（毫秒），默认 300ms */
+  saveDelay?: number;
+}
+
+export const createWheelZoomExtension = (options: WheelZoomOptions): Extension => {
+  const {increaseFontSize, decreaseFontSize, onSave, saveDelay = 300} = options;
+
+  // 如果有 onSave 回调，创建防抖版本
+  const {debouncedFn: debouncedSave} = onSave
+    ? createDebounce(() => {
+        try {
+          const result = onSave();
+          if (result && typeof (result as Promise<void>).then === 'function') {
+            (result as Promise<void>).catch((error) => {
+              console.error('Failed to save font size:', error);
+            });
+          }
+        } catch (error) {
+          console.error('Failed to save font size:', error);
+        }
+      }, {delay: saveDelay})
+    : {debouncedFn: null};
 
-export const createWheelZoomExtension = (
-  increaseFontSize: FontAdjuster,
-  decreaseFontSize: FontAdjuster
-): Extension => {
   return EditorView.domEventHandlers({
     wheel(event) {
       if (!event.ctrlKey) {
@@ -28,10 +43,16 @@ export const createWheelZoomExtension = (
 
       event.preventDefault();
 
+      // 立即更新字体大小
       if (event.deltaY < 0) {
-        runAdjuster(increaseFontSize);
+        increaseFontSize();
       } else if (event.deltaY > 0) {
-        runAdjuster(decreaseFontSize);
+        decreaseFontSize();
+      }
+
+      // 防抖保存
+      if (debouncedSave) {
+        debouncedSave();
       }
 
       return true;

frontend/src/views/editor/extensions/codeblock/decorations.ts

@@ -115,6 +115,10 @@ const atomicNoteBlock = ViewPlugin.fromClass(
 
 /**
  * 块背景层 - 修复高度计算问题
+ * 
+ * 使用 lineBlockAt 获取行坐标，而不是 coordsAtPos 获取字符坐标。
+ * 这样即使某些字符被隐藏（如 heading 的 # 标记 fontSize: 0），
+ * 行的坐标也不会受影响，边界线位置正确。
  */
 const blockLayer = layer({
   above: false,
@@ -135,14 +139,17 @@ const blockLayer = layer({
         return;
       }
       
-      // view.coordsAtPos 如果编辑器不可见则返回 null
-      const fromCoordsTop = view.coordsAtPos(Math.max(block.content.from, view.visibleRanges[0].from))?.top;
-      let toCoordsBottom = view.coordsAtPos(Math.min(block.content.to, view.visibleRanges[view.visibleRanges.length - 1].to))?.bottom;
+      const fromPos = Math.max(block.content.from, view.visibleRanges[0].from);
+      const toPos = Math.min(block.content.to, view.visibleRanges[view.visibleRanges.length - 1].to);
       
-      if (fromCoordsTop === undefined || toCoordsBottom === undefined) {
-        idx++;
-        return;
-      }
+      // 使用 lineBlockAt 获取行的坐标，不受字符样式（如 fontSize: 0）影响
+      const fromLineBlock = view.lineBlockAt(fromPos);
+      const toLineBlock = view.lineBlockAt(toPos);
+      
+      // lineBlockAt 返回的 top 是相对于内容区域的偏移
+      // 转换为视口坐标进行后续计算
+      const fromCoordsTop = fromLineBlock.top + view.documentTop;
+      let toCoordsBottom = toLineBlock.bottom + view.documentTop;
       
       // 对最后一个块进行特殊处理，让它直接延伸到底部
       if (idx === blocks.length - 1) {
@@ -151,7 +158,7 @@ const blockLayer = layer({
         
         // 让最后一个块直接延伸到编辑器底部
         if (contentBottom < editorHeight) {
-          const extraHeight = editorHeight - contentBottom-10;
+          const extraHeight = editorHeight - contentBottom - 10;
           toCoordsBottom += extraHeight;
         }
       }

frontend/src/views/editor/extensions/codeblock/lang-parser/languages.ts

@@ -5,9 +5,14 @@
 import {jsonLanguage} from "@codemirror/lang-json";
 import {pythonLanguage} from "@codemirror/lang-python";
 import {javascriptLanguage, typescriptLanguage} from "@codemirror/lang-javascript";
-import {htmlLanguage} from "@codemirror/lang-html";
+import {html, htmlLanguage} from "@codemirror/lang-html";
 import {StandardSQL} from "@codemirror/lang-sql";
-import {markdownLanguage} from "@codemirror/lang-markdown";
+import {markdown, markdownLanguage} from "@codemirror/lang-markdown";
+import {Subscript, Superscript, Table} from "@lezer/markdown";
+import {Highlight} from "@/views/editor/extensions/markdown/syntax/highlight";
+import {Insert} from "@/views/editor/extensions/markdown/syntax/insert";
+import {Math} from "@/views/editor/extensions/markdown/syntax/math";
+import {Footnote} from "@/views/editor/extensions/markdown/syntax/footnote";
 import {javaLanguage} from "@codemirror/lang-java";
 import {phpLanguage} from "@codemirror/lang-php";
 import {cssLanguage} from "@codemirror/lang-css";
@@ -22,9 +27,9 @@ import {wastLanguage} from "@codemirror/lang-wast";
 import {sassLanguage} from "@codemirror/lang-sass";
 import {lessLanguage} from "@codemirror/lang-less";
 import {angularLanguage} from "@codemirror/lang-angular";
-import { svelteLanguage } from "@replit/codemirror-lang-svelte";
-import { httpLanguage } from "@/views/editor/extensions/httpclient/language/http-language";
-import { mermaidLanguage } from '@/views/editor/language/mermaid';
+import {svelteLanguage} from "@replit/codemirror-lang-svelte";
+import {httpLanguage} from "@/views/editor/extensions/httpclient/language/http-language";
+import {mermaidLanguage} from '@/views/editor/language/mermaid';
 import {StreamLanguage} from "@codemirror/language";
 import {ruby} from "@codemirror/legacy-modes/mode/ruby";
 import {shell} from "@codemirror/legacy-modes/mode/shell";
@@ -64,6 +69,7 @@ import dartPrettierPlugin from "@/common/prettier/plugins/dart";
 import luaPrettierPlugin from "@/common/prettier/plugins/lua";
 import webPrettierPlugin from "@/common/prettier/plugins/web";
 import * as prettierPluginEstree from "prettier/plugins/estree";
+import {languages} from "@codemirror/language-data";
 
 /**
  * 语言信息类
@@ -110,7 +116,19 @@ export const LANGUAGES: LanguageInfo[] = [
         parser: "sql",
         plugins: [sqlPrettierPlugin]
     }),
-    new LanguageInfo("md", "Markdown", markdownLanguage.parser, ["md"], {
+    new LanguageInfo("md", "Markdown", markdown({
+        base: markdownLanguage,
+        extensions: [Subscript, Superscript, Highlight, Insert, Math, Footnote, Table],
+        completeHTMLTags: true,
+        pasteURLAsLink: true,
+        htmlTagLanguage: html({
+            matchClosingTags: true,
+            autoCloseTags: true
+        }),
+        addKeymap: true,
+        codeLanguages: languages,
+
+    }).language.parser, ["md"], {
         parser: "markdown",
         plugins: [markdownPrettierPlugin]
     }),

frontend/src/views/editor/extensions/markdown/index.ts

@@ -0,0 +1,45 @@
+import { Extension } from '@codemirror/state';
+import { blockquote } from './plugins/blockquote';
+import { codeblock } from './plugins/code-block';
+import { headings } from './plugins/heading';
+import { hideMarks } from './plugins/hide-mark';
+import { image } from './plugins/image';
+import { links } from './plugins/link';
+import { lists } from './plugins/list';
+import { headingSlugField } from './state/heading-slug';
+import { emoji } from './plugins/emoji';
+import { horizontalRule } from './plugins/horizontal-rule';
+import { inlineCode } from './plugins/inline-code';
+import { subscriptSuperscript } from './plugins/subscript-superscript';
+import { highlight } from './plugins/highlight';
+import { insert } from './plugins/insert';
+import { math } from './plugins/math';
+import { footnote } from './plugins/footnote';
+import table from "./plugins/table";
+import {htmlBlockExtension} from "./plugins/html";
+
+/**
+ * markdown extensions
+ */
+export const markdownExtensions: Extension = [
+	headingSlugField,
+	blockquote(),
+	codeblock(),
+	headings(),
+	hideMarks(),
+	lists(),
+	links(),
+	image(),
+	emoji(),
+	horizontalRule(),
+	inlineCode(),
+	subscriptSuperscript(),
+	highlight(),
+	insert(),
+	math(),
+	footnote(),
+    table(),
+    htmlBlockExtension
+];
+
+export default markdownExtensions;

frontend/src/views/editor/extensions/markdown/plugins/blockquote.ts

@@ -0,0 +1,175 @@
+import {
+	Decoration,
+	DecorationSet,
+	EditorView,
+	ViewPlugin,
+	ViewUpdate
+} from '@codemirror/view';
+import { RangeSetBuilder } from '@codemirror/state';
+import { syntaxTree } from '@codemirror/language';
+import { checkRangeOverlap, invisibleDecoration, RangeTuple } from '../util';
+
+/** Pre-computed line decoration */
+const LINE_DECO = Decoration.line({ class: 'cm-blockquote' });
+
+/**
+ * Blockquote plugin.
+ *
+ * Features:
+ * - Decorates blockquote with left border
+ * - Hides quote marks (>) when cursor is outside
+ * - Supports nested blockquotes
+ */
+export function blockquote() {
+	return [blockQuotePlugin, baseTheme];
+}
+
+/**
+ * Collect blockquote ranges in visible viewport.
+ */
+function collectBlockquoteRanges(view: EditorView): RangeTuple[] {
+	const ranges: RangeTuple[] = [];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter(node) {
+				if (node.type.name !== 'Blockquote') return;
+				if (seen.has(node.from)) return;
+				seen.add(node.from);
+				ranges.push([node.from, node.to]);
+				return false; // Don't recurse into nested
+			}
+		});
+	}
+
+	return ranges;
+}
+
+/**
+ * Get cursor's blockquote position (-1 if not in any).
+ */
+function getCursorBlockquotePos(view: EditorView, ranges: RangeTuple[]): number {
+	const sel = view.state.selection.main;
+	const selRange: RangeTuple = [sel.from, sel.to];
+	
+	for (const range of ranges) {
+		if (checkRangeOverlap(selRange, range)) {
+			return range[0];
+		}
+	}
+	return -1;
+}
+
+/**
+ * Build blockquote decorations for visible viewport.
+ */
+function buildDecorations(view: EditorView): DecorationSet {
+	const builder = new RangeSetBuilder<Decoration>();
+	const items: { pos: number; endPos?: number; deco: Decoration }[] = [];
+	const processedLines = new Set<number>();
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter(node) {
+				if (node.type.name !== 'Blockquote') return;
+				if (seen.has(node.from)) return;
+				seen.add(node.from);
+
+				const inBlock = checkRangeOverlap(
+					[node.from, node.to],
+					[view.state.selection.main.from, view.state.selection.main.to]
+				);
+				if (inBlock) return false;
+
+				// Line decorations
+				const startLine = view.state.doc.lineAt(node.from).number;
+				const endLine = view.state.doc.lineAt(node.to).number;
+
+				for (let i = startLine; i <= endLine; i++) {
+					if (!processedLines.has(i)) {
+						processedLines.add(i);
+						const line = view.state.doc.line(i);
+						items.push({ pos: line.from, deco: LINE_DECO });
+					}
+				}
+
+				// Hide quote marks
+				const cursor = node.node.cursor();
+				cursor.iterate((child) => {
+					if (child.type.name === 'QuoteMark') {
+						items.push({ pos: child.from, endPos: child.to, deco: invisibleDecoration });
+					}
+				});
+
+				return false;
+			}
+		});
+	}
+
+	// Sort and build
+	items.sort((a, b) => a.pos - b.pos);
+	
+	for (const item of items) {
+		if (item.endPos !== undefined) {
+			builder.add(item.pos, item.endPos, item.deco);
+		} else {
+			builder.add(item.pos, item.pos, item.deco);
+		}
+	}
+
+	return builder.finish();
+}
+
+/**
+ * Blockquote plugin with optimized updates.
+ */
+class BlockQuotePlugin {
+	decorations: DecorationSet;
+	private blockRanges: RangeTuple[] = [];
+	private cursorBlockPos = -1;
+
+	constructor(view: EditorView) {
+		this.blockRanges = collectBlockquoteRanges(view);
+		this.cursorBlockPos = getCursorBlockquotePos(view, this.blockRanges);
+		this.decorations = buildDecorations(view);
+	}
+
+	update(update: ViewUpdate) {
+		const { docChanged, viewportChanged, selectionSet } = update;
+
+		if (docChanged || viewportChanged) {
+			this.blockRanges = collectBlockquoteRanges(update.view);
+			this.cursorBlockPos = getCursorBlockquotePos(update.view, this.blockRanges);
+			this.decorations = buildDecorations(update.view);
+			return;
+		}
+
+		if (selectionSet) {
+			const newPos = getCursorBlockquotePos(update.view, this.blockRanges);
+			if (newPos !== this.cursorBlockPos) {
+				this.cursorBlockPos = newPos;
+				this.decorations = buildDecorations(update.view);
+			}
+		}
+	}
+}
+
+const blockQuotePlugin = ViewPlugin.fromClass(BlockQuotePlugin, {
+	decorations: (v) => v.decorations
+});
+
+/**
+ * Base theme for blockquotes.
+ */
+const baseTheme = EditorView.baseTheme({
+	'.cm-blockquote': {
+		borderLeft: '4px solid var(--cm-blockquote-border, #ccc)',
+		color: 'var(--cm-blockquote-color, #666)'
+	}
+});

frontend/src/views/editor/extensions/markdown/plugins/code-block.ts

@@ -0,0 +1,371 @@
+import { Extension, RangeSetBuilder } from '@codemirror/state';
+import {
+	ViewPlugin,
+	DecorationSet,
+	Decoration,
+	EditorView,
+	ViewUpdate,
+	WidgetType
+} from '@codemirror/view';
+import { syntaxTree } from '@codemirror/language';
+import { checkRangeOverlap, invisibleDecoration, RangeTuple } from '../util';
+
+/** Code block node types in syntax tree */
+const CODE_BLOCK_TYPES = new Set(['FencedCode', 'CodeBlock']);
+
+/** Copy button icon SVGs */
+const ICON_COPY = `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="9" y="9" width="13" height="13" rx="2" ry="2"/><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/></svg>`;
+const ICON_CHECK = `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="20 6 9 17 4 12"/></svg>`;
+
+/** Pre-computed line decoration classes */
+const LINE_DECO_NORMAL = Decoration.line({ class: 'cm-codeblock' });
+const LINE_DECO_BEGIN = Decoration.line({ class: 'cm-codeblock cm-codeblock-begin' });
+const LINE_DECO_END = Decoration.line({ class: 'cm-codeblock cm-codeblock-end' });
+const LINE_DECO_SINGLE = Decoration.line({ class: 'cm-codeblock cm-codeblock-begin cm-codeblock-end' });
+
+/** Code block metadata for widget */
+interface CodeBlockMeta {
+	from: number;
+	to: number;
+	language: string | null;
+}
+
+/**
+ * Code block extension with language label and copy button.
+ * 
+ * Features:
+ * - Adds background styling to code blocks
+ * - Shows language label + copy button when language is specified
+ * - Hides markers when cursor is outside block
+ * - Optimized with viewport-only rendering and minimal rebuilds
+ */
+export const codeblock = (): Extension => [codeBlockPlugin, baseTheme];
+
+/**
+ * Widget for displaying language label and copy button.
+ * Content is computed lazily on copy action.
+ */
+class CodeBlockInfoWidget extends WidgetType {
+	constructor(readonly meta: CodeBlockMeta) {
+		super();
+	}
+
+	eq(other: CodeBlockInfoWidget): boolean {
+		return other.meta.from === this.meta.from &&
+			other.meta.language === this.meta.language;
+	}
+
+	toDOM(view: EditorView): HTMLElement {
+		const container = document.createElement('span');
+		container.className = 'cm-code-block-info';
+
+		if (this.meta.language) {
+			const lang = document.createElement('span');
+			lang.className = 'cm-code-block-lang';
+			lang.textContent = this.meta.language;
+			container.append(lang);
+		}
+
+		const btn = document.createElement('button');
+		btn.className = 'cm-code-block-copy-btn';
+		btn.title = 'Copy';
+		btn.innerHTML = ICON_COPY;
+
+		btn.addEventListener('click', (e) => {
+			e.preventDefault();
+			e.stopPropagation();
+			this.copyContent(view, btn);
+		});
+
+		btn.addEventListener('mousedown', (e) => {
+			e.preventDefault();
+			e.stopPropagation();
+		});
+
+		container.append(btn);
+		return container;
+	}
+
+	/** Lazy content extraction and copy */
+	private copyContent(view: EditorView, btn: HTMLButtonElement): void {
+		const { from, to } = this.meta;
+		const text = view.state.doc.sliceString(from, to);
+		const lines = text.split('\n');
+		const content = lines.length >= 2 ? lines.slice(1, -1).join('\n') : '';
+		
+		if (!content) return;
+
+		navigator.clipboard.writeText(content).then(() => {
+			btn.innerHTML = ICON_CHECK;
+			setTimeout(() => {
+				btn.innerHTML = ICON_COPY;
+			}, 1500);
+		});
+	}
+
+	ignoreEvent(): boolean {
+		return true;
+	}
+}
+
+/** Parsed code block info from single tree traversal */
+interface ParsedBlock {
+	from: number;
+	to: number;
+	language: string | null;
+	marks: RangeTuple[]; // CodeMark and CodeInfo positions to hide
+}
+
+/**
+ * Parse a code block node in a single traversal.
+ * Extracts language and mark positions together.
+ */
+function parseCodeBlock(view: EditorView, nodeFrom: number, nodeTo: number, node: any): ParsedBlock {
+	let language: string | null = null;
+	const marks: RangeTuple[] = [];
+
+	node.toTree().iterate({
+		enter: ({ type, from, to }) => {
+			const absFrom = nodeFrom + from;
+			const absTo = nodeFrom + to;
+			
+			if (type.name === 'CodeInfo') {
+				language = view.state.doc.sliceString(absFrom, absTo).trim();
+				marks.push([absFrom, absTo]);
+			} else if (type.name === 'CodeMark') {
+				marks.push([absFrom, absTo]);
+			}
+		}
+	});
+
+	return { from: nodeFrom, to: nodeTo, language, marks };
+}
+
+/**
+ * Find which code block the cursor is in (returns block start position, or -1 if not in any).
+ */
+function getCursorBlockPosition(view: EditorView, blocks: RangeTuple[]): number {
+	const { ranges } = view.state.selection;
+	for (const sel of ranges) {
+		const selRange: RangeTuple = [sel.from, sel.to];
+		for (const block of blocks) {
+			if (checkRangeOverlap(selRange, block)) {
+				return block[0]; // Return the block's start position as identifier
+			}
+		}
+	}
+	return -1;
+}
+
+/**
+ * Collect all code block ranges in visible viewport.
+ */
+function collectCodeBlockRanges(view: EditorView): RangeTuple[] {
+	const ranges: RangeTuple[] = [];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo }) => {
+				if (!CODE_BLOCK_TYPES.has(type.name)) return;
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+				ranges.push([nodeFrom, nodeTo]);
+			}
+		});
+	}
+
+	return ranges;
+}
+
+/**
+ * Build decorations for visible code blocks.
+ * Uses RangeSetBuilder for efficient sorted construction.
+ */
+function buildDecorations(view: EditorView): DecorationSet {
+	const builder = new RangeSetBuilder<Decoration>();
+	const items: { pos: number; endPos?: number; deco: Decoration; isWidget?: boolean; isReplace?: boolean }[] = [];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo, node }) => {
+				if (!CODE_BLOCK_TYPES.has(type.name)) return;
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+
+				// Check if cursor is in this block
+				const inBlock = checkRangeOverlap(
+					[nodeFrom, nodeTo],
+					[view.state.selection.main.from, view.state.selection.main.to]
+				);
+				if (inBlock) return;
+
+				// Parse block in single traversal
+				const block = parseCodeBlock(view, nodeFrom, nodeTo, node);
+				const startLine = view.state.doc.lineAt(nodeFrom);
+				const endLine = view.state.doc.lineAt(nodeTo);
+
+				// Add line decorations
+				for (let num = startLine.number; num <= endLine.number; num++) {
+					const line = view.state.doc.line(num);
+					let deco: Decoration;
+					
+					if (startLine.number === endLine.number) {
+						deco = LINE_DECO_SINGLE;
+					} else if (num === startLine.number) {
+						deco = LINE_DECO_BEGIN;
+					} else if (num === endLine.number) {
+						deco = LINE_DECO_END;
+					} else {
+						deco = LINE_DECO_NORMAL;
+					}
+					
+					items.push({ pos: line.from, deco });
+				}
+
+				// Add info widget
+				const meta: CodeBlockMeta = {
+					from: nodeFrom,
+					to: nodeTo,
+					language: block.language
+				};
+				items.push({
+					pos: startLine.to,
+					deco: Decoration.widget({
+						widget: new CodeBlockInfoWidget(meta),
+						side: 1
+					}),
+					isWidget: true
+				});
+
+				// Hide marks
+				for (const [mFrom, mTo] of block.marks) {
+					items.push({ pos: mFrom, endPos: mTo, deco: invisibleDecoration, isReplace: true });
+				}
+			}
+		});
+	}
+
+	// Sort by position and add to builder
+	items.sort((a, b) => {
+		if (a.pos !== b.pos) return a.pos - b.pos;
+		// Widgets should come after line decorations at same position
+		return (a.isWidget ? 1 : 0) - (b.isWidget ? 1 : 0);
+	});
+
+	for (const item of items) {
+		if (item.isReplace && item.endPos !== undefined) {
+			builder.add(item.pos, item.endPos, item.deco);
+		} else {
+			builder.add(item.pos, item.pos, item.deco);
+		}
+	}
+
+	return builder.finish();
+}
+
+/**
+ * Code block plugin with optimized update detection.
+ */
+class CodeBlockPluginClass {
+	decorations: DecorationSet;
+	private blockRanges: RangeTuple[] = [];
+	private cursorBlockPos = -1; // Which block the cursor is in (-1 = none)
+
+	constructor(view: EditorView) {
+		this.blockRanges = collectCodeBlockRanges(view);
+		this.cursorBlockPos = getCursorBlockPosition(view, this.blockRanges);
+		this.decorations = buildDecorations(view);
+	}
+
+	update(update: ViewUpdate): void {
+		const { docChanged, viewportChanged, selectionSet } = update;
+
+		// Always rebuild on doc or viewport change
+		if (docChanged || viewportChanged) {
+			this.blockRanges = collectCodeBlockRanges(update.view);
+			this.cursorBlockPos = getCursorBlockPosition(update.view, this.blockRanges);
+			this.decorations = buildDecorations(update.view);
+			return;
+		}
+
+		// For selection changes, only rebuild if cursor moves to a different block
+		if (selectionSet) {
+			const newBlockPos = getCursorBlockPosition(update.view, this.blockRanges);
+			
+			if (newBlockPos !== this.cursorBlockPos) {
+				this.cursorBlockPos = newBlockPos;
+				this.decorations = buildDecorations(update.view);
+			}
+		}
+	}
+}
+
+const codeBlockPlugin = ViewPlugin.fromClass(CodeBlockPluginClass, {
+	decorations: (v) => v.decorations
+});
+
+/**
+ * Base theme for code blocks.
+ */
+const baseTheme = EditorView.baseTheme({
+	'.cm-codeblock': {
+		backgroundColor: 'var(--cm-codeblock-bg)',
+		fontFamily: 'inherit',
+	},
+	'.cm-codeblock-begin': {
+		borderTopLeftRadius: 'var(--cm-codeblock-radius)',
+		borderTopRightRadius: 'var(--cm-codeblock-radius)',
+		position: 'relative',
+	},
+	'.cm-codeblock-end': {
+		borderBottomLeftRadius: 'var(--cm-codeblock-radius)',
+		borderBottomRightRadius: 'var(--cm-codeblock-radius)',
+	},
+	'.cm-code-block-info': {
+		position: 'absolute',
+		right: '8px',
+		top: '50%',
+		transform: 'translateY(-50%)',
+		display: 'inline-flex',
+		alignItems: 'center',
+		gap: '0.5em',
+		zIndex: '5',
+		opacity: '0.5',
+		transition: 'opacity 0.15s'
+	},
+	'.cm-code-block-info:hover': {
+		opacity: '1'
+	},
+	'.cm-code-block-lang': {
+		color: 'var(--cm-codeblock-lang, var(--cm-foreground))',
+		textTransform: 'lowercase',
+		userSelect: 'none'
+	},
+	'.cm-code-block-copy-btn': {
+		display: 'inline-flex',
+		alignItems: 'center',
+		justifyContent: 'center',
+		padding: '0.15em',
+		border: 'none',
+		borderRadius: '2px',
+		background: 'transparent',
+		color: 'var(--cm-codeblock-lang, var(--cm-foreground))',
+		cursor: 'pointer',
+		opacity: '0.7',
+		transition: 'opacity 0.15s, background 0.15s'
+	},
+	'.cm-code-block-copy-btn:hover': {
+		opacity: '1',
+		background: 'rgba(128, 128, 128, 0.2)'
+	},
+	'.cm-code-block-copy-btn svg': {
+		width: '1em',
+		height: '1em'
+	}
+});

frontend/src/views/editor/extensions/markdown/plugins/emoji.ts

@@ -0,0 +1,196 @@
+import { Extension, RangeSetBuilder } from '@codemirror/state';
+import {
+	ViewPlugin,
+	DecorationSet,
+	Decoration,
+	EditorView,
+	ViewUpdate,
+	WidgetType
+} from '@codemirror/view';
+import { checkRangeOverlap, RangeTuple } from '../util';
+import { emojies } from '@/common/constant/emojies';
+
+/**
+ * Emoji plugin that converts :emoji_name: to actual emoji characters.
+ *
+ * Features:
+ * - Detects emoji patterns like :smile:, :heart:, etc.
+ * - Replaces them with actual emoji characters
+ * - Shows the original text when cursor is nearby
+ * - Optimized with cached matches and minimal rebuilds
+ */
+export const emoji = (): Extension => [emojiPlugin, baseTheme];
+
+/** Non-global regex for matchAll (more efficient than global with lastIndex reset) */
+const EMOJI_REGEX = /:([a-z0-9_+\-]+):/gi;
+
+/**
+ * Emoji widget with optimized rendering.
+ */
+class EmojiWidget extends WidgetType {
+	constructor(
+		readonly emoji: string,
+		readonly name: string
+	) {
+		super();
+	}
+
+	eq(other: EmojiWidget): boolean {
+		return other.emoji === this.emoji;
+	}
+
+	toDOM(): HTMLElement {
+		const span = document.createElement('span');
+		span.className = 'cm-emoji';
+		span.textContent = this.emoji;
+		span.title = `:${this.name}:`;
+		return span;
+	}
+}
+
+/**
+ * Cached emoji match.
+ */
+interface EmojiMatch {
+	from: number;
+	to: number;
+	name: string;
+	emoji: string;
+}
+
+/**
+ * Find all emoji matches in visible ranges.
+ */
+function findAllEmojiMatches(view: EditorView): EmojiMatch[] {
+	const matches: EmojiMatch[] = [];
+	const doc = view.state.doc;
+
+	for (const { from, to } of view.visibleRanges) {
+		const text = doc.sliceString(from, to);
+		let match: RegExpExecArray | null;
+		
+		EMOJI_REGEX.lastIndex = 0;
+		while ((match = EMOJI_REGEX.exec(text)) !== null) {
+			const name = match[1].toLowerCase();
+			const emojiChar = emojies[name];
+
+			if (emojiChar) {
+				matches.push({
+					from: from + match.index,
+					to: from + match.index + match[0].length,
+					name,
+					emoji: emojiChar
+				});
+			}
+		}
+	}
+
+	return matches;
+}
+
+/**
+ * Get which emoji the cursor is in (-1 if none).
+ */
+function getCursorEmojiIndex(matches: EmojiMatch[], selFrom: number, selTo: number): number {
+	const selRange: RangeTuple = [selFrom, selTo];
+	
+	for (let i = 0; i < matches.length; i++) {
+		if (checkRangeOverlap([matches[i].from, matches[i].to], selRange)) {
+			return i;
+		}
+	}
+	return -1;
+}
+
+/**
+ * Build decorations from cached matches.
+ */
+function buildDecorations(matches: EmojiMatch[], selFrom: number, selTo: number): DecorationSet {
+	const builder = new RangeSetBuilder<Decoration>();
+	const selRange: RangeTuple = [selFrom, selTo];
+
+	for (const match of matches) {
+		// Skip if cursor overlaps this emoji
+		if (checkRangeOverlap([match.from, match.to], selRange)) {
+			continue;
+		}
+
+		builder.add(
+			match.from,
+			match.to,
+			Decoration.replace({
+				widget: new EmojiWidget(match.emoji, match.name)
+			})
+		);
+	}
+
+	return builder.finish();
+}
+
+/**
+ * Emoji plugin with cached matches and optimized updates.
+ */
+class EmojiPlugin {
+	decorations: DecorationSet;
+	private matches: EmojiMatch[] = [];
+	private cursorEmojiIdx = -1;
+
+	constructor(view: EditorView) {
+		this.matches = findAllEmojiMatches(view);
+		const { from, to } = view.state.selection.main;
+		this.cursorEmojiIdx = getCursorEmojiIndex(this.matches, from, to);
+		this.decorations = buildDecorations(this.matches, from, to);
+	}
+
+	update(update: ViewUpdate) {
+		const { docChanged, viewportChanged, selectionSet } = update;
+
+		// Rebuild matches on doc or viewport change
+		if (docChanged || viewportChanged) {
+			this.matches = findAllEmojiMatches(update.view);
+			const { from, to } = update.state.selection.main;
+			this.cursorEmojiIdx = getCursorEmojiIndex(this.matches, from, to);
+			this.decorations = buildDecorations(this.matches, from, to);
+			return;
+		}
+
+		// For selection changes, only rebuild if cursor enters/leaves an emoji
+		if (selectionSet) {
+			const { from, to } = update.state.selection.main;
+			const newIdx = getCursorEmojiIndex(this.matches, from, to);
+
+			if (newIdx !== this.cursorEmojiIdx) {
+				this.cursorEmojiIdx = newIdx;
+				this.decorations = buildDecorations(this.matches, from, to);
+			}
+		}
+	}
+}
+
+const emojiPlugin = ViewPlugin.fromClass(EmojiPlugin, {
+	decorations: (v) => v.decorations
+});
+
+/**
+ * Base theme for emoji.
+ */
+const baseTheme = EditorView.baseTheme({
+	'.cm-emoji': {
+		verticalAlign: 'middle',
+		cursor: 'default'
+	}
+});
+
+/**
+ * Get all available emoji names.
+ */
+export function getEmojiNames(): string[] {
+	return Object.keys(emojies);
+}
+
+/**
+ * Get emoji by name.
+ */
+export function getEmoji(name: string): string | undefined {
+	return emojies[name.toLowerCase()];
+}

frontend/src/views/editor/extensions/markdown/plugins/footnote.ts

@@ -0,0 +1,736 @@
+/**
+ * Footnote plugin for CodeMirror.
+ *
+ * Features:
+ * - Renders footnote references as superscript numbers/labels
+ * - Renders inline footnotes as superscript numbers with embedded content
+ * - Shows footnote content on hover (tooltip)
+ * - Click to jump between reference and definition
+ * - Hides syntax marks when cursor is outside
+ */
+
+import { Extension, RangeSetBuilder, EditorState } from '@codemirror/state';
+import { syntaxTree } from '@codemirror/language';
+import {
+	ViewPlugin,
+	DecorationSet,
+	Decoration,
+	EditorView,
+	ViewUpdate,
+	WidgetType,
+	hoverTooltip,
+	Tooltip,
+} from '@codemirror/view';
+import { checkRangeOverlap, invisibleDecoration, RangeTuple } from '../util';
+
+// ============================================================================
+// Types
+// ============================================================================
+
+interface FootnoteDefinition {
+	id: string;
+	content: string;
+	from: number;
+	to: number;
+}
+
+interface FootnoteReference {
+	id: string;
+	from: number;
+	to: number;
+	index: number;
+}
+
+interface InlineFootnoteInfo {
+	content: string;
+	from: number;
+	to: number;
+	index: number;
+}
+
+/**
+ * Collected footnote data with O(1) lookup indexes.
+ */
+interface FootnoteData {
+	definitions: Map<string, FootnoteDefinition>;
+	references: FootnoteReference[];
+	inlineFootnotes: InlineFootnoteInfo[];
+	referencesByPos: Map<number, FootnoteReference>;
+	inlineByPos: Map<number, InlineFootnoteInfo>;
+	definitionByPos: Map<number, FootnoteDefinition>; // For position-based lookup
+	firstRefById: Map<string, FootnoteReference>;
+	// All footnote ranges for cursor detection
+	allRanges: RangeTuple[];
+}
+
+// ============================================================================
+// Footnote Collection (cached via closure)
+// ============================================================================
+
+let cachedData: FootnoteData | null = null;
+let cachedDocLength = -1;
+
+/**
+ * Collect all footnote data from the document.
+ */
+function collectFootnotes(state: EditorState): FootnoteData {
+	// Simple cache invalidation based on doc length
+	if (cachedData && cachedDocLength === state.doc.length) {
+		return cachedData;
+	}
+
+	const definitions = new Map<string, FootnoteDefinition>();
+	const references: FootnoteReference[] = [];
+	const inlineFootnotes: InlineFootnoteInfo[] = [];
+	const referencesByPos = new Map<number, FootnoteReference>();
+	const inlineByPos = new Map<number, InlineFootnoteInfo>();
+	const definitionByPos = new Map<number, FootnoteDefinition>();
+	const firstRefById = new Map<string, FootnoteReference>();
+	const allRanges: RangeTuple[] = [];
+	const seenIds = new Map<string, number>();
+	let inlineIndex = 0;
+
+	syntaxTree(state).iterate({
+		enter: ({ type, from, to, node }) => {
+			if (type.name === 'FootnoteDefinition') {
+				const labelNode = node.getChild('FootnoteDefinitionLabel');
+				const contentNode = node.getChild('FootnoteDefinitionContent');
+
+				if (labelNode) {
+					const id = state.sliceDoc(labelNode.from, labelNode.to);
+					const content = contentNode
+						? state.sliceDoc(contentNode.from, contentNode.to).trim()
+						: '';
+
+					const def: FootnoteDefinition = { id, content, from, to };
+					definitions.set(id, def);
+					definitionByPos.set(from, def);
+					allRanges.push([from, to]);
+				}
+			} else if (type.name === 'FootnoteReference') {
+				const labelNode = node.getChild('FootnoteReferenceLabel');
+
+				if (labelNode) {
+					const id = state.sliceDoc(labelNode.from, labelNode.to);
+
+					if (!seenIds.has(id)) {
+						seenIds.set(id, seenIds.size + 1);
+					}
+
+					const ref: FootnoteReference = {
+						id,
+						from,
+						to,
+						index: seenIds.get(id)!,
+					};
+
+					references.push(ref);
+					referencesByPos.set(from, ref);
+					allRanges.push([from, to]);
+
+					if (!firstRefById.has(id)) {
+						firstRefById.set(id, ref);
+					}
+				}
+			} else if (type.name === 'InlineFootnote') {
+				const contentNode = node.getChild('InlineFootnoteContent');
+
+				if (contentNode) {
+					const content = state.sliceDoc(contentNode.from, contentNode.to).trim();
+					inlineIndex++;
+
+					const info: InlineFootnoteInfo = {
+						content,
+						from,
+						to,
+						index: inlineIndex,
+					};
+
+					inlineFootnotes.push(info);
+					inlineByPos.set(from, info);
+					allRanges.push([from, to]);
+				}
+			}
+		},
+	});
+
+	cachedData = {
+		definitions,
+		references,
+		inlineFootnotes,
+		referencesByPos,
+		inlineByPos,
+		definitionByPos,
+		firstRefById,
+		allRanges,
+	};
+	cachedDocLength = state.doc.length;
+
+	return cachedData;
+}
+
+// ============================================================================
+// Widgets
+// ============================================================================
+
+class FootnoteRefWidget extends WidgetType {
+	constructor(
+		readonly id: string,
+		readonly index: number,
+		readonly hasDefinition: boolean
+	) {
+		super();
+	}
+
+	toDOM(): HTMLElement {
+		const span = document.createElement('span');
+		span.className = 'cm-footnote-ref';
+		span.textContent = `[${this.index}]`;
+		span.dataset.footnoteId = this.id;
+
+		if (!this.hasDefinition) {
+			span.classList.add('cm-footnote-ref-undefined');
+		}
+
+		return span;
+	}
+
+	eq(other: FootnoteRefWidget): boolean {
+		return this.id === other.id && this.index === other.index;
+	}
+
+	ignoreEvent(): boolean {
+		return false;
+	}
+}
+
+class InlineFootnoteWidget extends WidgetType {
+	constructor(
+		readonly content: string,
+		readonly index: number
+	) {
+		super();
+	}
+
+	toDOM(): HTMLElement {
+		const span = document.createElement('span');
+		span.className = 'cm-inline-footnote-ref';
+		span.textContent = `[${this.index}]`;
+		span.dataset.footnoteContent = this.content;
+		span.dataset.footnoteIndex = String(this.index);
+
+		return span;
+	}
+
+	eq(other: InlineFootnoteWidget): boolean {
+		return this.content === other.content && this.index === other.index;
+	}
+
+	ignoreEvent(): boolean {
+		return false;
+	}
+}
+
+class FootnoteDefLabelWidget extends WidgetType {
+	constructor(readonly id: string) {
+		super();
+	}
+
+	toDOM(): HTMLElement {
+		const span = document.createElement('span');
+		span.className = 'cm-footnote-def-label';
+		span.textContent = `[${this.id}]`;
+		span.dataset.footnoteId = this.id;
+		return span;
+	}
+
+	eq(other: FootnoteDefLabelWidget): boolean {
+		return this.id === other.id;
+	}
+
+	ignoreEvent(): boolean {
+		return false;
+	}
+}
+
+// ============================================================================
+// Cursor Detection
+// ============================================================================
+
+/**
+ * Get which footnote range the cursor is in (returns start position, -1 if none).
+ */
+function getCursorFootnotePos(ranges: RangeTuple[], selFrom: number, selTo: number): number {
+	const selRange: RangeTuple = [selFrom, selTo];
+	
+	for (const range of ranges) {
+		if (checkRangeOverlap(range, selRange)) {
+			return range[0];
+		}
+	}
+	return -1;
+}
+
+// ============================================================================
+// Decorations
+// ============================================================================
+
+/**
+ * Build decorations using RangeSetBuilder.
+ */
+function buildDecorations(view: EditorView, data: FootnoteData): DecorationSet {
+	const builder = new RangeSetBuilder<Decoration>();
+	const items: { pos: number; endPos?: number; deco: Decoration; priority?: number }[] = [];
+	const { from: selFrom, to: selTo } = view.state.selection.main;
+	const selRange: RangeTuple = [selFrom, selTo];
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo, node }) => {
+				const inCursor = checkRangeOverlap([nodeFrom, nodeTo], selRange);
+
+				// Footnote References
+				if (type.name === 'FootnoteReference') {
+					const labelNode = node.getChild('FootnoteReferenceLabel');
+					const marks = node.getChildren('FootnoteReferenceMark');
+
+					if (!labelNode || marks.length < 2) return;
+
+					const id = view.state.sliceDoc(labelNode.from, labelNode.to);
+					const ref = data.referencesByPos.get(nodeFrom);
+
+					if (!inCursor && ref && ref.id === id) {
+						items.push({ pos: nodeFrom, endPos: nodeTo, deco: invisibleDecoration });
+						items.push({
+							pos: nodeTo,
+							deco: Decoration.widget({
+								widget: new FootnoteRefWidget(id, ref.index, data.definitions.has(id)),
+								side: 1,
+							}),
+							priority: 1
+						});
+					}
+				}
+
+				// Footnote Definitions
+				if (type.name === 'FootnoteDefinition') {
+					const marks = node.getChildren('FootnoteDefinitionMark');
+					const labelNode = node.getChild('FootnoteDefinitionLabel');
+
+					if (!inCursor && marks.length >= 2 && labelNode) {
+						const id = view.state.sliceDoc(labelNode.from, labelNode.to);
+						
+						items.push({ pos: marks[0].from, endPos: marks[1].to, deco: invisibleDecoration });
+						items.push({
+							pos: marks[1].to,
+							deco: Decoration.widget({
+								widget: new FootnoteDefLabelWidget(id),
+								side: 1,
+							}),
+							priority: 1
+						});
+					}
+				}
+
+				// Inline Footnotes
+				if (type.name === 'InlineFootnote') {
+					const contentNode = node.getChild('InlineFootnoteContent');
+					const marks = node.getChildren('InlineFootnoteMark');
+
+					if (!contentNode || marks.length < 2) return;
+
+					const inlineNote = data.inlineByPos.get(nodeFrom);
+
+					if (!inCursor && inlineNote) {
+						items.push({ pos: nodeFrom, endPos: nodeTo, deco: invisibleDecoration });
+						items.push({
+							pos: nodeTo,
+							deco: Decoration.widget({
+								widget: new InlineFootnoteWidget(inlineNote.content, inlineNote.index),
+								side: 1,
+							}),
+							priority: 1
+						});
+					}
+				}
+			},
+		});
+	}
+
+	// Sort by position, widgets after replace at same position
+	items.sort((a, b) => {
+		if (a.pos !== b.pos) return a.pos - b.pos;
+		return (a.priority || 0) - (b.priority || 0);
+	});
+
+	for (const item of items) {
+		if (item.endPos !== undefined) {
+			builder.add(item.pos, item.endPos, item.deco);
+		} else {
+			builder.add(item.pos, item.pos, item.deco);
+		}
+	}
+
+	return builder.finish();
+}
+
+// ============================================================================
+// Plugin
+// ============================================================================
+
+class FootnotePlugin {
+	decorations: DecorationSet;
+	private data: FootnoteData;
+	private cursorFootnotePos = -1;
+
+	constructor(view: EditorView) {
+		this.data = collectFootnotes(view.state);
+		const { from, to } = view.state.selection.main;
+		this.cursorFootnotePos = getCursorFootnotePos(this.data.allRanges, from, to);
+		this.decorations = buildDecorations(view, this.data);
+	}
+
+	update(update: ViewUpdate) {
+		const { docChanged, viewportChanged, selectionSet } = update;
+
+		if (docChanged) {
+			// Invalidate cache on doc change
+			cachedData = null;
+			this.data = collectFootnotes(update.state);
+			const { from, to } = update.state.selection.main;
+			this.cursorFootnotePos = getCursorFootnotePos(this.data.allRanges, from, to);
+			this.decorations = buildDecorations(update.view, this.data);
+			return;
+		}
+
+		if (viewportChanged) {
+			this.decorations = buildDecorations(update.view, this.data);
+			return;
+		}
+
+		if (selectionSet) {
+			const { from, to } = update.state.selection.main;
+			const newPos = getCursorFootnotePos(this.data.allRanges, from, to);
+
+			if (newPos !== this.cursorFootnotePos) {
+				this.cursorFootnotePos = newPos;
+				this.decorations = buildDecorations(update.view, this.data);
+			}
+		}
+	}
+}
+
+const footnotePlugin = ViewPlugin.fromClass(FootnotePlugin, {
+	decorations: (v) => v.decorations,
+});
+
+// ============================================================================
+// Hover Tooltip
+// ============================================================================
+
+const footnoteHoverTooltip = hoverTooltip(
+	(view, pos): Tooltip | null => {
+		const data = collectFootnotes(view.state);
+
+		// Check widget elements first
+		const coords = view.coordsAtPos(pos);
+		if (coords) {
+			const target = document.elementFromPoint(coords.left, coords.top) as HTMLElement | null;
+
+			if (target?.classList.contains('cm-footnote-ref')) {
+				const id = target.dataset.footnoteId;
+				if (id) {
+					const def = data.definitions.get(id);
+					if (def) {
+						return {
+							pos,
+							above: true,
+							arrow: true,
+							create: () => createTooltipDom(id, def.content),
+						};
+					}
+				}
+			}
+
+			if (target?.classList.contains('cm-inline-footnote-ref')) {
+				const content = target.dataset.footnoteContent;
+				const index = target.dataset.footnoteIndex;
+				if (content && index) {
+					return {
+						pos,
+						above: true,
+						arrow: true,
+						create: () => createInlineTooltipDom(parseInt(index), content),
+					};
+				}
+			}
+		}
+
+		// Check by position using indexed data
+		const ref = data.referencesByPos.get(pos);
+		if (ref) {
+			const def = data.definitions.get(ref.id);
+			if (def) {
+				return {
+					pos: ref.to,
+					above: true,
+					arrow: true,
+					create: () => createTooltipDom(ref.id, def.content),
+				};
+			}
+		}
+
+		const inline = data.inlineByPos.get(pos);
+		if (inline) {
+			return {
+				pos: inline.to,
+				above: true,
+				arrow: true,
+				create: () => createInlineTooltipDom(inline.index, inline.content),
+			};
+		}
+
+		// Fallback: check if pos is within any footnote range
+		for (const ref of data.references) {
+			if (pos >= ref.from && pos <= ref.to) {
+				const def = data.definitions.get(ref.id);
+				if (def) {
+					return {
+						pos: ref.to,
+						above: true,
+						arrow: true,
+						create: () => createTooltipDom(ref.id, def.content),
+					};
+				}
+			}
+		}
+
+		for (const inline of data.inlineFootnotes) {
+			if (pos >= inline.from && pos <= inline.to) {
+				return {
+					pos: inline.to,
+					above: true,
+					arrow: true,
+					create: () => createInlineTooltipDom(inline.index, inline.content),
+				};
+			}
+		}
+
+		return null;
+	},
+	{ hoverTime: 300 }
+);
+
+function createTooltipDom(id: string, content: string): { dom: HTMLElement } {
+	const dom = document.createElement('div');
+	dom.className = 'cm-footnote-tooltip';
+
+	const header = document.createElement('div');
+	header.className = 'cm-footnote-tooltip-header';
+	header.textContent = `[^${id}]`;
+
+	const body = document.createElement('div');
+	body.className = 'cm-footnote-tooltip-body';
+	body.textContent = content || '(Empty footnote)';
+
+	dom.appendChild(header);
+	dom.appendChild(body);
+
+	return { dom };
+}
+
+function createInlineTooltipDom(index: number, content: string): { dom: HTMLElement } {
+	const dom = document.createElement('div');
+	dom.className = 'cm-footnote-tooltip';
+
+	const header = document.createElement('div');
+	header.className = 'cm-footnote-tooltip-header';
+	header.textContent = `Inline Footnote [${index}]`;
+
+	const body = document.createElement('div');
+	body.className = 'cm-footnote-tooltip-body';
+	body.textContent = content || '(Empty footnote)';
+
+	dom.appendChild(header);
+	dom.appendChild(body);
+
+	return { dom };
+}
+
+// ============================================================================
+// Click Handler
+// ============================================================================
+
+const footnoteClickHandler = EditorView.domEventHandlers({
+	mousedown(event, view) {
+		const target = event.target as HTMLElement;
+
+		// Click on footnote reference → jump to definition
+		if (target.classList.contains('cm-footnote-ref')) {
+			const id = target.dataset.footnoteId;
+			if (id) {
+				const data = collectFootnotes(view.state);
+				const def = data.definitions.get(id);
+				if (def) {
+					event.preventDefault();
+					setTimeout(() => {
+						view.dispatch({
+							selection: { anchor: def.from },
+							scrollIntoView: true,
+						});
+						view.focus();
+					}, 0);
+					return true;
+				}
+			}
+		}
+
+		// Click on definition label → jump to first reference
+		if (target.classList.contains('cm-footnote-def-label')) {
+			const id = target.dataset.footnoteId;
+			if (id) {
+				const data = collectFootnotes(view.state);
+				const firstRef = data.firstRefById.get(id);
+				if (firstRef) {
+					event.preventDefault();
+					setTimeout(() => {
+						view.dispatch({
+							selection: { anchor: firstRef.from },
+							scrollIntoView: true,
+						});
+						view.focus();
+					}, 0);
+					return true;
+				}
+			}
+		}
+
+		return false;
+	},
+});
+
+// ============================================================================
+// Theme
+// ============================================================================
+
+const baseTheme = EditorView.baseTheme({
+	'.cm-footnote-ref': {
+		display: 'inline-flex',
+		alignItems: 'center',
+		justifyContent: 'center',
+		minWidth: '1em',
+		height: '1.2em',
+		padding: '0 0.25em',
+		marginLeft: '1px',
+		fontSize: '0.75em',
+		fontWeight: '500',
+		lineHeight: '1',
+		verticalAlign: 'super',
+		color: 'var(--cm-footnote-color, #1a73e8)',
+		backgroundColor: 'var(--cm-footnote-bg, rgba(26, 115, 232, 0.1))',
+		borderRadius: '3px',
+		cursor: 'pointer',
+		transition: 'all 0.15s ease',
+		textDecoration: 'none',
+	},
+	'.cm-footnote-ref:hover': {
+		color: 'var(--cm-footnote-hover-color, #1557b0)',
+		backgroundColor: 'var(--cm-footnote-hover-bg, rgba(26, 115, 232, 0.2))',
+	},
+	'.cm-footnote-ref-undefined': {
+		color: 'var(--cm-footnote-undefined-color, #d93025)',
+		backgroundColor: 'var(--cm-footnote-undefined-bg, rgba(217, 48, 37, 0.1))',
+	},
+
+	'.cm-inline-footnote-ref': {
+		display: 'inline-flex',
+		alignItems: 'center',
+		justifyContent: 'center',
+		minWidth: '1em',
+		height: '1.2em',
+		padding: '0 0.25em',
+		marginLeft: '1px',
+		fontSize: '0.75em',
+		fontWeight: '500',
+		lineHeight: '1',
+		verticalAlign: 'super',
+		color: 'var(--cm-inline-footnote-color, #e67e22)',
+		backgroundColor: 'var(--cm-inline-footnote-bg, rgba(230, 126, 34, 0.1))',
+		borderRadius: '3px',
+		cursor: 'pointer',
+		transition: 'all 0.15s ease',
+		textDecoration: 'none',
+	},
+	'.cm-inline-footnote-ref:hover': {
+		color: 'var(--cm-inline-footnote-hover-color, #d35400)',
+		backgroundColor: 'var(--cm-inline-footnote-hover-bg, rgba(230, 126, 34, 0.2))',
+	},
+
+	'.cm-footnote-def-label': {
+		color: 'var(--cm-footnote-def-color, #1a73e8)',
+		fontWeight: '600',
+		cursor: 'pointer',
+	},
+	'.cm-footnote-def-label:hover': {
+		textDecoration: 'underline',
+	},
+
+	'.cm-footnote-tooltip': {
+		maxWidth: '400px',
+		padding: '0',
+		backgroundColor: 'var(--bg-secondary)',
+		border: '1px solid var(--border-color)',
+		boxShadow: '0 4px 12px rgba(0, 0, 0, 0.15)',
+		overflow: 'hidden',
+	},
+	'.cm-footnote-tooltip-header': {
+		padding: '6px 12px',
+		fontSize: '0.8em',
+		fontWeight: '600',
+		fontFamily: 'monospace',
+		color: 'var(--cm-footnote-color, #1a73e8)',
+		backgroundColor: 'var(--bg-tertiary, rgba(0, 0, 0, 0.05))',
+		borderBottom: '1px solid var(--border-color)',
+	},
+	'.cm-footnote-tooltip-body': {
+		padding: '10px 12px',
+		fontSize: '0.9em',
+		lineHeight: '1.5',
+		color: 'var(--text-primary)',
+		whiteSpace: 'pre-wrap',
+		wordBreak: 'break-word',
+	},
+
+	'.cm-tooltip:has(.cm-footnote-tooltip)': {
+		animation: 'cm-footnote-fade-in 0.15s ease-out',
+	},
+	'@keyframes cm-footnote-fade-in': {
+		from: { opacity: '0', transform: 'translateY(4px)' },
+		to: { opacity: '1', transform: 'translateY(0)' },
+	},
+});
+
+// ============================================================================
+// Export
+// ============================================================================
+
+/**
+ * Footnote extension.
+ */
+export const footnote = (): Extension => [
+	footnotePlugin,
+	footnoteHoverTooltip,
+	footnoteClickHandler,
+	baseTheme,
+];
+
+export default footnote;
+
+/**
+ * Get footnote data for external use.
+ */
+export function getFootnoteData(state: EditorState): FootnoteData {
+	return collectFootnotes(state);
+}

frontend/src/views/editor/extensions/markdown/plugins/heading.ts

@@ -0,0 +1,168 @@
+import { syntaxTree } from '@codemirror/language';
+import { Extension, RangeSetBuilder } from '@codemirror/state';
+import {
+	Decoration,
+	DecorationSet,
+	EditorView,
+	ViewPlugin,
+	ViewUpdate
+} from '@codemirror/view';
+import { checkRangeOverlap, RangeTuple } from '../util';
+
+/** Hidden mark decoration */
+const hiddenMarkDecoration = Decoration.mark({
+	class: 'cm-heading-mark-hidden'
+});
+
+/**
+ * Collect all heading ranges in visible viewport.
+ */
+function collectHeadingRanges(view: EditorView): RangeTuple[] {
+	const ranges: RangeTuple[] = [];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter(node) {
+				if (!node.type.name.startsWith('ATXHeading') && 
+					!node.type.name.startsWith('SetextHeading')) {
+					return;
+				}
+				if (seen.has(node.from)) return;
+				seen.add(node.from);
+				ranges.push([node.from, node.to]);
+			}
+		});
+	}
+
+	return ranges;
+}
+
+/**
+ * Get which heading the cursor is in (-1 if none).
+ */
+function getCursorHeadingPos(ranges: RangeTuple[], selFrom: number, selTo: number): number {
+	const selRange: RangeTuple = [selFrom, selTo];
+	
+	for (const range of ranges) {
+		if (checkRangeOverlap(range, selRange)) {
+			return range[0];
+		}
+	}
+	return -1;
+}
+
+/**
+ * Build heading decorations using RangeSetBuilder.
+ */
+function buildDecorations(view: EditorView): DecorationSet {
+	const builder = new RangeSetBuilder<Decoration>();
+	const items: { from: number; to: number }[] = [];
+	const { from: selFrom, to: selTo } = view.state.selection.main;
+	const selRange: RangeTuple = [selFrom, selTo];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter(node) {
+				// Skip if cursor is in this heading
+				if (checkRangeOverlap([node.from, node.to], selRange)) return;
+
+				// ATX headings (# Heading)
+				if (node.type.name.startsWith('ATXHeading')) {
+					if (seen.has(node.from)) return;
+					seen.add(node.from);
+
+					const header = node.node.firstChild;
+					if (header && header.type.name === 'HeaderMark') {
+						const markFrom = header.from;
+						// Include the space after #
+						const markTo = Math.min(header.to + 1, node.to);
+						items.push({ from: markFrom, to: markTo });
+					}
+				}
+				// Setext headings (underline style)
+				else if (node.type.name.startsWith('SetextHeading')) {
+					if (seen.has(node.from)) return;
+					seen.add(node.from);
+
+					const cursor = node.node.cursor();
+					cursor.iterate((child) => {
+						if (child.type.name === 'HeaderMark') {
+							items.push({ from: child.from, to: child.to });
+						}
+					});
+				}
+			}
+		});
+	}
+
+	// Sort by position and add to builder
+	items.sort((a, b) => a.from - b.from);
+	
+	for (const item of items) {
+		builder.add(item.from, item.to, hiddenMarkDecoration);
+	}
+
+	return builder.finish();
+}
+
+/**
+ * Heading plugin with optimized updates.
+ */
+class HeadingPlugin {
+	decorations: DecorationSet;
+	private headingRanges: RangeTuple[] = [];
+	private cursorHeadingPos = -1;
+
+	constructor(view: EditorView) {
+		this.headingRanges = collectHeadingRanges(view);
+		const { from, to } = view.state.selection.main;
+		this.cursorHeadingPos = getCursorHeadingPos(this.headingRanges, from, to);
+		this.decorations = buildDecorations(view);
+	}
+
+	update(update: ViewUpdate) {
+		const { docChanged, viewportChanged, selectionSet } = update;
+
+		if (docChanged || viewportChanged) {
+			this.headingRanges = collectHeadingRanges(update.view);
+			const { from, to } = update.state.selection.main;
+			this.cursorHeadingPos = getCursorHeadingPos(this.headingRanges, from, to);
+			this.decorations = buildDecorations(update.view);
+			return;
+		}
+
+		if (selectionSet) {
+			const { from, to } = update.state.selection.main;
+			const newPos = getCursorHeadingPos(this.headingRanges, from, to);
+
+			if (newPos !== this.cursorHeadingPos) {
+				this.cursorHeadingPos = newPos;
+				this.decorations = buildDecorations(update.view);
+			}
+		}
+	}
+}
+
+const headingPlugin = ViewPlugin.fromClass(HeadingPlugin, {
+	decorations: (v) => v.decorations
+});
+
+/**
+ * Theme for hidden heading marks.
+ */
+const headingTheme = EditorView.baseTheme({
+	'.cm-heading-mark-hidden': {
+		fontSize: '0'
+	}
+});
+
+/**
+ * Headings plugin.
+ */
+export const headings = (): Extension => [headingPlugin, headingTheme];

frontend/src/views/editor/extensions/markdown/plugins/hide-mark.ts

@@ -0,0 +1,167 @@
+import {
+	Decoration,
+	DecorationSet,
+	EditorView,
+	ViewPlugin,
+	ViewUpdate
+} from '@codemirror/view';
+import { Extension, RangeSetBuilder } from '@codemirror/state';
+import { syntaxTree } from '@codemirror/language';
+import { checkRangeOverlap, invisibleDecoration, RangeTuple } from '../util';
+
+/**
+ * Node types that contain markers to hide.
+ * Note: InlineCode is handled by inline-code.ts
+ */
+const TYPES_WITH_MARKS = new Set([
+	'Emphasis',
+	'StrongEmphasis',
+	'Strikethrough'
+]);
+
+/**
+ * Marker node types to hide.
+ */
+const MARK_TYPES = new Set([
+	'EmphasisMark',
+	'StrikethroughMark'
+]);
+
+// Export for external use
+export const typesWithMarks = Array.from(TYPES_WITH_MARKS);
+export const markTypes = Array.from(MARK_TYPES);
+
+/**
+ * Collect all mark ranges in visible viewport.
+ */
+function collectMarkRanges(view: EditorView): RangeTuple[] {
+	const ranges: RangeTuple[] = [];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo }) => {
+				if (!TYPES_WITH_MARKS.has(type.name)) return;
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+				ranges.push([nodeFrom, nodeTo]);
+			}
+		});
+	}
+
+	return ranges;
+}
+
+/**
+ * Get which mark range the cursor is in (-1 if none).
+ */
+function getCursorMarkPos(ranges: RangeTuple[], selFrom: number, selTo: number): number {
+	const selRange: RangeTuple = [selFrom, selTo];
+	
+	for (const range of ranges) {
+		if (checkRangeOverlap(range, selRange)) {
+			return range[0];
+		}
+	}
+	return -1;
+}
+
+/**
+ * Build mark hiding decorations.
+ */
+function buildDecorations(view: EditorView): DecorationSet {
+	const builder = new RangeSetBuilder<Decoration>();
+	const items: { from: number; to: number }[] = [];
+	const { from: selFrom, to: selTo } = view.state.selection.main;
+	const selRange: RangeTuple = [selFrom, selTo];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo, node }) => {
+				if (!TYPES_WITH_MARKS.has(type.name)) return;
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+
+				// Skip if cursor is in this range
+				if (checkRangeOverlap([nodeFrom, nodeTo], selRange)) return;
+
+				// Collect mark positions
+				const innerTree = node.toTree();
+				innerTree.iterate({
+					enter({ type: markType, from: markFrom, to: markTo }) {
+						if (!MARK_TYPES.has(markType.name)) return;
+						items.push({
+							from: nodeFrom + markFrom,
+							to: nodeFrom + markTo
+						});
+					}
+				});
+			}
+		});
+	}
+
+	// Sort and add to builder
+	items.sort((a, b) => a.from - b.from);
+	
+	for (const item of items) {
+		builder.add(item.from, item.to, invisibleDecoration);
+	}
+
+	return builder.finish();
+}
+
+/**
+ * Hide marks plugin with optimized updates.
+ * 
+ * Hides emphasis marks (*, **, ~~) when cursor is outside.
+ * Note: InlineCode backticks are handled by inline-code.ts
+ */
+class HideMarkPlugin {
+	decorations: DecorationSet;
+	private markRanges: RangeTuple[] = [];
+	private cursorMarkPos = -1;
+
+	constructor(view: EditorView) {
+		this.markRanges = collectMarkRanges(view);
+		const { from, to } = view.state.selection.main;
+		this.cursorMarkPos = getCursorMarkPos(this.markRanges, from, to);
+		this.decorations = buildDecorations(view);
+	}
+
+	update(update: ViewUpdate) {
+		const { docChanged, viewportChanged, selectionSet } = update;
+
+		if (docChanged || viewportChanged) {
+			this.markRanges = collectMarkRanges(update.view);
+			const { from, to } = update.state.selection.main;
+			this.cursorMarkPos = getCursorMarkPos(this.markRanges, from, to);
+			this.decorations = buildDecorations(update.view);
+			return;
+		}
+
+		if (selectionSet) {
+			const { from, to } = update.state.selection.main;
+			const newPos = getCursorMarkPos(this.markRanges, from, to);
+
+			if (newPos !== this.cursorMarkPos) {
+				this.cursorMarkPos = newPos;
+				this.decorations = buildDecorations(update.view);
+			}
+		}
+	}
+}
+
+/**
+ * Hide marks plugin.
+ * Hides marks for emphasis, strong, and strikethrough.
+ */
+export const hideMarks = (): Extension => [
+	ViewPlugin.fromClass(HideMarkPlugin, {
+		decorations: (v) => v.decorations
+	})
+];

frontend/src/views/editor/extensions/markdown/plugins/highlight.ts

@@ -0,0 +1,160 @@
+import { Extension, RangeSetBuilder } from '@codemirror/state';
+import { syntaxTree } from '@codemirror/language';
+import {
+	ViewPlugin,
+	DecorationSet,
+	Decoration,
+	EditorView,
+	ViewUpdate
+} from '@codemirror/view';
+import { checkRangeOverlap, invisibleDecoration, RangeTuple } from '../util';
+
+/** Mark decoration for highlighted content */
+const highlightMarkDecoration = Decoration.mark({ class: 'cm-highlight' });
+
+/**
+ * Highlight plugin using syntax tree.
+ *
+ * Detects ==text== and renders as highlighted text.
+ */
+export const highlight = (): Extension => [highlightPlugin, baseTheme];
+
+/**
+ * Collect all highlight ranges in visible viewport.
+ */
+function collectHighlightRanges(view: EditorView): RangeTuple[] {
+	const ranges: RangeTuple[] = [];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo }) => {
+				if (type.name !== 'Highlight') return;
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+				ranges.push([nodeFrom, nodeTo]);
+			}
+		});
+	}
+
+	return ranges;
+}
+
+/**
+ * Get which highlight the cursor is in (-1 if none).
+ */
+function getCursorHighlightPos(ranges: RangeTuple[], selFrom: number, selTo: number): number {
+	const selRange: RangeTuple = [selFrom, selTo];
+	
+	for (const range of ranges) {
+		if (checkRangeOverlap(range, selRange)) {
+			return range[0];
+		}
+	}
+	return -1;
+}
+
+/**
+ * Build highlight decorations.
+ */
+function buildDecorations(view: EditorView): DecorationSet {
+	const builder = new RangeSetBuilder<Decoration>();
+	const items: { from: number; to: number; deco: Decoration }[] = [];
+	const { from: selFrom, to: selTo } = view.state.selection.main;
+	const selRange: RangeTuple = [selFrom, selTo];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo, node }) => {
+				if (type.name !== 'Highlight') return;
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+
+				// Skip if cursor is in this highlight
+				if (checkRangeOverlap([nodeFrom, nodeTo], selRange)) return;
+
+				const marks = node.getChildren('HighlightMark');
+				if (marks.length < 2) return;
+
+				// Hide opening ==
+				items.push({ from: marks[0].from, to: marks[0].to, deco: invisibleDecoration });
+
+				// Apply highlight style to content
+				const contentStart = marks[0].to;
+				const contentEnd = marks[marks.length - 1].from;
+				if (contentStart < contentEnd) {
+					items.push({ from: contentStart, to: contentEnd, deco: highlightMarkDecoration });
+				}
+
+				// Hide closing ==
+				items.push({ from: marks[marks.length - 1].from, to: marks[marks.length - 1].to, deco: invisibleDecoration });
+			}
+		});
+	}
+
+	// Sort and add to builder
+	items.sort((a, b) => a.from - b.from);
+	
+	for (const item of items) {
+		builder.add(item.from, item.to, item.deco);
+	}
+
+	return builder.finish();
+}
+
+/**
+ * Highlight plugin with optimized updates.
+ */
+class HighlightPlugin {
+	decorations: DecorationSet;
+	private highlightRanges: RangeTuple[] = [];
+	private cursorHighlightPos = -1;
+
+	constructor(view: EditorView) {
+		this.highlightRanges = collectHighlightRanges(view);
+		const { from, to } = view.state.selection.main;
+		this.cursorHighlightPos = getCursorHighlightPos(this.highlightRanges, from, to);
+		this.decorations = buildDecorations(view);
+	}
+
+	update(update: ViewUpdate) {
+		const { docChanged, viewportChanged, selectionSet } = update;
+
+		if (docChanged || viewportChanged) {
+			this.highlightRanges = collectHighlightRanges(update.view);
+			const { from, to } = update.state.selection.main;
+			this.cursorHighlightPos = getCursorHighlightPos(this.highlightRanges, from, to);
+			this.decorations = buildDecorations(update.view);
+			return;
+		}
+
+		if (selectionSet) {
+			const { from, to } = update.state.selection.main;
+			const newPos = getCursorHighlightPos(this.highlightRanges, from, to);
+
+			if (newPos !== this.cursorHighlightPos) {
+				this.cursorHighlightPos = newPos;
+				this.decorations = buildDecorations(update.view);
+			}
+		}
+	}
+}
+
+const highlightPlugin = ViewPlugin.fromClass(HighlightPlugin, {
+	decorations: (v) => v.decorations
+});
+
+/**
+ * Base theme for highlight.
+ */
+const baseTheme = EditorView.baseTheme({
+	'.cm-highlight': {
+		backgroundColor: 'var(--cm-highlight-background, rgba(255, 235, 59, 0.4))',
+		borderRadius: '2px',
+	}
+});

frontend/src/views/editor/extensions/markdown/plugins/horizontal-rule.ts

@@ -0,0 +1,182 @@
+import { Extension, RangeSetBuilder } from '@codemirror/state';
+import {
+	DecorationSet,
+	Decoration,
+	EditorView,
+	ViewPlugin,
+	ViewUpdate,
+	WidgetType
+} from '@codemirror/view';
+import { checkRangeOverlap, RangeTuple } from '../util';
+import { syntaxTree } from '@codemirror/language';
+
+/**
+ * Horizontal rule plugin that renders beautiful horizontal lines.
+ *
+ * Features:
+ * - Replaces markdown horizontal rules (---, ***, ___) with styled <hr> elements
+ * - Shows the original text when cursor is on the line
+ * - Uses inline widget to avoid affecting block system boundaries
+ */
+export const horizontalRule = (): Extension => [horizontalRulePlugin, baseTheme];
+
+/**
+ * Widget to display a horizontal rule.
+ */
+class HorizontalRuleWidget extends WidgetType {
+	toDOM(): HTMLElement {
+		const span = document.createElement('span');
+		span.className = 'cm-horizontal-rule-widget';
+		
+		const hr = document.createElement('hr');
+		hr.className = 'cm-horizontal-rule';
+		span.appendChild(hr);
+		
+		return span;
+	}
+
+	eq(_other: HorizontalRuleWidget) {
+		return true;
+	}
+
+	ignoreEvent(): boolean {
+		return false;
+	}
+}
+
+/** Shared widget instance (all HR widgets are identical) */
+const hrWidget = new HorizontalRuleWidget();
+
+/**
+ * Collect all horizontal rule ranges in visible viewport.
+ */
+function collectHRRanges(view: EditorView): RangeTuple[] {
+	const ranges: RangeTuple[] = [];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo }) => {
+				if (type.name !== 'HorizontalRule') return;
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+				ranges.push([nodeFrom, nodeTo]);
+			}
+		});
+	}
+
+	return ranges;
+}
+
+/**
+ * Get which HR the cursor is in (-1 if none).
+ */
+function getCursorHRPos(ranges: RangeTuple[], selFrom: number, selTo: number): number {
+	const selRange: RangeTuple = [selFrom, selTo];
+	
+	for (const range of ranges) {
+		if (checkRangeOverlap(range, selRange)) {
+			return range[0];
+		}
+	}
+	return -1;
+}
+
+/**
+ * Build horizontal rule decorations.
+ */
+function buildDecorations(view: EditorView): DecorationSet {
+	const builder = new RangeSetBuilder<Decoration>();
+	const items: { from: number; to: number }[] = [];
+	const { from: selFrom, to: selTo } = view.state.selection.main;
+	const selRange: RangeTuple = [selFrom, selTo];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo }) => {
+				if (type.name !== 'HorizontalRule') return;
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+
+				// Skip if cursor is on this HR
+				if (checkRangeOverlap([nodeFrom, nodeTo], selRange)) return;
+
+				items.push({ from: nodeFrom, to: nodeTo });
+			}
+		});
+	}
+
+	// Sort and add to builder
+	items.sort((a, b) => a.from - b.from);
+	
+	for (const item of items) {
+		builder.add(item.from, item.to, Decoration.replace({ widget: hrWidget }));
+	}
+
+	return builder.finish();
+}
+
+/**
+ * Horizontal rule plugin with optimized updates.
+ */
+class HorizontalRulePlugin {
+	decorations: DecorationSet;
+	private hrRanges: RangeTuple[] = [];
+	private cursorHRPos = -1;
+
+	constructor(view: EditorView) {
+		this.hrRanges = collectHRRanges(view);
+		const { from, to } = view.state.selection.main;
+		this.cursorHRPos = getCursorHRPos(this.hrRanges, from, to);
+		this.decorations = buildDecorations(view);
+	}
+
+	update(update: ViewUpdate) {
+		const { docChanged, viewportChanged, selectionSet } = update;
+
+		if (docChanged || viewportChanged) {
+			this.hrRanges = collectHRRanges(update.view);
+			const { from, to } = update.state.selection.main;
+			this.cursorHRPos = getCursorHRPos(this.hrRanges, from, to);
+			this.decorations = buildDecorations(update.view);
+			return;
+		}
+
+		if (selectionSet) {
+			const { from, to } = update.state.selection.main;
+			const newPos = getCursorHRPos(this.hrRanges, from, to);
+
+			if (newPos !== this.cursorHRPos) {
+				this.cursorHRPos = newPos;
+				this.decorations = buildDecorations(update.view);
+			}
+		}
+	}
+}
+
+const horizontalRulePlugin = ViewPlugin.fromClass(HorizontalRulePlugin, {
+	decorations: (v) => v.decorations
+});
+
+/**
+ * Base theme for horizontal rules.
+ */
+const baseTheme = EditorView.baseTheme({
+	'.cm-horizontal-rule-widget': {
+		display: 'inline-block',
+		width: '100%',
+		verticalAlign: 'middle'
+	},
+	'.cm-horizontal-rule': {
+		width: '100%',
+		height: '0',
+		border: 'none',
+		borderTop: '2px solid var(--cm-hr-color, rgba(128, 128, 128, 0.3))',
+		margin: '0.5em 0'
+	}
+});

frontend/src/views/editor/extensions/markdown/plugins/html.ts

@@ -0,0 +1,348 @@
+/**
+ * HTML plugin for CodeMirror.
+ *
+ * Features:
+ * - Identifies HTML blocks and tags (excluding those inside tables)
+ * - Shows indicator icon at the end
+ * - Click to preview rendered HTML
+ */
+
+import { syntaxTree } from '@codemirror/language';
+import { Extension, Range, StateField, StateEffect, ChangeSet } from '@codemirror/state';
+import {
+	DecorationSet,
+	Decoration,
+	WidgetType,
+	EditorView,
+	ViewPlugin,
+	ViewUpdate,
+	showTooltip,
+	Tooltip
+} from '@codemirror/view';
+import DOMPurify from 'dompurify';
+import { LruCache } from '@/common/utils/lruCache';
+
+interface HTMLBlockInfo {
+	from: number;
+	to: number;
+	content: string;
+	sanitized: string;
+}
+
+// HTML5 official logo
+const HTML_ICON = `<svg viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" width="14" height="14"><path d="M89.088 59.392l62.464 803.84c1.024 12.288 9.216 22.528 20.48 25.6L502.784 993.28c6.144 2.048 12.288 2.048 18.432 0l330.752-104.448c11.264-4.096 19.456-14.336 20.48-25.6l62.464-803.84c1.024-17.408-12.288-31.744-29.696-31.744H118.784c-17.408 0-31.744 14.336-29.696 31.744z" fill="#FC490B"/><path d="M774.144 309.248h-409.6l12.288 113.664h388.096l-25.6 325.632-227.328 71.68-227.328-71.68-13.312-169.984h118.784v82.944l124.928 33.792 123.904-33.792 10.24-132.096H267.264L241.664 204.8h540.672z" fill="#FFFFFF"/></svg>`;
+
+/**
+ * LRU cache for DOMPurify sanitize results.
+ */
+const sanitizeCache = new LruCache<string, string>(100);
+
+/**
+ * Sanitize HTML content with caching for performance.
+ */
+function sanitizeHTML(html: string): string {
+	const cached = sanitizeCache.get(html);
+	if (cached !== undefined) {
+		return cached;
+	}
+	
+	const sanitized = DOMPurify.sanitize(html, {
+		ADD_TAGS: ['img'],
+		ADD_ATTR: ['src', 'alt', 'width', 'height', 'style', 'class', 'loading'],
+		ALLOW_DATA_ATTR: true
+	});
+	
+	sanitizeCache.set(html, sanitized);
+	return sanitized;
+}
+
+/**
+ * Check if document changes affect any of the given regions.
+ */
+function changesAffectRegions(changes: ChangeSet, regions: { from: number; to: number }[]): boolean {
+	if (regions.length === 0) return true;
+	
+	let affected = false;
+	changes.iterChanges((fromA, toA) => {
+		if (affected) return;
+		for (const region of regions) {
+			if (fromA <= region.to && toA >= region.from) {
+				affected = true;
+				return;
+			}
+		}
+	});
+	return affected;
+}
+
+/**
+ * Check if a node is inside a table.
+ */
+function isInsideTable(node: { parent: { type: { name: string }; parent: unknown } | null }): boolean {
+	let current = node.parent;
+	while (current) {
+		const name = current.type.name;
+		if (name === 'Table' || name === 'TableHeader' || name === 'TableRow' || name === 'TableCell') {
+			return true;
+		}
+		current = current.parent as typeof current;
+	}
+	return false;
+}
+
+/**
+ * Extract all HTML blocks from visible ranges.
+ * Excludes HTML inside tables (tables have their own rendering).
+ */
+function extractHTMLBlocks(view: EditorView): HTMLBlockInfo[] {
+	const result: HTMLBlockInfo[] = [];
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: (nodeRef) => {
+				const { name, from: f, to: t, node } = nodeRef;
+
+				// Support both block-level HTML (HTMLBlock) and inline HTML tags (HTMLTag)
+				if (name !== 'HTMLBlock' && name !== 'HTMLTag') return;
+
+				// Skip HTML inside tables
+				if (isInsideTable(node)) return;
+
+				const content = view.state.sliceDoc(f, t);
+				const sanitized = sanitizeHTML(content);
+
+				// Skip empty content after sanitization
+				if (!sanitized.trim()) return;
+
+				result.push({ from: f, to: t, content, sanitized });
+			}
+		});
+	}
+
+	return result;
+}
+
+/** Effect to toggle tooltip visibility */
+const toggleHTMLTooltip = StateEffect.define<HTMLBlockInfo | null>();
+
+/** Effect to close tooltip */
+const closeHTMLTooltip = StateEffect.define<null>();
+
+/** StateField to track active tooltip */
+const htmlTooltipState = StateField.define<HTMLBlockInfo | null>({
+	create: () => null,
+	update(value, tr) {
+		for (const effect of tr.effects) {
+			if (effect.is(toggleHTMLTooltip)) {
+				// Toggle: if same block, close; otherwise open new
+				if (value && effect.value && value.from === effect.value.from) {
+					return null;
+				}
+				return effect.value;
+			}
+			if (effect.is(closeHTMLTooltip)) {
+				return null;
+			}
+		}
+		// Close tooltip on document changes
+		if (tr.docChanged) {
+			return null;
+		}
+		return value;
+	},
+	provide: (field) =>
+		showTooltip.from(field, (block): Tooltip | null => {
+			if (!block) return null;
+			return {
+				pos: block.to,
+				above: true,
+				create: () => {
+					const dom = document.createElement('div');
+					dom.className = 'cm-html-tooltip';
+					dom.innerHTML = block.sanitized;
+
+					// Prevent clicks inside tooltip from closing it
+					dom.addEventListener('click', (e) => {
+						e.stopPropagation();
+					});
+
+					return { dom };
+				}
+			};
+		})
+});
+/**
+ * Indicator widget shown at the end of HTML blocks.
+ * Clicking toggles the tooltip.
+ */
+class HTMLIndicatorWidget extends WidgetType {
+	constructor(readonly info: HTMLBlockInfo) {
+		super();
+	}
+
+	toDOM(view: EditorView): HTMLElement {
+		const el = document.createElement('span');
+		el.className = 'cm-html-indicator';
+		el.innerHTML = HTML_ICON;
+		el.title = 'Click to preview HTML';
+
+		// Click handler to toggle tooltip
+		el.addEventListener('click', (e) => {
+			e.preventDefault();
+			e.stopPropagation();
+			view.dispatch({
+				effects: toggleHTMLTooltip.of(this.info)
+			});
+		});
+
+		return el;
+	}
+
+	eq(other: HTMLIndicatorWidget): boolean {
+		return this.info.from === other.info.from && this.info.content === other.info.content;
+	}
+
+	ignoreEvent(): boolean {
+		return false;
+	}
+}
+
+/**
+ * Plugin to manage HTML block decorations.
+ * Optimized with incremental updates when changes don't affect HTML regions.
+ */
+class HTMLBlockPlugin {
+	decorations: DecorationSet;
+	blocks: HTMLBlockInfo[] = [];
+
+	constructor(view: EditorView) {
+		this.blocks = extractHTMLBlocks(view);
+		this.decorations = this.build();
+	}
+
+	update(update: ViewUpdate) {
+		// Always rebuild on viewport change
+		if (update.viewportChanged) {
+			this.blocks = extractHTMLBlocks(update.view);
+			this.decorations = this.build();
+			return;
+		}
+		
+		// For document changes, only rebuild if changes affect HTML regions
+		if (update.docChanged) {
+			const needsRebuild = changesAffectRegions(update.changes, this.blocks);
+			
+			if (needsRebuild) {
+				this.blocks = extractHTMLBlocks(update.view);
+				this.decorations = this.build();
+			} else {
+				// Just update positions of existing decorations
+				this.decorations = this.decorations.map(update.changes);
+				this.blocks = this.blocks.map(block => ({
+					...block,
+					from: update.changes.mapPos(block.from),
+					to: update.changes.mapPos(block.to)
+				}));
+			}
+		}
+	}
+
+	private build(): DecorationSet {
+		const deco: Range<Decoration>[] = [];
+		for (const block of this.blocks) {
+			deco.push(
+				Decoration.widget({
+					widget: new HTMLIndicatorWidget(block),
+					side: 1
+				}).range(block.to)
+			);
+		}
+		return Decoration.set(deco, true);
+	}
+}
+
+const htmlBlockPlugin = ViewPlugin.fromClass(HTMLBlockPlugin, {
+	decorations: (v) => v.decorations
+});
+
+/**
+ * Close tooltip when clicking outside.
+ */
+const clickOutsideHandler = EditorView.domEventHandlers({
+	click(event, view) {
+		const target = event.target as HTMLElement;
+		
+		// Don't close if clicking on indicator or inside tooltip
+		if (target.closest('.cm-html-indicator') || target.closest('.cm-html-tooltip')) {
+			return false;
+		}
+		
+		// Close tooltip if one is open
+		const currentTooltip = view.state.field(htmlTooltipState);
+		if (currentTooltip) {
+			view.dispatch({
+				effects: closeHTMLTooltip.of(null)
+			});
+		}
+		
+		return false;
+	}
+});
+
+const theme = EditorView.baseTheme({
+	// Indicator icon
+	'.cm-html-indicator': {
+		display: 'inline-flex',
+		alignItems: 'center',
+		marginLeft: '4px',
+		verticalAlign: 'middle',
+		cursor: 'pointer',
+		opacity: '0.5',
+		color: 'var(--cm-html-color, #e44d26)',
+		transition: 'opacity 0.15s',
+		'& svg': { width: '14px', height: '14px' }
+	},
+	'.cm-html-indicator:hover': {
+		opacity: '1'
+	},
+
+	// Tooltip content
+	'.cm-html-tooltip': {
+		padding: '8px 12px',
+		maxWidth: '60vw',
+		maxHeight: '50vh',
+		overflow: 'auto'
+	},
+
+	// Images inside tooltip
+	'.cm-html-tooltip img': {
+		maxWidth: '100%',
+		height: 'auto',
+		display: 'block'
+	},
+
+	// Style the parent tooltip container
+	'.cm-tooltip:has(.cm-html-tooltip)': {
+		background: 'var(--bg-primary, #fff)',
+		border: '1px solid var(--border-color, #ddd)',
+		borderRadius: '4px',
+		boxShadow: '0 4px 12px rgba(0, 0, 0, 0.15)'
+	}
+});
+
+/**
+ * HTML block extension.
+ *
+ * Features:
+ * - Identifies HTML blocks and tags (excluding those inside tables)
+ * - Shows indicator icon at the end
+ * - Click to preview rendered HTML
+ */
+export const htmlBlockExtension: Extension = [
+	htmlBlockPlugin,
+	htmlTooltipState,
+	clickOutsideHandler,
+	theme
+];

frontend/src/views/editor/extensions/markdown/plugins/image.ts

@@ -0,0 +1,331 @@
+/**
+ * Image plugin for CodeMirror.
+ *
+ * Features:
+ * - Identifies markdown images
+ * - Shows indicator icon at the end
+ * - Click to preview image
+ */
+
+import { syntaxTree } from '@codemirror/language';
+import { Extension, Range, StateField, StateEffect, ChangeSet } from '@codemirror/state';
+import {
+	DecorationSet,
+	Decoration,
+	WidgetType,
+	EditorView,
+	ViewPlugin,
+	ViewUpdate,
+	showTooltip,
+	Tooltip
+} from '@codemirror/view';
+
+interface ImageInfo {
+	src: string;
+	from: number;
+	to: number;
+	alt: string;
+}
+
+const IMAGE_EXT_RE = /\.(png|jpe?g|gif|webp|svg|bmp|ico|avif|apng|tiff?)(\?.*)?$/i;
+const IMAGE_ALT_RE = /(?:!\[)(.*?)(?:\])/;
+const ICON = `<svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="3" width="18" height="18" rx="2" ry="2"/><circle cx="8.5" cy="8.5" r="1.5"/><polyline points="21 15 16 10 5 21"/></svg>`;
+
+function isImageUrl(url: string): boolean {
+	return IMAGE_EXT_RE.test(url) || url.startsWith('data:image/');
+}
+
+/**
+ * Check if document changes affect any of the given regions.
+ */
+function changesAffectRegions(changes: ChangeSet, regions: { from: number; to: number }[]): boolean {
+	if (regions.length === 0) return true;
+	
+	let affected = false;
+	changes.iterChanges((fromA, toA) => {
+		if (affected) return;
+		for (const region of regions) {
+			if (fromA <= region.to && toA >= region.from) {
+				affected = true;
+				return;
+			}
+		}
+	});
+	return affected;
+}
+
+function extractImages(view: EditorView): ImageInfo[] {
+	const result: ImageInfo[] = [];
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ name, node, from: f, to: t }) => {
+				if (name !== 'Image') return;
+				const urlNode = node.getChild('URL');
+				if (!urlNode) return;
+				const src = view.state.sliceDoc(urlNode.from, urlNode.to);
+				if (!isImageUrl(src)) return;
+				const text = view.state.sliceDoc(f, t);
+				const alt = text.match(IMAGE_ALT_RE)?.[1] ?? '';
+				result.push({ src, from: f, to: t, alt });
+			}
+		});
+	}
+	return result;
+}
+
+/** Effect to toggle tooltip visibility */
+const toggleImageTooltip = StateEffect.define<ImageInfo | null>();
+
+/** Effect to close tooltip */
+const closeImageTooltip = StateEffect.define<null>();
+
+/** StateField to track active tooltip */
+const imageTooltipState = StateField.define<ImageInfo | null>({
+	create: () => null,
+	update(value, tr) {
+		for (const effect of tr.effects) {
+			if (effect.is(toggleImageTooltip)) {
+				// Toggle: if same image, close; otherwise open new
+				if (value && effect.value && value.from === effect.value.from) {
+					return null;
+				}
+				return effect.value;
+			}
+			if (effect.is(closeImageTooltip)) {
+				return null;
+			}
+		}
+		// Close tooltip on document changes
+		if (tr.docChanged) {
+			return null;
+		}
+		return value;
+	},
+	provide: (field) =>
+		showTooltip.from(field, (img): Tooltip | null => {
+			if (!img) return null;
+			return {
+				pos: img.to,
+				above: true,
+				create: () => {
+					const dom = document.createElement('div');
+					dom.className = 'cm-image-tooltip cm-image-loading';
+
+					const spinner = document.createElement('span');
+					spinner.className = 'cm-image-spinner';
+
+					const imgEl = document.createElement('img');
+					imgEl.src = img.src;
+					imgEl.alt = img.alt;
+
+					imgEl.onload = () => {
+						dom.classList.remove('cm-image-loading');
+					};
+					imgEl.onerror = () => {
+						spinner.remove();
+						imgEl.remove();
+						dom.textContent = 'Failed to load image';
+						dom.classList.remove('cm-image-loading');
+						dom.classList.add('cm-image-tooltip-error');
+					};
+
+					dom.append(spinner, imgEl);
+
+					// Prevent clicks inside tooltip from closing it
+					dom.addEventListener('click', (e) => {
+						e.stopPropagation();
+					});
+
+					return { dom };
+				}
+			};
+		})
+});
+
+/**
+ * Indicator widget shown at the end of images.
+ * Clicking toggles the tooltip.
+ */
+class IndicatorWidget extends WidgetType {
+	constructor(readonly info: ImageInfo) {
+		super();
+	}
+
+	toDOM(view: EditorView): HTMLElement {
+		const el = document.createElement('span');
+		el.className = 'cm-image-indicator';
+		el.innerHTML = ICON;
+		el.title = 'Click to preview image';
+
+		// Click handler to toggle tooltip
+		el.addEventListener('click', (e) => {
+			e.preventDefault();
+			e.stopPropagation();
+			view.dispatch({
+				effects: toggleImageTooltip.of(this.info)
+			});
+		});
+
+		return el;
+	}
+
+	eq(other: IndicatorWidget): boolean {
+		return this.info.from === other.info.from && this.info.src === other.info.src;
+	}
+
+	ignoreEvent(): boolean {
+		return false;
+	}
+}
+
+/**
+ * Plugin to manage image decorations.
+ * Optimized with incremental updates when changes don't affect image regions.
+ */
+class ImagePlugin {
+	decorations: DecorationSet;
+	images: ImageInfo[] = [];
+
+	constructor(view: EditorView) {
+		this.images = extractImages(view);
+		this.decorations = this.build();
+	}
+
+	update(update: ViewUpdate) {
+		// Always rebuild on viewport change
+		if (update.viewportChanged) {
+			this.images = extractImages(update.view);
+			this.decorations = this.build();
+			return;
+		}
+		
+		// For document changes, only rebuild if changes affect image regions
+		if (update.docChanged) {
+			const needsRebuild = changesAffectRegions(update.changes, this.images);
+			
+			if (needsRebuild) {
+				this.images = extractImages(update.view);
+				this.decorations = this.build();
+			} else {
+				// Just update positions of existing decorations
+				this.decorations = this.decorations.map(update.changes);
+				this.images = this.images.map(img => ({
+					...img,
+					from: update.changes.mapPos(img.from),
+					to: update.changes.mapPos(img.to)
+				}));
+			}
+		}
+	}
+
+	private build(): DecorationSet {
+		const deco: Range<Decoration>[] = [];
+		for (const img of this.images) {
+			deco.push(Decoration.widget({ widget: new IndicatorWidget(img), side: 1 }).range(img.to));
+		}
+		return Decoration.set(deco, true);
+	}
+}
+
+const imagePlugin = ViewPlugin.fromClass(ImagePlugin, {
+	decorations: (v) => v.decorations
+});
+
+/**
+ * Close tooltip when clicking outside.
+ */
+const clickOutsideHandler = EditorView.domEventHandlers({
+	click(event, view) {
+		const target = event.target as HTMLElement;
+
+		// Don't close if clicking on indicator or inside tooltip
+		if (target.closest('.cm-image-indicator') || target.closest('.cm-image-tooltip')) {
+			return false;
+		}
+
+		// Close tooltip if one is open
+		const currentTooltip = view.state.field(imageTooltipState);
+		if (currentTooltip) {
+			view.dispatch({
+				effects: closeImageTooltip.of(null)
+			});
+		}
+
+		return false;
+	}
+});
+
+const theme = EditorView.baseTheme({
+	'.cm-image-indicator': {
+		display: 'inline-flex',
+		alignItems: 'center',
+		marginLeft: '4px',
+		verticalAlign: 'middle',
+		cursor: 'pointer',
+		opacity: '0.5',
+		color: 'var(--cm-link-color, #1a73e8)',
+		transition: 'opacity 0.15s',
+		'& svg': { width: '14px', height: '14px' }
+	},
+	'.cm-image-indicator:hover': { opacity: '1' },
+
+	'.cm-image-tooltip': {
+		position: 'relative',
+		background: `
+			linear-gradient(45deg, #e0e0e0 25%, transparent 25%),
+			linear-gradient(-45deg, #e0e0e0 25%, transparent 25%),
+			linear-gradient(45deg, transparent 75%, #e0e0e0 75%),
+			linear-gradient(-45deg, transparent 75%, #e0e0e0 75%)
+		`,
+		backgroundColor: '#fff',
+		backgroundSize: '12px 12px',
+		backgroundPosition: '0 0, 0 6px, 6px -6px, -6px 0px',
+		border: '1px solid var(--border-color)',
+		boxShadow: '0 4px 12px rgba(0, 0, 0, 0.15)',
+		'& img': {
+			display: 'block',
+			maxWidth: '60vw',
+			maxHeight: '50vh',
+			opacity: '1',
+			transition: 'opacity 0.15s ease-out'
+		}
+	},
+	'.cm-image-loading': {
+		minWidth: '48px',
+		minHeight: '48px',
+		'& img': { opacity: '0' }
+	},
+	'.cm-image-spinner': {
+		position: 'absolute',
+		top: '50%',
+		left: '50%',
+		width: '16px',
+		height: '16px',
+		marginTop: '-8px',
+		marginLeft: '-8px',
+		border: '2px solid #ccc',
+		borderTopColor: '#666',
+		borderRadius: '50%',
+		animation: 'cm-spin 0.5s linear infinite'
+	},
+	'.cm-image-tooltip:not(.cm-image-loading) .cm-image-spinner': {
+		display: 'none'
+	},
+	'@keyframes cm-spin': {
+		to: { transform: 'rotate(360deg)' }
+	},
+	'.cm-image-tooltip-error': {
+		padding: '16px 24px',
+		fontSize: '12px',
+		color: 'red'
+	}
+});
+
+export const image = (): Extension => [
+	imagePlugin,
+	imageTooltipState,
+	clickOutsideHandler,
+	theme
+];

frontend/src/views/editor/extensions/markdown/plugins/inline-code.ts

@@ -0,0 +1,183 @@
+import { Extension, RangeSetBuilder } from '@codemirror/state';
+import {
+	Decoration,
+	DecorationSet,
+	EditorView,
+	ViewPlugin,
+	ViewUpdate
+} from '@codemirror/view';
+import { syntaxTree } from '@codemirror/language';
+import { checkRangeOverlap, invisibleDecoration, RangeTuple } from '../util';
+
+/** Mark decoration for code content */
+const codeMarkDecoration = Decoration.mark({ class: 'cm-inline-code' });
+
+/**
+ * Inline code styling plugin.
+ *
+ * Features:
+ * - Adds background color, border radius, padding to code content
+ * - Hides backtick markers when cursor is outside
+ */
+export const inlineCode = (): Extension => [inlineCodePlugin, baseTheme];
+
+/**
+ * Collect all inline code ranges in visible viewport.
+ */
+function collectCodeRanges(view: EditorView): RangeTuple[] {
+	const ranges: RangeTuple[] = [];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo }) => {
+				if (type.name !== 'InlineCode') return;
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+				ranges.push([nodeFrom, nodeTo]);
+			}
+		});
+	}
+
+	return ranges;
+}
+
+/**
+ * Get which inline code the cursor is in (-1 if none).
+ */
+function getCursorCodePos(ranges: RangeTuple[], selFrom: number, selTo: number): number {
+	const selRange: RangeTuple = [selFrom, selTo];
+	
+	for (const range of ranges) {
+		if (checkRangeOverlap(range, selRange)) {
+			return range[0];
+		}
+	}
+	return -1;
+}
+
+/**
+ * Build inline code decorations.
+ */
+function buildDecorations(view: EditorView): DecorationSet {
+	const builder = new RangeSetBuilder<Decoration>();
+	const items: { from: number; to: number; deco: Decoration }[] = [];
+	const { from: selFrom, to: selTo } = view.state.selection.main;
+	const selRange: RangeTuple = [selFrom, selTo];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo }) => {
+				if (type.name !== 'InlineCode') return;
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+
+				// Skip when cursor is in this code
+				if (checkRangeOverlap([nodeFrom, nodeTo], selRange)) return;
+
+				const text = view.state.doc.sliceString(nodeFrom, nodeTo);
+				
+				// Find backtick boundaries
+				let codeStart = nodeFrom;
+				let codeEnd = nodeTo;
+				
+				// Count opening backticks
+				let i = 0;
+				while (i < text.length && text[i] === '`') {
+					i++;
+				}
+				codeStart = nodeFrom + i;
+				
+				// Count closing backticks
+				let j = text.length - 1;
+				while (j >= 0 && text[j] === '`') {
+					j--;
+				}
+				codeEnd = nodeFrom + j + 1;
+
+				// Hide opening backticks
+				if (nodeFrom < codeStart) {
+					items.push({ from: nodeFrom, to: codeStart, deco: invisibleDecoration });
+				}
+
+				// Add style to code content
+				if (codeStart < codeEnd) {
+					items.push({ from: codeStart, to: codeEnd, deco: codeMarkDecoration });
+				}
+
+				// Hide closing backticks
+				if (codeEnd < nodeTo) {
+					items.push({ from: codeEnd, to: nodeTo, deco: invisibleDecoration });
+				}
+			}
+		});
+	}
+
+	// Sort and add to builder
+	items.sort((a, b) => a.from - b.from);
+	
+	for (const item of items) {
+		builder.add(item.from, item.to, item.deco);
+	}
+
+	return builder.finish();
+}
+
+/**
+ * Inline code plugin with optimized updates.
+ */
+class InlineCodePlugin {
+	decorations: DecorationSet;
+	private codeRanges: RangeTuple[] = [];
+	private cursorCodePos = -1;
+
+	constructor(view: EditorView) {
+		this.codeRanges = collectCodeRanges(view);
+		const { from, to } = view.state.selection.main;
+		this.cursorCodePos = getCursorCodePos(this.codeRanges, from, to);
+		this.decorations = buildDecorations(view);
+	}
+
+	update(update: ViewUpdate) {
+		const { docChanged, viewportChanged, selectionSet } = update;
+
+		if (docChanged || viewportChanged) {
+			this.codeRanges = collectCodeRanges(update.view);
+			const { from, to } = update.state.selection.main;
+			this.cursorCodePos = getCursorCodePos(this.codeRanges, from, to);
+			this.decorations = buildDecorations(update.view);
+			return;
+		}
+
+		if (selectionSet) {
+			const { from, to } = update.state.selection.main;
+			const newPos = getCursorCodePos(this.codeRanges, from, to);
+
+			if (newPos !== this.cursorCodePos) {
+				this.cursorCodePos = newPos;
+				this.decorations = buildDecorations(update.view);
+			}
+		}
+	}
+}
+
+const inlineCodePlugin = ViewPlugin.fromClass(InlineCodePlugin, {
+	decorations: (v) => v.decorations
+});
+
+/**
+ * Base theme for inline code.
+ */
+const baseTheme = EditorView.baseTheme({
+	'.cm-inline-code': {
+		backgroundColor: 'var(--cm-inline-code-bg)',
+		borderRadius: '0.25rem',
+		padding: '0.1rem 0.3rem',
+		fontFamily: 'var(--voidraft-font-mono)'
+	}
+});

frontend/src/views/editor/extensions/markdown/plugins/insert.ts

@@ -0,0 +1,159 @@
+import { Extension, RangeSetBuilder } from '@codemirror/state';
+import { syntaxTree } from '@codemirror/language';
+import {
+	ViewPlugin,
+	DecorationSet,
+	Decoration,
+	EditorView,
+	ViewUpdate
+} from '@codemirror/view';
+import { checkRangeOverlap, invisibleDecoration, RangeTuple } from '../util';
+
+/** Mark decoration for inserted content */
+const insertMarkDecoration = Decoration.mark({ class: 'cm-insert' });
+
+/**
+ * Insert plugin using syntax tree.
+ *
+ * Detects ++text++ and renders as inserted text (underline).
+ */
+export const insert = (): Extension => [insertPlugin, baseTheme];
+
+/**
+ * Collect all insert ranges in visible viewport.
+ */
+function collectInsertRanges(view: EditorView): RangeTuple[] {
+	const ranges: RangeTuple[] = [];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo }) => {
+				if (type.name !== 'Insert') return;
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+				ranges.push([nodeFrom, nodeTo]);
+			}
+		});
+	}
+
+	return ranges;
+}
+
+/**
+ * Get which insert the cursor is in (-1 if none).
+ */
+function getCursorInsertPos(ranges: RangeTuple[], selFrom: number, selTo: number): number {
+	const selRange: RangeTuple = [selFrom, selTo];
+	
+	for (const range of ranges) {
+		if (checkRangeOverlap(range, selRange)) {
+			return range[0];
+		}
+	}
+	return -1;
+}
+
+/**
+ * Build insert decorations.
+ */
+function buildDecorations(view: EditorView): DecorationSet {
+	const builder = new RangeSetBuilder<Decoration>();
+	const items: { from: number; to: number; deco: Decoration }[] = [];
+	const { from: selFrom, to: selTo } = view.state.selection.main;
+	const selRange: RangeTuple = [selFrom, selTo];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo, node }) => {
+				if (type.name !== 'Insert') return;
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+
+				// Skip if cursor is in this insert
+				if (checkRangeOverlap([nodeFrom, nodeTo], selRange)) return;
+
+				const marks = node.getChildren('InsertMark');
+				if (marks.length < 2) return;
+
+				// Hide opening ++
+				items.push({ from: marks[0].from, to: marks[0].to, deco: invisibleDecoration });
+
+				// Apply insert style to content
+				const contentStart = marks[0].to;
+				const contentEnd = marks[marks.length - 1].from;
+				if (contentStart < contentEnd) {
+					items.push({ from: contentStart, to: contentEnd, deco: insertMarkDecoration });
+				}
+
+				// Hide closing ++
+				items.push({ from: marks[marks.length - 1].from, to: marks[marks.length - 1].to, deco: invisibleDecoration });
+			}
+		});
+	}
+
+	// Sort and add to builder
+	items.sort((a, b) => a.from - b.from);
+	
+	for (const item of items) {
+		builder.add(item.from, item.to, item.deco);
+	}
+
+	return builder.finish();
+}
+
+/**
+ * Insert plugin with optimized updates.
+ */
+class InsertPlugin {
+	decorations: DecorationSet;
+	private insertRanges: RangeTuple[] = [];
+	private cursorInsertPos = -1;
+
+	constructor(view: EditorView) {
+		this.insertRanges = collectInsertRanges(view);
+		const { from, to } = view.state.selection.main;
+		this.cursorInsertPos = getCursorInsertPos(this.insertRanges, from, to);
+		this.decorations = buildDecorations(view);
+	}
+
+	update(update: ViewUpdate) {
+		const { docChanged, viewportChanged, selectionSet } = update;
+
+		if (docChanged || viewportChanged) {
+			this.insertRanges = collectInsertRanges(update.view);
+			const { from, to } = update.state.selection.main;
+			this.cursorInsertPos = getCursorInsertPos(this.insertRanges, from, to);
+			this.decorations = buildDecorations(update.view);
+			return;
+		}
+
+		if (selectionSet) {
+			const { from, to } = update.state.selection.main;
+			const newPos = getCursorInsertPos(this.insertRanges, from, to);
+
+			if (newPos !== this.cursorInsertPos) {
+				this.cursorInsertPos = newPos;
+				this.decorations = buildDecorations(update.view);
+			}
+		}
+	}
+}
+
+const insertPlugin = ViewPlugin.fromClass(InsertPlugin, {
+	decorations: (v) => v.decorations
+});
+
+/**
+ * Base theme for insert.
+ */
+const baseTheme = EditorView.baseTheme({
+	'.cm-insert': {
+		textDecoration: 'underline',
+	}
+});

frontend/src/views/editor/extensions/markdown/plugins/link.ts

@@ -0,0 +1,202 @@
+import { syntaxTree } from '@codemirror/language';
+import { Extension, RangeSetBuilder } from '@codemirror/state';
+import {
+	Decoration,
+	DecorationSet,
+	EditorView,
+	ViewPlugin,
+	ViewUpdate
+} from '@codemirror/view';
+import { checkRangeOverlap, invisibleDecoration, RangeTuple } from '../util';
+
+/**
+ * Parent node types that should not process.
+ * - Image: handled by image plugin
+ * - LinkReference: reference link definitions should be fully visible
+ */
+const BLACKLISTED_PARENTS = new Set(['Image', 'LinkReference']);
+
+/**
+ * Links plugin.
+ *
+ * Features:
+ * - Hides link markup when cursor is outside
+ * - Link icons and click events are handled by hyperlink extension
+ */
+export const links = (): Extension => [goToLinkPlugin];
+
+/**
+ * Link info for tracking.
+ */
+interface LinkInfo {
+	parentFrom: number;
+	parentTo: number;
+	urlFrom: number;
+	urlTo: number;
+	marks: { from: number; to: number }[];
+	linkTitle: { from: number; to: number } | null;
+	isAutoLink: boolean;
+}
+
+/**
+ * Collect all link ranges in visible viewport.
+ */
+function collectLinkRanges(view: EditorView): RangeTuple[] {
+	const ranges: RangeTuple[] = [];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, node }) => {
+				if (type.name !== 'URL') return;
+
+				const parent = node.parent;
+				if (!parent || BLACKLISTED_PARENTS.has(parent.name)) return;
+				if (seen.has(parent.from)) return;
+				seen.add(parent.from);
+
+				ranges.push([parent.from, parent.to]);
+			}
+		});
+	}
+
+	return ranges;
+}
+
+/**
+ * Get which link the cursor is in (-1 if none).
+ */
+function getCursorLinkPos(ranges: RangeTuple[], selFrom: number, selTo: number): number {
+	const selRange: RangeTuple = [selFrom, selTo];
+	
+	for (const range of ranges) {
+		if (checkRangeOverlap(range, selRange)) {
+			return range[0];
+		}
+	}
+	return -1;
+}
+
+/**
+ * Build link decorations.
+ */
+function buildDecorations(view: EditorView): DecorationSet {
+	const builder = new RangeSetBuilder<Decoration>();
+	const items: { from: number; to: number }[] = [];
+	const { from: selFrom, to: selTo } = view.state.selection.main;
+	const selRange: RangeTuple = [selFrom, selTo];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo, node }) => {
+				if (type.name !== 'URL') return;
+
+				const parent = node.parent;
+				if (!parent || BLACKLISTED_PARENTS.has(parent.name)) return;
+
+				// Use parent.from as unique key to handle multiple URLs in same link
+				if (seen.has(parent.from)) return;
+				seen.add(parent.from);
+
+				const marks = parent.getChildren('LinkMark');
+				const linkTitle = parent.getChild('LinkTitle');
+
+				// Find the ']' mark to distinguish link text from URL
+				const closeBracketMark = marks.find((mark) => {
+					const text = view.state.sliceDoc(mark.from, mark.to);
+					return text === ']';
+				});
+
+				// If URL is before ']', it's part of display text, don't hide
+				if (closeBracketMark && nodeFrom < closeBracketMark.from) {
+					return;
+				}
+
+				// Check if cursor overlaps with the parent link
+				if (checkRangeOverlap([parent.from, parent.to], selRange)) {
+					return;
+				}
+
+				// Hide link marks and URL
+				if (marks.length > 0) {
+					for (const mark of marks) {
+						items.push({ from: mark.from, to: mark.to });
+					}
+					items.push({ from: nodeFrom, to: nodeTo });
+
+					if (linkTitle) {
+						items.push({ from: linkTitle.from, to: linkTitle.to });
+					}
+				}
+
+				// Handle auto-links with < > markers
+				const linkContent = view.state.sliceDoc(nodeFrom, nodeTo);
+				if (linkContent.startsWith('<') && linkContent.endsWith('>')) {
+					// Already hidden the whole URL above, no extra handling needed
+				}
+			}
+		});
+	}
+
+	// Sort and add to builder
+	items.sort((a, b) => a.from - b.from);
+	
+	// Deduplicate overlapping ranges
+	let lastTo = -1;
+	for (const item of items) {
+		if (item.from >= lastTo) {
+			builder.add(item.from, item.to, invisibleDecoration);
+			lastTo = item.to;
+		}
+	}
+
+	return builder.finish();
+}
+
+/**
+ * Link plugin with optimized updates.
+ */
+class LinkPlugin {
+	decorations: DecorationSet;
+	private linkRanges: RangeTuple[] = [];
+	private cursorLinkPos = -1;
+
+	constructor(view: EditorView) {
+		this.linkRanges = collectLinkRanges(view);
+		const { from, to } = view.state.selection.main;
+		this.cursorLinkPos = getCursorLinkPos(this.linkRanges, from, to);
+		this.decorations = buildDecorations(view);
+	}
+
+	update(update: ViewUpdate) {
+		const { docChanged, viewportChanged, selectionSet } = update;
+
+		if (docChanged || viewportChanged) {
+			this.linkRanges = collectLinkRanges(update.view);
+			const { from, to } = update.state.selection.main;
+			this.cursorLinkPos = getCursorLinkPos(this.linkRanges, from, to);
+			this.decorations = buildDecorations(update.view);
+			return;
+		}
+
+		if (selectionSet) {
+			const { from, to } = update.state.selection.main;
+			const newPos = getCursorLinkPos(this.linkRanges, from, to);
+
+			if (newPos !== this.cursorLinkPos) {
+				this.cursorLinkPos = newPos;
+				this.decorations = buildDecorations(update.view);
+			}
+		}
+	}
+}
+
+export const goToLinkPlugin = ViewPlugin.fromClass(LinkPlugin, {
+	decorations: (v) => v.decorations
+});
+

frontend/src/views/editor/extensions/markdown/plugins/list.ts

@@ -0,0 +1,419 @@
+import {
+	Decoration,
+	DecorationSet,
+	EditorView,
+	ViewPlugin,
+	ViewUpdate,
+	WidgetType
+} from '@codemirror/view';
+import { Range, RangeSetBuilder, EditorState } from '@codemirror/state';
+import { syntaxTree } from '@codemirror/language';
+import { checkRangeOverlap, RangeTuple } from '../util';
+
+/** Bullet list marker pattern */
+const BULLET_LIST_MARKER_RE = /^[-+*]$/;
+
+/**
+ * Lists plugin.
+ *
+ * Features:
+ * - Custom bullet mark rendering (- → •)
+ * - Interactive task list checkboxes
+ */
+export const lists = () => [listBulletPlugin, taskListPlugin, baseTheme];
+
+// ============================================================================
+// List Bullet Plugin
+// ============================================================================
+
+class ListBulletWidget extends WidgetType {
+	constructor(readonly bullet: string) {
+		super();
+	}
+
+	eq(other: ListBulletWidget): boolean {
+		return other.bullet === this.bullet;
+	}
+
+	toDOM(): HTMLElement {
+		const span = document.createElement('span');
+		span.className = 'cm-list-bullet';
+		span.textContent = '•';
+		return span;
+	}
+}
+
+/**
+ * Collect all list mark ranges in visible viewport.
+ */
+function collectBulletRanges(view: EditorView): RangeTuple[] {
+	const ranges: RangeTuple[] = [];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo, node }) => {
+				if (type.name !== 'ListMark') return;
+				
+				// Skip task list items
+				const parent = node.parent;
+				if (parent?.getChild('Task')) return;
+				
+				// Only bullet markers
+				const text = view.state.sliceDoc(nodeFrom, nodeTo);
+				if (!BULLET_LIST_MARKER_RE.test(text)) return;
+
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+				ranges.push([nodeFrom, nodeTo]);
+			}
+		});
+	}
+
+	return ranges;
+}
+
+/**
+ * Get which bullet the cursor is in (-1 if none).
+ */
+function getCursorBulletPos(ranges: RangeTuple[], selFrom: number, selTo: number): number {
+	const selRange: RangeTuple = [selFrom, selTo];
+	
+	for (const range of ranges) {
+		if (checkRangeOverlap(range, selRange)) {
+			return range[0];
+		}
+	}
+	return -1;
+}
+
+/**
+ * Build list bullet decorations.
+ */
+function buildBulletDecorations(view: EditorView): DecorationSet {
+	const builder = new RangeSetBuilder<Decoration>();
+	const items: { from: number; to: number; bullet: string }[] = [];
+	const { from: selFrom, to: selTo } = view.state.selection.main;
+	const selRange: RangeTuple = [selFrom, selTo];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo, node }) => {
+				if (type.name !== 'ListMark') return;
+				
+				// Skip task list items
+				const parent = node.parent;
+				if (parent?.getChild('Task')) return;
+
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+
+				// Skip if cursor is in this mark
+				if (checkRangeOverlap([nodeFrom, nodeTo], selRange)) return;
+
+				const bullet = view.state.sliceDoc(nodeFrom, nodeTo);
+				if (BULLET_LIST_MARKER_RE.test(bullet)) {
+					items.push({ from: nodeFrom, to: nodeTo, bullet });
+				}
+			}
+		});
+	}
+
+	// Sort and add to builder
+	items.sort((a, b) => a.from - b.from);
+	
+	for (const item of items) {
+		builder.add(item.from, item.to, Decoration.replace({
+			widget: new ListBulletWidget(item.bullet)
+		}));
+	}
+
+	return builder.finish();
+}
+
+/**
+ * List bullet plugin with optimized updates.
+ */
+class ListBulletPlugin {
+	decorations: DecorationSet;
+	private bulletRanges: RangeTuple[] = [];
+	private cursorBulletPos = -1;
+
+	constructor(view: EditorView) {
+		this.bulletRanges = collectBulletRanges(view);
+		const { from, to } = view.state.selection.main;
+		this.cursorBulletPos = getCursorBulletPos(this.bulletRanges, from, to);
+		this.decorations = buildBulletDecorations(view);
+	}
+
+	update(update: ViewUpdate) {
+		const { docChanged, viewportChanged, selectionSet } = update;
+
+		if (docChanged || viewportChanged) {
+			this.bulletRanges = collectBulletRanges(update.view);
+			const { from, to } = update.state.selection.main;
+			this.cursorBulletPos = getCursorBulletPos(this.bulletRanges, from, to);
+			this.decorations = buildBulletDecorations(update.view);
+			return;
+		}
+
+		if (selectionSet) {
+			const { from, to } = update.state.selection.main;
+			const newPos = getCursorBulletPos(this.bulletRanges, from, to);
+
+			if (newPos !== this.cursorBulletPos) {
+				this.cursorBulletPos = newPos;
+				this.decorations = buildBulletDecorations(update.view);
+			}
+		}
+	}
+}
+
+const listBulletPlugin = ViewPlugin.fromClass(ListBulletPlugin, {
+	decorations: (v) => v.decorations
+});
+
+// ============================================================================
+// Task List Plugin
+// ============================================================================
+
+class TaskCheckboxWidget extends WidgetType {
+	constructor(
+		readonly checked: boolean,
+		readonly pos: number
+	) {
+		super();
+	}
+
+	eq(other: TaskCheckboxWidget): boolean {
+		return other.checked === this.checked && other.pos === this.pos;
+	}
+
+	toDOM(view: EditorView): HTMLElement {
+		const wrap = document.createElement('span');
+		wrap.setAttribute('aria-hidden', 'true');
+		wrap.className = 'cm-task-checkbox';
+
+		const checkbox = document.createElement('input');
+		checkbox.type = 'checkbox';
+		checkbox.checked = this.checked;
+		checkbox.tabIndex = -1;
+
+		checkbox.addEventListener('mousedown', (e) => {
+			e.preventDefault();
+			e.stopPropagation();
+
+			const newValue = !this.checked;
+			view.dispatch({
+				changes: {
+					from: this.pos,
+					to: this.pos + 1,
+					insert: newValue ? 'x' : ' '
+				}
+			});
+		});
+
+		wrap.appendChild(checkbox);
+		return wrap;
+	}
+
+	ignoreEvent(): boolean {
+		return false;
+	}
+}
+
+/**
+ * Collect all task ranges in visible viewport.
+ */
+function collectTaskRanges(view: EditorView): RangeTuple[] {
+	const ranges: RangeTuple[] = [];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo, node }) => {
+				if (type.name !== 'Task') return;
+				
+				const listItem = node.parent;
+				if (!listItem || listItem.type.name !== 'ListItem') return;
+				
+				const listMark = listItem.getChild('ListMark');
+				if (!listMark) return;
+
+				if (seen.has(listMark.from)) return;
+				seen.add(listMark.from);
+				
+				// Track the full range from ListMark to TaskMarker
+				const taskMarker = node.getChild('TaskMarker');
+				if (taskMarker) {
+					ranges.push([listMark.from, taskMarker.to]);
+				}
+			}
+		});
+	}
+
+	return ranges;
+}
+
+/**
+ * Get which task the cursor is in (-1 if none).
+ */
+function getCursorTaskPos(ranges: RangeTuple[], selFrom: number, selTo: number): number {
+	const selRange: RangeTuple = [selFrom, selTo];
+	
+	for (const range of ranges) {
+		if (checkRangeOverlap(range, selRange)) {
+			return range[0];
+		}
+	}
+	return -1;
+}
+
+/**
+ * Build task list decorations.
+ */
+function buildTaskDecorations(view: EditorView): DecorationSet {
+	const builder = new RangeSetBuilder<Decoration>();
+	const items: { from: number; to: number; deco: Decoration; priority: number }[] = [];
+	const { from: selFrom, to: selTo } = view.state.selection.main;
+	const selRange: RangeTuple = [selFrom, selTo];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: taskFrom, to: taskTo, node }) => {
+				if (type.name !== 'Task') return;
+
+				const listItem = node.parent;
+				if (!listItem || listItem.type.name !== 'ListItem') return;
+
+				const listMark = listItem.getChild('ListMark');
+				const taskMarker = node.getChild('TaskMarker');
+				if (!listMark || !taskMarker) return;
+
+				if (seen.has(listMark.from)) return;
+				seen.add(listMark.from);
+
+				const replaceFrom = listMark.from;
+				const replaceTo = taskMarker.to;
+
+				// Skip if cursor is in this range
+				if (checkRangeOverlap([replaceFrom, replaceTo], selRange)) return;
+
+				// Check if task is checked
+				const markerText = view.state.sliceDoc(taskMarker.from, taskMarker.to);
+				const isChecked = markerText.length >= 2 && 'xX'.includes(markerText[1]);
+				const checkboxPos = taskMarker.from + 1;
+
+				// Add strikethrough for checked items
+				if (isChecked) {
+					items.push({
+						from: taskFrom,
+						to: taskTo,
+						deco: Decoration.mark({ class: 'cm-task-checked' }),
+						priority: 0
+					});
+				}
+
+				// Replace "- [x]" or "- [ ]" with checkbox widget
+				items.push({
+					from: replaceFrom,
+					to: replaceTo,
+					deco: Decoration.replace({
+						widget: new TaskCheckboxWidget(isChecked, checkboxPos)
+					}),
+					priority: 1
+				});
+			}
+		});
+	}
+
+	// Sort by position, then priority
+	items.sort((a, b) => {
+		if (a.from !== b.from) return a.from - b.from;
+		return a.priority - b.priority;
+	});
+	
+	for (const item of items) {
+		builder.add(item.from, item.to, item.deco);
+	}
+
+	return builder.finish();
+}
+
+/**
+ * Task list plugin with optimized updates.
+ */
+class TaskListPlugin {
+	decorations: DecorationSet;
+	private taskRanges: RangeTuple[] = [];
+	private cursorTaskPos = -1;
+
+	constructor(view: EditorView) {
+		this.taskRanges = collectTaskRanges(view);
+		const { from, to } = view.state.selection.main;
+		this.cursorTaskPos = getCursorTaskPos(this.taskRanges, from, to);
+		this.decorations = buildTaskDecorations(view);
+	}
+
+	update(update: ViewUpdate) {
+		const { docChanged, viewportChanged, selectionSet } = update;
+
+		if (docChanged || viewportChanged) {
+			this.taskRanges = collectTaskRanges(update.view);
+			const { from, to } = update.state.selection.main;
+			this.cursorTaskPos = getCursorTaskPos(this.taskRanges, from, to);
+			this.decorations = buildTaskDecorations(update.view);
+			return;
+		}
+
+		if (selectionSet) {
+			const { from, to } = update.state.selection.main;
+			const newPos = getCursorTaskPos(this.taskRanges, from, to);
+
+			if (newPos !== this.cursorTaskPos) {
+				this.cursorTaskPos = newPos;
+				this.decorations = buildTaskDecorations(update.view);
+			}
+		}
+	}
+}
+
+const taskListPlugin = ViewPlugin.fromClass(TaskListPlugin, {
+	decorations: (v) => v.decorations
+});
+
+// ============================================================================
+// Theme
+// ============================================================================
+
+const baseTheme = EditorView.baseTheme({
+	'.cm-list-bullet': {
+		color: 'var(--cm-list-bullet-color, inherit)'
+	},
+	'.cm-task-checked': {
+		textDecoration: 'line-through',
+		opacity: '0.6'
+	},
+	'.cm-task-checkbox': {
+		display: 'inline-block',
+		verticalAlign: 'baseline'
+	},
+	'.cm-task-checkbox input': {
+		cursor: 'pointer',
+		margin: '0',
+		width: '1em',
+		height: '1em',
+		position: 'relative',
+		top: '0.1em'
+	}
+});

frontend/src/views/editor/extensions/markdown/plugins/math.ts

@@ -0,0 +1,422 @@
+/**
+ * Math plugin for CodeMirror using KaTeX.
+ * 
+ * Features:
+ * - Renders inline math $...$ as inline formula
+ * - Renders block math $$...$$ as block formula
+ * - Block math: lines remain, content hidden, formula overlays on top
+ * - Shows source when cursor is inside
+ */
+
+import { Extension, Range } from '@codemirror/state';
+import { syntaxTree } from '@codemirror/language';
+import {
+	ViewPlugin,
+	DecorationSet,
+	Decoration,
+	EditorView,
+	ViewUpdate,
+	WidgetType
+} from '@codemirror/view';
+import katex from 'katex';
+import 'katex/dist/katex.min.css';
+import { isCursorInRange, invisibleDecoration } from '../util';
+import { LruCache } from '@/common/utils/lruCache';
+
+interface KatexCacheValue {
+	html: string;
+	error: string | null;
+}
+
+/**
+ * LRU cache for KaTeX rendering results.
+ * Key format: "inline:latex" or "block:latex"
+ */
+const katexCache = new LruCache<string, KatexCacheValue>(200);
+
+/**
+ * Get cached KaTeX render result or render and cache it.
+ */
+function renderKatex(latex: string, displayMode: boolean): KatexCacheValue {
+	const cacheKey = `${displayMode ? 'block' : 'inline'}:${latex}`;
+	
+	// Check cache first
+	const cached = katexCache.get(cacheKey);
+	if (cached !== undefined) {
+		return cached;
+	}
+	
+	// Render and cache
+	let result: KatexCacheValue;
+	try {
+		const html = katex.renderToString(latex, {
+			throwOnError: !displayMode, // inline throws, block doesn't
+			displayMode,
+			output: 'html'
+		});
+		result = { html, error: null };
+	} catch (e) {
+		result = {
+			html: '',
+			error: e instanceof Error ? e.message : 'Render error'
+		};
+	}
+	
+	katexCache.set(cacheKey, result);
+	return result;
+}
+
+/**
+ * Widget to display inline math formula.
+ * Uses cached KaTeX rendering for performance.
+ */
+class InlineMathWidget extends WidgetType {
+	constructor(readonly latex: string) {
+		super();
+	}
+
+	toDOM(): HTMLElement {
+		const span = document.createElement('span');
+		span.className = 'cm-inline-math';
+		
+		// Use cached render
+		const { html, error } = renderKatex(this.latex, false);
+		
+		if (error) {
+			span.textContent = this.latex;
+			span.title = error;
+		} else {
+			span.innerHTML = html;
+		}
+		
+		return span;
+	}
+
+	eq(other: InlineMathWidget): boolean {
+		return this.latex === other.latex;
+	}
+
+	ignoreEvent(): boolean {
+		return false;
+	}
+}
+
+/**
+ * Widget to display block math formula.
+ * Uses absolute positioning to overlay on source lines.
+ */
+class BlockMathWidget extends WidgetType {
+	constructor(
+		readonly latex: string,
+		readonly lineCount: number = 1,
+		readonly lineHeight: number = 22
+	) {
+		super();
+	}
+
+	toDOM(): HTMLElement {
+		const container = document.createElement('div');
+		container.className = 'cm-block-math-container';
+		// Set height to cover all source lines
+		const height = this.lineCount * this.lineHeight;
+		container.style.height = `${height}px`;
+		
+		const inner = document.createElement('div');
+		inner.className = 'cm-block-math';
+		
+		// Use cached render
+		const { html, error } = renderKatex(this.latex, true);
+		
+		if (error) {
+			inner.textContent = this.latex;
+			inner.title = error;
+		} else {
+			inner.innerHTML = html;
+		}
+		
+		container.appendChild(inner);
+		return container;
+	}
+
+	eq(other: BlockMathWidget): boolean {
+		return this.latex === other.latex && this.lineCount === other.lineCount;
+	}
+
+	ignoreEvent(): boolean {
+		return false;
+	}
+}
+
+/**
+ * Represents a math region in the document.
+ */
+interface MathRegion {
+	from: number;
+	to: number;
+}
+
+/**
+ * Result of building decorations, includes math regions for cursor tracking.
+ */
+interface BuildResult {
+	decorations: DecorationSet;
+	mathRegions: MathRegion[];
+}
+
+/**
+ * Find the math region containing the given position.
+ * Returns the region index or -1 if not in any region.
+ */
+function findMathRegionIndex(pos: number, regions: MathRegion[]): number {
+	for (let i = 0; i < regions.length; i++) {
+		if (pos >= regions[i].from && pos <= regions[i].to) {
+			return i;
+		}
+	}
+	return -1;
+}
+
+/**
+ * Build decorations for math formulas.
+ * Also collects math regions for cursor tracking optimization.
+ */
+function buildDecorations(view: EditorView): BuildResult {
+	const decorations: Range<Decoration>[] = [];
+	const mathRegions: MathRegion[] = [];
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo, node }) => {
+				// Handle inline math
+				if (type.name === 'InlineMath') {
+					// Collect math region for cursor tracking
+					mathRegions.push({ from: nodeFrom, to: nodeTo });
+					
+					const cursorInRange = isCursorInRange(view.state, [nodeFrom, nodeTo]);
+					const marks = node.getChildren('InlineMathMark');
+
+					if (!cursorInRange && marks.length >= 2) {
+						// Get latex content (without $ marks)
+						const latex = view.state.sliceDoc(marks[0].to, marks[marks.length - 1].from);
+						
+						// Hide the entire syntax
+						decorations.push(invisibleDecoration.range(nodeFrom, nodeTo));
+						
+						// Add widget at the end
+						decorations.push(
+							Decoration.widget({
+								widget: new InlineMathWidget(latex),
+								side: 1
+							}).range(nodeTo)
+						);
+					}
+				}
+
+				// Handle block math ($$...$$)
+				if (type.name === 'BlockMath') {
+					// Collect math region for cursor tracking
+					mathRegions.push({ from: nodeFrom, to: nodeTo });
+					
+					const cursorInRange = isCursorInRange(view.state, [nodeFrom, nodeTo]);
+					const marks = node.getChildren('BlockMathMark');
+
+					if (!cursorInRange && marks.length >= 2) {
+						// Get latex content (without $$ marks)
+						const latex = view.state.sliceDoc(marks[0].to, marks[marks.length - 1].from).trim();
+						
+						// Calculate line info
+						const startLine = view.state.doc.lineAt(nodeFrom);
+						const endLine = view.state.doc.lineAt(nodeTo);
+						const lineCount = endLine.number - startLine.number + 1;
+						const lineHeight = view.defaultLineHeight;
+						
+						// Check if block math spans multiple lines
+						const hasLineBreak = lineCount > 1;
+						
+						if (hasLineBreak) {
+							// For multi-line: use line decorations to hide content
+							for (let lineNum = startLine.number; lineNum <= endLine.number; lineNum++) {
+								const line = view.state.doc.line(lineNum);
+								decorations.push(
+									Decoration.line({
+										class: 'cm-block-math-line'
+									}).range(line.from)
+								);
+							}
+							
+							// Add widget on the first line (positioned absolutely)
+							decorations.push(
+								Decoration.widget({
+									widget: new BlockMathWidget(latex, lineCount, lineHeight),
+									side: -1
+								}).range(startLine.from)
+							);
+						} else {
+							// Single line: make content transparent, overlay widget
+							decorations.push(
+								Decoration.mark({
+									class: 'cm-block-math-content-hidden'
+								}).range(nodeFrom, nodeTo)
+							);
+							
+							// Add widget at the start (positioned absolutely)
+							decorations.push(
+								Decoration.widget({
+									widget: new BlockMathWidget(latex, 1, lineHeight),
+									side: -1
+								}).range(nodeFrom)
+							);
+						}
+					}
+				}
+			}
+		});
+	}
+
+	return {
+		decorations: Decoration.set(decorations, true),
+		mathRegions
+	};
+}
+
+/**
+ * Math plugin with optimized update detection.
+ */
+class MathPlugin {
+	decorations: DecorationSet;
+	private mathRegions: MathRegion[] = [];
+	private lastSelectionHead: number = -1;
+	private lastMathRegionIndex: number = -1;
+
+	constructor(view: EditorView) {
+		const result = buildDecorations(view);
+		this.decorations = result.decorations;
+		this.mathRegions = result.mathRegions;
+		this.lastSelectionHead = view.state.selection.main.head;
+		this.lastMathRegionIndex = findMathRegionIndex(this.lastSelectionHead, this.mathRegions);
+	}
+
+	update(update: ViewUpdate) {
+		// Always rebuild on document change or viewport change
+		if (update.docChanged || update.viewportChanged) {
+			const result = buildDecorations(update.view);
+			this.decorations = result.decorations;
+			this.mathRegions = result.mathRegions;
+			this.lastSelectionHead = update.state.selection.main.head;
+			this.lastMathRegionIndex = findMathRegionIndex(this.lastSelectionHead, this.mathRegions);
+			return;
+		}
+
+		// For selection changes, only rebuild if cursor changes math region context
+		if (update.selectionSet) {
+			const newHead = update.state.selection.main.head;
+			
+			if (newHead !== this.lastSelectionHead) {
+				const newRegionIndex = findMathRegionIndex(newHead, this.mathRegions);
+				
+				// Only rebuild if:
+				// 1. Cursor entered a math region (was outside, now inside)
+				// 2. Cursor left a math region (was inside, now outside)
+				// 3. Cursor moved to a different math region
+				if (newRegionIndex !== this.lastMathRegionIndex) {
+					const result = buildDecorations(update.view);
+					this.decorations = result.decorations;
+					this.mathRegions = result.mathRegions;
+					this.lastMathRegionIndex = findMathRegionIndex(newHead, this.mathRegions);
+				}
+				
+				this.lastSelectionHead = newHead;
+			}
+		}
+	}
+}
+
+const mathPlugin = ViewPlugin.fromClass(
+	MathPlugin,
+	{
+		decorations: (v) => v.decorations
+	}
+);
+
+/**
+ * Base theme for math.
+ */
+const baseTheme = EditorView.baseTheme({
+	// Inline math
+	'.cm-inline-math': {
+		display: 'inline',
+		verticalAlign: 'baseline',
+	},
+	'.cm-inline-math .katex': {
+		fontSize: 'inherit',
+	},
+	
+	// Block math container - absolute positioned to overlay on source
+	'.cm-block-math-container': {
+		position: 'absolute',
+		left: '0',
+		right: '0',
+		display: 'flex',
+		justifyContent: 'center',
+		alignItems: 'center',
+		pointerEvents: 'none',
+		zIndex: '1',
+	},
+	
+	// Block math inner
+	'.cm-block-math': {
+		display: 'inline-block',
+		textAlign: 'center',
+		pointerEvents: 'auto',
+	},
+	'.cm-block-math .katex-display': {
+		margin: '0',
+	},
+	'.cm-block-math .katex': {
+		fontSize: '1.1em',
+	},
+	
+	// Hidden line content for block math (text transparent but line preserved)
+	// Use high specificity to override rainbow brackets and other plugins
+	'.cm-line.cm-block-math-line': {
+		color: 'transparent !important',
+		caretColor: 'transparent',
+	},
+	'.cm-line.cm-block-math-line span': {
+		color: 'transparent !important',
+	},
+	// Override rainbow brackets in hidden math lines
+	'.cm-line.cm-block-math-line [class*="cm-rainbow-bracket"]': {
+		color: 'transparent !important',
+	},
+	
+	// Hidden content for single-line block math
+	'.cm-block-math-content-hidden': {
+		color: 'transparent !important',
+	},
+	'.cm-block-math-content-hidden span': {
+		color: 'transparent !important',
+	},
+	'.cm-block-math-content-hidden [class*="cm-rainbow-bracket"]': {
+		color: 'transparent !important',
+	},
+});
+
+/**
+ * Math extension.
+ * 
+ * Features:
+ * - Parses inline math $...$ and block math $$...$$
+ * - Renders formulas using KaTeX
+ * - Block math preserves line structure, overlays rendered formula
+ * - Shows source when cursor is inside
+ */
+export const math = (): Extension => [
+	mathPlugin,
+	baseTheme
+];
+
+export default math;
+

frontend/src/views/editor/extensions/markdown/plugins/subscript-superscript.ts

@@ -0,0 +1,184 @@
+import { Extension, RangeSetBuilder } from '@codemirror/state';
+import { syntaxTree } from '@codemirror/language';
+import {
+	ViewPlugin,
+	DecorationSet,
+	Decoration,
+	EditorView,
+	ViewUpdate
+} from '@codemirror/view';
+import { checkRangeOverlap, invisibleDecoration, RangeTuple } from '../util';
+
+/** Pre-computed mark decorations */
+const superscriptMarkDecoration = Decoration.mark({ class: 'cm-superscript' });
+const subscriptMarkDecoration = Decoration.mark({ class: 'cm-subscript' });
+
+/**
+ * Subscript and Superscript plugin using syntax tree.
+ *
+ * - Superscript: ^text^ → renders as superscript
+ * - Subscript: ~text~ → renders as subscript
+ *
+ * Note: Inline footnotes ^[content] are handled by the Footnote extension.
+ */
+export const subscriptSuperscript = (): Extension => [
+	subscriptSuperscriptPlugin,
+	baseTheme
+];
+
+/** Node types to handle */
+const SCRIPT_TYPES = new Set(['Superscript', 'Subscript']);
+
+/**
+ * Collect all superscript/subscript ranges in visible viewport.
+ */
+function collectScriptRanges(view: EditorView): RangeTuple[] {
+	const ranges: RangeTuple[] = [];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo }) => {
+				if (!SCRIPT_TYPES.has(type.name)) return;
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+				ranges.push([nodeFrom, nodeTo]);
+			}
+		});
+	}
+
+	return ranges;
+}
+
+/**
+ * Get which script element the cursor is in (-1 if none).
+ */
+function getCursorScriptPos(ranges: RangeTuple[], selFrom: number, selTo: number): number {
+	const selRange: RangeTuple = [selFrom, selTo];
+	
+	for (const range of ranges) {
+		if (checkRangeOverlap(range, selRange)) {
+			return range[0];
+		}
+	}
+	return -1;
+}
+
+/**
+ * Build decorations for subscript and superscript.
+ */
+function buildDecorations(view: EditorView): DecorationSet {
+	const builder = new RangeSetBuilder<Decoration>();
+	const items: { from: number; to: number; deco: Decoration }[] = [];
+	const { from: selFrom, to: selTo } = view.state.selection.main;
+	const selRange: RangeTuple = [selFrom, selTo];
+	const seen = new Set<number>();
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo, node }) => {
+				if (!SCRIPT_TYPES.has(type.name)) return;
+				if (seen.has(nodeFrom)) return;
+				seen.add(nodeFrom);
+
+				// Skip if cursor is in this element
+				if (checkRangeOverlap([nodeFrom, nodeTo], selRange)) return;
+
+				const isSuperscript = type.name === 'Superscript';
+				const markName = isSuperscript ? 'SuperscriptMark' : 'SubscriptMark';
+				const contentDeco = isSuperscript ? superscriptMarkDecoration : subscriptMarkDecoration;
+
+				const marks = node.getChildren(markName);
+				if (marks.length < 2) return;
+
+				// Hide opening mark
+				items.push({ from: marks[0].from, to: marks[0].to, deco: invisibleDecoration });
+
+				// Apply style to content
+				const contentStart = marks[0].to;
+				const contentEnd = marks[marks.length - 1].from;
+				if (contentStart < contentEnd) {
+					items.push({ from: contentStart, to: contentEnd, deco: contentDeco });
+				}
+
+				// Hide closing mark
+				items.push({ from: marks[marks.length - 1].from, to: marks[marks.length - 1].to, deco: invisibleDecoration });
+			}
+		});
+	}
+
+	// Sort and add to builder
+	items.sort((a, b) => a.from - b.from);
+	
+	for (const item of items) {
+		builder.add(item.from, item.to, item.deco);
+	}
+
+	return builder.finish();
+}
+
+/**
+ * Subscript/Superscript plugin with optimized updates.
+ */
+class SubscriptSuperscriptPlugin {
+	decorations: DecorationSet;
+	private scriptRanges: RangeTuple[] = [];
+	private cursorScriptPos = -1;
+
+	constructor(view: EditorView) {
+		this.scriptRanges = collectScriptRanges(view);
+		const { from, to } = view.state.selection.main;
+		this.cursorScriptPos = getCursorScriptPos(this.scriptRanges, from, to);
+		this.decorations = buildDecorations(view);
+	}
+
+	update(update: ViewUpdate) {
+		const { docChanged, viewportChanged, selectionSet } = update;
+
+		if (docChanged || viewportChanged) {
+			this.scriptRanges = collectScriptRanges(update.view);
+			const { from, to } = update.state.selection.main;
+			this.cursorScriptPos = getCursorScriptPos(this.scriptRanges, from, to);
+			this.decorations = buildDecorations(update.view);
+			return;
+		}
+
+		if (selectionSet) {
+			const { from, to } = update.state.selection.main;
+			const newPos = getCursorScriptPos(this.scriptRanges, from, to);
+
+			if (newPos !== this.cursorScriptPos) {
+				this.cursorScriptPos = newPos;
+				this.decorations = buildDecorations(update.view);
+			}
+		}
+	}
+}
+
+const subscriptSuperscriptPlugin = ViewPlugin.fromClass(
+	SubscriptSuperscriptPlugin,
+	{
+		decorations: (v) => v.decorations
+	}
+);
+
+/**
+ * Base theme for subscript and superscript.
+ */
+const baseTheme = EditorView.baseTheme({
+	'.cm-superscript': {
+		verticalAlign: 'super',
+		fontSize: '0.75em',
+		color: 'var(--cm-superscript-color, inherit)'
+	},
+	'.cm-subscript': {
+		verticalAlign: 'sub',
+		fontSize: '0.75em',
+		color: 'var(--cm-subscript-color, inherit)'
+	}
+});
+

frontend/src/views/editor/extensions/markdown/plugins/table.ts

@@ -0,0 +1,833 @@
+/**
+ * Table plugin for CodeMirror.
+ *
+ * Features:
+ * - Renders markdown tables as beautiful HTML tables
+ * - Lines remain, content hidden, table overlays on top (same as math.ts)
+ * - Shows source when cursor is inside
+ * - Supports alignment (left, center, right)
+ *
+ * Table syntax tree structure from @lezer/markdown:
+ * - Table (root)
+ *   - TableHeader (first row)
+ *     - TableDelimiter (|)
+ *     - TableCell (content)
+ *   - TableDelimiter (separator row |---|---|)
+ *   - TableRow (data rows)
+ *     - TableCell (content)
+ */
+
+import { Extension, Range } from '@codemirror/state';
+import { syntaxTree, foldedRanges } from '@codemirror/language';
+import {
+	ViewPlugin,
+	DecorationSet,
+	Decoration,
+	EditorView,
+	ViewUpdate,
+	WidgetType
+} from '@codemirror/view';
+import { SyntaxNode } from '@lezer/common';
+import { isCursorInRange } from '../util';
+import { LruCache } from '@/common/utils/lruCache';
+import { generateContentHash } from '@/common/utils/hashUtils';
+import DOMPurify from 'dompurify';
+
+// ============================================================================
+// Types and Interfaces
+// ============================================================================
+
+/** Cell alignment type */
+type CellAlign = 'left' | 'center' | 'right';
+
+/** Parsed table data */
+interface TableData {
+	headers: string[];
+	alignments: CellAlign[];
+	rows: string[][];
+}
+
+/** Table range info for tracking */
+interface TableRange {
+	from: number;
+	to: number;
+}
+
+// ============================================================================
+// Cache using LruCache from utils
+// ============================================================================
+
+/** LRU cache for parsed table data - keyed by position for fast lookup */
+const tableCacheByPos = new LruCache<string, { hash: string; data: TableData }>(50);
+
+/** LRU cache for inline markdown rendering */
+const inlineRenderCache = new LruCache<string, string>(200);
+
+/**
+ * Get or parse table data with two-level caching.
+ * First checks position, then verifies content hash only if position matches.
+ * This avoids expensive hash computation on cache miss.
+ */
+function getCachedTableData(
+	state: import('@codemirror/state').EditorState,
+	tableNode: SyntaxNode
+): TableData | null {
+	const posKey = `${tableNode.from}-${tableNode.to}`;
+	
+	// First level: check if we have data for this position
+	const cached = tableCacheByPos.get(posKey);
+	if (cached) {
+		// Second level: verify content hash matches (lazy hash computation)
+		const content = state.sliceDoc(tableNode.from, tableNode.to);
+		const contentHash = generateContentHash(content);
+		if (cached.hash === contentHash) {
+			return cached.data;
+		}
+	}
+	
+	// Cache miss - parse and cache
+	const content = state.sliceDoc(tableNode.from, tableNode.to);
+	const data = parseTableData(state, tableNode);
+	if (data) {
+		tableCacheByPos.set(posKey, {
+			hash: generateContentHash(content),
+			data
+		});
+	}
+	return data;
+}
+
+
+// ============================================================================
+// Parsing Functions (Optimized)
+// ============================================================================
+
+/**
+ * Parse alignment from delimiter row.
+ * Optimized: early returns, minimal string operations.
+ */
+function parseAlignment(delimiterText: string): CellAlign {
+	const len = delimiterText.length;
+	if (len === 0) return 'left';
+	
+	// Find first and last non-space characters
+	let start = 0;
+	let end = len - 1;
+	while (start < len && delimiterText.charCodeAt(start) === 32) start++;
+	while (end > start && delimiterText.charCodeAt(end) === 32) end--;
+	
+	if (start > end) return 'left';
+	
+	const hasLeftColon = delimiterText.charCodeAt(start) === 58; // ':'
+	const hasRightColon = delimiterText.charCodeAt(end) === 58;
+
+	if (hasLeftColon && hasRightColon) return 'center';
+	if (hasRightColon) return 'right';
+	return 'left';
+}
+
+/**
+ * Parse a row text into cells by splitting on |
+ * Optimized: single-pass parsing without multiple string operations.
+ */
+function parseRowText(rowText: string): string[] {
+	const cells: string[] = [];
+	const len = rowText.length;
+	
+	let start = 0;
+	let end = len;
+	
+	// Skip leading whitespace
+	while (start < len && rowText.charCodeAt(start) <= 32) start++;
+	// Skip trailing whitespace
+	while (end > start && rowText.charCodeAt(end - 1) <= 32) end--;
+	
+	// Skip leading |
+	if (start < end && rowText.charCodeAt(start) === 124) start++;
+	// Skip trailing |
+	if (end > start && rowText.charCodeAt(end - 1) === 124) end--;
+	
+	// Parse cells in single pass
+	let cellStart = start;
+	for (let i = start; i <= end; i++) {
+		if (i === end || rowText.charCodeAt(i) === 124) {
+			// Extract and trim cell
+			let cs = cellStart;
+			let ce = i;
+			while (cs < ce && rowText.charCodeAt(cs) <= 32) cs++;
+			while (ce > cs && rowText.charCodeAt(ce - 1) <= 32) ce--;
+			cells.push(rowText.substring(cs, ce));
+			cellStart = i + 1;
+		}
+	}
+	
+	return cells;
+}
+
+/**
+ * Parse table data from syntax tree node.
+ * 
+ * Table syntax tree structure from @lezer/markdown:
+ * - Table (root)
+ *   - TableHeader (contains TableCell children)
+ *   - TableDelimiter (the |---|---| line)
+ *   - TableRow (contains TableCell children)
+ */
+function parseTableData(state: import('@codemirror/state').EditorState, tableNode: SyntaxNode): TableData | null {
+	const headers: string[] = [];
+	const alignments: CellAlign[] = [];
+	const rows: string[][] = [];
+
+	// Get TableHeader
+	const headerNode = tableNode.getChild('TableHeader');
+	if (!headerNode) return null;
+
+	// Get TableCell children from header
+	const headerCells = headerNode.getChildren('TableCell');
+	
+	if (headerCells.length > 0) {
+		// Parse from TableCell nodes
+		for (const cell of headerCells) {
+			const text = state.sliceDoc(cell.from, cell.to).trim();
+			headers.push(text);
+		}
+	} else {
+		// Fallback: parse the entire header row text
+		const headerText = state.sliceDoc(headerNode.from, headerNode.to);
+		const parsedHeaders = parseRowText(headerText);
+		headers.push(...parsedHeaders);
+	}
+
+	if (headers.length === 0) return null;
+
+	// Find delimiter row to get alignments
+	// The delimiter is a direct child of Table
+	let child = tableNode.firstChild;
+	while (child) {
+		if (child.type.name === 'TableDelimiter') {
+			const delimText = state.sliceDoc(child.from, child.to);
+			// Check if this contains --- (alignment row)
+			if (delimText.includes('-')) {
+				const parts = parseRowText(delimText);
+				for (const part of parts) {
+					if (part.includes('-')) {
+						alignments.push(parseAlignment(part));
+					}
+				}
+				break;
+			}
+		}
+		child = child.nextSibling;
+	}
+
+	// Fill missing alignments with 'left'
+	while (alignments.length < headers.length) {
+		alignments.push('left');
+	}
+
+	// Parse data rows
+	const rowNodes = tableNode.getChildren('TableRow');
+	
+	for (const rowNode of rowNodes) {
+		const rowData: string[] = [];
+		const cells = rowNode.getChildren('TableCell');
+		
+		if (cells.length > 0) {
+			// Parse from TableCell nodes
+			for (const cell of cells) {
+				const text = state.sliceDoc(cell.from, cell.to).trim();
+				rowData.push(text);
+			}
+		} else {
+			// Fallback: parse the entire row text
+			const rowText = state.sliceDoc(rowNode.from, rowNode.to);
+			const parsedCells = parseRowText(rowText);
+			rowData.push(...parsedCells);
+		}
+		
+		// Fill missing cells with empty string
+		while (rowData.length < headers.length) {
+			rowData.push('');
+		}
+		rows.push(rowData);
+	}
+
+	return { headers, alignments, rows };
+}
+
+
+// Pre-compiled regex patterns for better performance
+const BOLD_STAR_RE = /\*\*(.+?)\*\*/g;
+const BOLD_UNDER_RE = /__(.+?)__/g;
+const ITALIC_STAR_RE = /\*([^*]+)\*/g;
+const ITALIC_UNDER_RE = /(?<![a-zA-Z])_([^_]+)_(?![a-zA-Z])/g;
+const CODE_RE = /`([^`]+)`/g;
+const LINK_RE = /\[([^\]]+)\]\(([^)]+)\)/g;
+const STRIKE_RE = /~~(.+?)~~/g;
+
+// Regex to detect HTML tags (opening, closing, or self-closing)
+const HTML_TAG_RE = /<[a-zA-Z][^>]*>|<\/[a-zA-Z][^>]*>/;
+
+/**
+ * Sanitize HTML content with DOMPurify.
+ */
+function sanitizeHTML(html: string): string {
+	return DOMPurify.sanitize(html, {
+		ADD_TAGS: ['code', 'strong', 'em', 'del', 'a', 'img', 'br', 'span'],
+		ADD_ATTR: ['href', 'target', 'src', 'alt', 'class', 'style'],
+		ALLOW_DATA_ATTR: true
+	});
+}
+
+/**
+ * Convert inline markdown syntax to HTML.
+ * Handles: **bold**, *italic*, `code`, [link](url), ~~strikethrough~~, and HTML tags
+ * Optimized with pre-compiled regex and LRU caching.
+ */
+function renderInlineMarkdown(text: string): string {
+	// Check cache first
+	const cached = inlineRenderCache.get(text);
+	if (cached !== undefined) return cached;
+	
+	let html = text;
+	
+	// Check if text contains HTML tags
+	const hasHTMLTags = HTML_TAG_RE.test(text);
+	
+	if (hasHTMLTags) {
+		// If contains HTML tags, process markdown first without escaping < >
+		// Bold: **text** or __text__
+		html = html.replace(BOLD_STAR_RE, '<strong>$1</strong>');
+		html = html.replace(BOLD_UNDER_RE, '<strong>$1</strong>');
+		
+		// Italic: *text* or _text_ (but not inside words for _)
+		html = html.replace(ITALIC_STAR_RE, '<em>$1</em>');
+		html = html.replace(ITALIC_UNDER_RE, '<em>$1</em>');
+		
+		// Inline code: `code` - but don't double-process if already has <code>
+		if (!html.includes('<code>')) {
+			html = html.replace(CODE_RE, '<code>$1</code>');
+		}
+		
+		// Links: [text](url)
+		html = html.replace(LINK_RE, '<a href="$2" target="_blank">$1</a>');
+		
+		// Strikethrough: ~~text~~
+		html = html.replace(STRIKE_RE, '<del>$1</del>');
+		
+		// Sanitize HTML for security
+		html = sanitizeHTML(html);
+	} else {
+		// No HTML tags - escape < > and process markdown
+		html = html.replace(/</g, '&lt;').replace(/>/g, '&gt;');
+		
+		// Bold: **text** or __text__
+		html = html.replace(BOLD_STAR_RE, '<strong>$1</strong>');
+		html = html.replace(BOLD_UNDER_RE, '<strong>$1</strong>');
+		
+		// Italic: *text* or _text_ (but not inside words for _)
+		html = html.replace(ITALIC_STAR_RE, '<em>$1</em>');
+		html = html.replace(ITALIC_UNDER_RE, '<em>$1</em>');
+		
+		// Inline code: `code`
+		html = html.replace(CODE_RE, '<code>$1</code>');
+		
+		// Links: [text](url)
+		html = html.replace(LINK_RE, '<a href="$2" target="_blank">$1</a>');
+		
+		// Strikethrough: ~~text~~
+		html = html.replace(STRIKE_RE, '<del>$1</del>');
+	}
+	
+	// Cache result using LRU cache
+	inlineRenderCache.set(text, html);
+	
+	return html;
+}
+
+
+/**
+ * Widget to display rendered table.
+ * Uses absolute positioning to overlay on source lines.
+ * Optimized with innerHTML for faster DOM creation.
+ */
+class TableWidget extends WidgetType {
+	// Cache the generated HTML to avoid regenerating on each toDOM call
+	private cachedHTML: string | null = null;
+
+	constructor(
+		readonly tableData: TableData,
+		readonly lineCount: number,
+		readonly lineHeight: number,
+		readonly visualHeight: number,
+		readonly contentWidth: number
+	) {
+		super();
+	}
+
+	/**
+	 * Build table HTML string (much faster than DOM API for large tables).
+	 */
+	private buildTableHTML(): string {
+		if (this.cachedHTML) return this.cachedHTML;
+
+		// Calculate row heights
+		const headerRatio = 2 / this.lineCount;
+		const dataRowRatio = 1 / this.lineCount;
+		const headerHeight = this.visualHeight * headerRatio;
+		const dataRowHeight = this.visualHeight * dataRowRatio;
+
+		// Build header cells
+		const headerCells = this.tableData.headers.map((header, idx) => {
+			const align = this.tableData.alignments[idx] || 'left';
+			const escapedTitle = header.replace(/"/g, '&quot;');
+			return `<th class="cm-table-align-${align}" title="${escapedTitle}">${renderInlineMarkdown(header)}</th>`;
+		}).join('');
+
+		// Build body rows
+		const bodyRows = this.tableData.rows.map(row => {
+			const cells = row.map((cell, idx) => {
+				const align = this.tableData.alignments[idx] || 'left';
+				const escapedTitle = cell.replace(/"/g, '&quot;');
+				return `<td class="cm-table-align-${align}" title="${escapedTitle}">${renderInlineMarkdown(cell)}</td>`;
+			}).join('');
+			return `<tr style="height:${dataRowHeight}px">${cells}</tr>`;
+		}).join('');
+
+		this.cachedHTML = `<table class="cm-table"><thead><tr style="height:${headerHeight}px">${headerCells}</tr></thead><tbody>${bodyRows}</tbody></table>`;
+		return this.cachedHTML;
+	}
+
+	toDOM(): HTMLElement {
+		const container = document.createElement('div');
+		container.className = 'cm-table-container';
+		container.style.height = `${this.visualHeight}px`;
+
+		const tableWrapper = document.createElement('div');
+		tableWrapper.className = 'cm-table-wrapper';
+		tableWrapper.style.maxWidth = `${this.contentWidth}px`;
+		tableWrapper.style.maxHeight = `${this.visualHeight}px`;
+
+		// Use innerHTML for faster DOM creation (single parse vs many createElement calls)
+		tableWrapper.innerHTML = this.buildTableHTML();
+
+		container.appendChild(tableWrapper);
+		return container;
+	}
+
+	eq(other: TableWidget): boolean {
+		// Quick dimension checks first (most likely to differ)
+		if (this.visualHeight !== other.visualHeight ||
+			this.contentWidth !== other.contentWidth ||
+			this.lineCount !== other.lineCount) {
+			return false;
+		}
+		
+		// Use reference equality for tableData if same object
+		if (this.tableData === other.tableData) return true;
+		
+		// Quick length checks
+		const headers1 = this.tableData.headers;
+		const headers2 = other.tableData.headers;
+		const rows1 = this.tableData.rows;
+		const rows2 = other.tableData.rows;
+		
+		if (headers1.length !== headers2.length || rows1.length !== rows2.length) {
+			return false;
+		}
+
+		// Compare headers (usually short)
+		for (let i = 0, len = headers1.length; i < len; i++) {
+			if (headers1[i] !== headers2[i]) return false;
+		}
+
+		// Compare rows
+		for (let i = 0, rowLen = rows1.length; i < rowLen; i++) {
+			const row1 = rows1[i];
+			const row2 = rows2[i];
+			if (row1.length !== row2.length) return false;
+			for (let j = 0, cellLen = row1.length; j < cellLen; j++) {
+				if (row1[j] !== row2[j]) return false;
+			}
+		}
+
+		return true;
+	}
+
+	ignoreEvent(): boolean {
+		return false;
+	}
+}
+
+// ============================================================================
+// Decorations
+// ============================================================================
+
+/**
+ * Check if a range overlaps with any folded region.
+ */
+function isInFoldedRange(view: EditorView, from: number, to: number): boolean {
+	const folded = foldedRanges(view.state);
+	const cursor = folded.iter();
+	while (cursor.value) {
+		// Check if ranges overlap
+		if (cursor.from < to && cursor.to > from) {
+			return true;
+		}
+		cursor.next();
+	}
+	return false;
+}
+
+/** Result of building decorations - includes both decorations and table ranges */
+interface BuildResult {
+	decorations: DecorationSet;
+	tableRanges: TableRange[];
+}
+
+/**
+ * Build decorations for tables and collect table ranges in a single pass.
+ * Optimized: single syntax tree traversal instead of two separate ones.
+ */
+function buildDecorationsAndRanges(view: EditorView): BuildResult {
+	const decorations: Range<Decoration>[] = [];
+	const tableRanges: TableRange[] = [];
+	const contentWidth = view.contentDOM.clientWidth - 10;
+	const lineHeight = view.defaultLineHeight;
+
+	// Pre-create the line decoration to reuse (same class for all hidden lines)
+	const hiddenLineDecoration = Decoration.line({ class: 'cm-table-line-hidden' });
+
+	for (const { from, to } of view.visibleRanges) {
+		syntaxTree(view.state).iterate({
+			from,
+			to,
+			enter: ({ type, from: nodeFrom, to: nodeTo, node }) => {
+				if (type.name !== 'Table') return;
+
+				// Always collect table ranges for selection tracking
+				tableRanges.push({ from: nodeFrom, to: nodeTo });
+
+				// Skip rendering if table is in a folded region
+				if (isInFoldedRange(view, nodeFrom, nodeTo)) return;
+
+				// Skip rendering if cursor/selection is in table range
+				if (isCursorInRange(view.state, [nodeFrom, nodeTo])) return;
+
+				// Get cached or parse table data
+				const tableData = getCachedTableData(view.state, node);
+				if (!tableData) return;
+
+				// Calculate line info
+				const startLine = view.state.doc.lineAt(nodeFrom);
+				const endLine = view.state.doc.lineAt(nodeTo);
+				const lineCount = endLine.number - startLine.number + 1;
+
+				// Get visual height using lineBlockAt (includes wrapped lines)
+				const startBlock = view.lineBlockAt(nodeFrom);
+				const endBlock = view.lineBlockAt(nodeTo);
+				const visualHeight = endBlock.bottom - startBlock.top;
+
+				// Add line decorations to hide content (reuse decoration object)
+				for (let lineNum = startLine.number; lineNum <= endLine.number; lineNum++) {
+					const line = view.state.doc.line(lineNum);
+					decorations.push(hiddenLineDecoration.range(line.from));
+				}
+
+				// Add widget on the first line (positioned absolutely)
+				decorations.push(
+					Decoration.widget({
+						widget: new TableWidget(tableData, lineCount, lineHeight, visualHeight, contentWidth),
+						side: -1
+					}).range(startLine.from)
+				);
+			}
+		});
+	}
+
+	return {
+		decorations: Decoration.set(decorations, true),
+		tableRanges
+	};
+}
+
+// ============================================================================
+// Plugin
+// ============================================================================
+
+/**
+ * Find which table the selection is in (if any).
+ * Returns table index or -1 if not in any table.
+ * Optimized: early exit on first match.
+ */
+function findSelectionTableIndex(
+	selectionRanges: readonly { from: number; to: number }[],
+	tableRanges: TableRange[]
+): number {
+	// Early exit if no tables
+	if (tableRanges.length === 0) return -1;
+	
+	for (const sel of selectionRanges) {
+		const selFrom = sel.from;
+		const selTo = sel.to;
+		for (let i = 0; i < tableRanges.length; i++) {
+			const table = tableRanges[i];
+			// Inline overlap check (avoid function call overhead)
+			if (selFrom <= table.to && table.from <= selTo) {
+				return i;
+			}
+		}
+	}
+	return -1;
+}
+
+/**
+ * Table plugin with optimized update detection.
+ * 
+ * Performance optimizations:
+ * - Single syntax tree traversal (buildDecorationsAndRanges)
+ * - Tracks table ranges to minimize unnecessary rebuilds
+ * - Only rebuilds when selection enters/exits table OR switches between tables
+ * - Detects both cursor position AND selection range changes
+ */
+class TablePlugin {
+	decorations: DecorationSet;
+	private tableRanges: TableRange[] = [];
+	private lastContentWidth: number = 0;
+	// Track last selection state for comparison
+	private lastSelectionFrom: number = -1;
+	private lastSelectionTo: number = -1;
+	// Track which table the selection is in (-1 = not in any table)
+	private lastTableIndex: number = -1;
+
+	constructor(view: EditorView) {
+		const result = buildDecorationsAndRanges(view);
+		this.decorations = result.decorations;
+		this.tableRanges = result.tableRanges;
+		this.lastContentWidth = view.contentDOM.clientWidth;
+		// Initialize selection tracking
+		const mainSel = view.state.selection.main;
+		this.lastSelectionFrom = mainSel.from;
+		this.lastSelectionTo = mainSel.to;
+		this.lastTableIndex = findSelectionTableIndex(view.state.selection.ranges, this.tableRanges);
+	}
+
+	update(update: ViewUpdate) {
+		const view = update.view;
+		const currentContentWidth = view.contentDOM.clientWidth;
+		
+		// Check if content width changed (requires rebuild for proper sizing)
+		const widthChanged = Math.abs(currentContentWidth - this.lastContentWidth) > 1;
+		if (widthChanged) {
+			this.lastContentWidth = currentContentWidth;
+		}
+
+		// Full rebuild needed for:
+		// - Document changes (table content may have changed)
+		// - Viewport changes (new tables may be visible)
+		// - Geometry changes (folding, line height changes)
+		// - Width changes (table needs resizing)
+		if (update.docChanged || update.viewportChanged || update.geometryChanged || widthChanged) {
+			const result = buildDecorationsAndRanges(view);
+			this.decorations = result.decorations;
+			this.tableRanges = result.tableRanges;
+			// Update selection tracking
+			const mainSel = update.state.selection.main;
+			this.lastSelectionFrom = mainSel.from;
+			this.lastSelectionTo = mainSel.to;
+			this.lastTableIndex = findSelectionTableIndex(update.state.selection.ranges, this.tableRanges);
+			return;
+		}
+
+		// For selection changes, check if selection moved in/out of a table OR between tables
+		if (update.selectionSet) {
+			const mainSel = update.state.selection.main;
+			const selectionChanged = mainSel.from !== this.lastSelectionFrom || 
+			                         mainSel.to !== this.lastSelectionTo;
+			
+			if (selectionChanged) {
+				// Find which table (if any) the selection is now in
+				const currentTableIndex = findSelectionTableIndex(update.state.selection.ranges, this.tableRanges);
+				
+				// Rebuild if selection moved to a different table (including in/out)
+				if (currentTableIndex !== this.lastTableIndex) {
+					const result = buildDecorationsAndRanges(view);
+					this.decorations = result.decorations;
+					this.tableRanges = result.tableRanges;
+					// Re-check after rebuild (table ranges may have changed)
+					this.lastTableIndex = findSelectionTableIndex(update.state.selection.ranges, this.tableRanges);
+				} else {
+					this.lastTableIndex = currentTableIndex;
+				}
+				
+				// Update tracking state
+				this.lastSelectionFrom = mainSel.from;
+				this.lastSelectionTo = mainSel.to;
+			}
+		}
+	}
+}
+
+const tablePlugin = ViewPlugin.fromClass(
+	TablePlugin,
+	{
+		decorations: (v) => v.decorations
+	}
+);
+
+// ============================================================================
+// Theme
+// ============================================================================
+
+/**
+ * Base theme for tables.
+ */
+const baseTheme = EditorView.baseTheme({
+	// Table container - same as math.ts
+	'.cm-table-container': {
+		position: 'absolute',
+		display: 'flex',
+		justifyContent: 'flex-start',
+		alignItems: 'flex-start',
+		pointerEvents: 'none',
+		zIndex: '2',
+        overflow: 'hidden',
+	},
+
+	// Table wrapper - scrollable when needed
+	'.cm-table-wrapper': {
+		display: 'inline-block',
+		pointerEvents: 'auto',
+		backgroundColor: 'var(--bg-primary)',
+		overflowX: 'auto',
+		overflowY: 'auto',
+	},
+
+	// Table styles - use inset box-shadow for outer border (not clipped by overflow)
+	'.cm-table': {
+		borderCollapse: 'separate',
+		borderSpacing: '0',
+		fontSize: 'inherit',
+		fontFamily: 'inherit',
+		lineHeight: 'inherit',
+		backgroundColor: 'var(--cm-table-bg)',
+		border: 'none',
+		boxShadow: 'inset 0 0 0 1px var(--cm-table-border)',
+		color: 'var(--text-primary) !important',
+	},
+
+	'.cm-table th, .cm-table td': {
+		padding: '0 8px',
+		border: 'none',
+		color: 'inherit !important',
+		verticalAlign: 'middle',
+		boxSizing: 'border-box',
+		fontSize: 'inherit',
+		fontFamily: 'inherit',
+		lineHeight: 'inherit',
+		// Prevent text wrapping to maintain row height
+		whiteSpace: 'nowrap',
+		overflow: 'hidden',
+		textOverflow: 'ellipsis',
+		maxWidth: '300px',
+	},
+
+	// Data cells: left divider + bottom divider
+	'.cm-table td': {
+		boxShadow: '-1px 0 0 var(--cm-table-border), 0 1px 0 var(--cm-table-border)',
+	},
+
+	// First column data cells: only bottom divider
+	'.cm-table td:first-child': {
+		boxShadow: '0 1px 0 var(--cm-table-border)',
+	},
+
+	// Last row data cells: only left divider (no bottom)
+	'.cm-table tbody tr:last-child td': {
+		boxShadow: '-1px 0 0 var(--cm-table-border)',
+	},
+
+	// Last row first column: no dividers
+	'.cm-table tbody tr:last-child td:first-child': {
+		boxShadow: 'none',
+	},
+
+	'.cm-table th': {
+		backgroundColor: 'var(--cm-table-header-bg)',
+		fontWeight: '600',
+		// Header cells: left divider + bottom divider
+		boxShadow: '-1px 0 0 var(--cm-table-border), 0 1px 0 var(--cm-table-border)',
+	},
+
+	'.cm-table th:first-child': {
+		// First header cell: only bottom divider
+		boxShadow: '0 1px 0 var(--cm-table-border)',
+	},
+
+	'.cm-table tbody tr:hover': {
+		backgroundColor: 'var(--cm-table-row-hover)',
+	},
+
+	// Alignment classes - use higher specificity to override default
+	'.cm-table th.cm-table-align-left, .cm-table td.cm-table-align-left': {
+		textAlign: 'left',
+	},
+
+	'.cm-table th.cm-table-align-center, .cm-table td.cm-table-align-center': {
+		textAlign: 'center',
+	},
+
+	'.cm-table th.cm-table-align-right, .cm-table td.cm-table-align-right': {
+		textAlign: 'right',
+	},
+
+	// Inline elements in table cells
+	'.cm-table code': {
+		backgroundColor: 'var(--cm-inline-code-bg, var(--bg-hover))',
+		padding: '1px 4px',
+		borderRadius: '3px',
+		fontSize: 'inherit',
+		fontFamily: 'var(--voidraft-font-mono)',
+	},
+
+	'.cm-table a': {
+		color: 'var(--selection-text)',
+		textDecoration: 'none',
+	},
+
+	'.cm-table a:hover': {
+		textDecoration: 'underline',
+	},
+
+	// Hidden line content for table (text transparent but line preserved)
+	// Use high specificity to override rainbow brackets and other plugins
+	'.cm-line.cm-table-line-hidden': {
+		color: 'transparent !important',
+		caretColor: 'transparent',
+	},
+	'.cm-line.cm-table-line-hidden span': {
+		color: 'transparent !important',
+	},
+	// Override rainbow brackets in hidden table lines
+	'.cm-line.cm-table-line-hidden [class*="cm-rainbow-bracket"]': {
+		color: 'transparent !important',
+	},
+});
+
+
+/**
+ * Table extension.
+ *
+ * Features:
+ * - Parses markdown tables using syntax tree
+ * - Renders tables as beautiful HTML tables
+ * - Table preserves line structure, overlays rendered table
+ * - Shows source when cursor is inside
+ */
+export const table = (): Extension => [
+	tablePlugin,
+	baseTheme
+];
+
+export default table;
+

frontend/src/views/editor/extensions/markdown/state/heading-slug.ts

@@ -0,0 +1,56 @@
+import { syntaxTree } from '@codemirror/language';
+import { EditorState, StateField } from '@codemirror/state';
+import { Slugger } from '../util';
+import {SyntaxNode} from "@lezer/common";
+
+/**
+ * A heading slug is a string that is used to identify/reference
+ * a heading in the document. Heading slugs are URI-compatible and can be used
+ * in permalinks as heading IDs.
+ */
+export interface HeadingSlug {
+	slug: string;
+	pos: number;
+}
+
+/**
+ * A plugin that stores the calculated slugs of the document headings in the
+ * editor state. These can be useful when resolving links to headings inside
+ * the document.
+ */
+export const headingSlugField = StateField.define<HeadingSlug[]>({
+	create: (state) => {
+		const slugs = extractSlugs(state);
+		return slugs;
+	},
+	update: (value, tx) => {
+		if (tx.docChanged) return extractSlugs(tx.state);
+		return value;
+	},
+	compare: (a, b) =>
+		a.length === b.length &&
+		a.every((slug, i) => slug.slug === b[i].slug && slug.pos === b[i].pos)
+});
+
+/**
+ *
+ * @param state - The current editor state.
+ * @returns An array of heading slugs.
+ */
+function extractSlugs(state: EditorState): HeadingSlug[] {
+	const slugs: HeadingSlug[] = [];
+	const slugger = new Slugger();
+	syntaxTree(state).iterate({
+		enter: ({ name, from, to, node }) => {
+			// Capture ATXHeading and SetextHeading
+			if (!name.includes('Heading')) return;
+			const mark: SyntaxNode | null = node.getChild('HeaderMark');
+
+			const headerText = state.sliceDoc(from, to).split('');
+			headerText.splice(mark!.from - from, mark!.to - mark!.from);
+			const slug = slugger.slug(headerText.join('').trim());
+			slugs.push({ slug, pos: from });
+		}
+	});
+	return slugs;
+}

frontend/src/views/editor/extensions/markdown/syntax/footnote.ts

@@ -0,0 +1,259 @@
+/**
+ * Footnote extension for Lezer Markdown parser.
+ *
+ * Parses footnote syntax compatible with MultiMarkdown/PHP Markdown Extra.
+ *
+ * Syntax:
+ * - Footnote reference: [^id] or [^1]
+ * - Footnote definition: [^id]: content (at line start)
+ * - Inline footnote: ^[content] (content is inline, no separate definition needed)
+ *
+ * Examples:
+ * - This is text[^1] with a footnote.
+ * - [^1]: This is the footnote content.
+ * - This is text^[inline footnote content] with inline footnote.
+ */
+
+import { MarkdownConfig, Line, BlockContext, InlineContext } from '@lezer/markdown';
+import { CharCode, isFootnoteIdChar } from '../util';
+
+/**
+ * Parse inline footnote ^[content].
+ * 
+ * @param cx - Inline context
+ * @param pos - Start position (at ^)
+ * @returns Position after element, or -1 if no match
+ */
+function parseInlineFootnote(cx: InlineContext, pos: number): number {
+	const end = cx.end;
+
+	// Minimum: ^[ + content + ] = at least 4 chars
+	if (end < pos + 3) return -1;
+
+	// Track bracket depth for nested brackets
+	let bracketDepth = 1;
+	let hasContent = false;
+	const contentStart = pos + 2;
+
+	for (let i = contentStart; i < end; i++) {
+		const char = cx.char(i);
+
+		// Don't allow newlines
+		if (char === CharCode.Newline) return -1;
+
+		// Track bracket depth
+		if (char === CharCode.OpenBracket) {
+			bracketDepth++;
+		} else if (char === CharCode.CloseBracket) {
+			bracketDepth--;
+			if (bracketDepth === 0) {
+				// Found closing bracket - must have content
+				if (!hasContent) return -1;
+
+				// Create element with marks and content
+				return cx.addElement(cx.elt('InlineFootnote', pos, i + 1, [
+					cx.elt('InlineFootnoteMark', pos, contentStart),
+					cx.elt('InlineFootnoteContent', contentStart, i),
+					cx.elt('InlineFootnoteMark', i, i + 1)
+				]));
+			}
+		} else {
+			hasContent = true;
+		}
+	}
+
+	return -1;
+}
+
+/**
+ * Parse footnote reference [^id].
+ * 
+ * @param cx - Inline context
+ * @param pos - Start position (at [)
+ * @returns Position after element, or -1 if no match
+ */
+function parseFootnoteReference(cx: InlineContext, pos: number): number {
+	const end = cx.end;
+
+	// Minimum: [^ + id + ] = at least 4 chars
+	if (end < pos + 3) return -1;
+
+	let hasValidId = false;
+	const labelStart = pos + 2;
+
+	for (let i = labelStart; i < end; i++) {
+		const char = cx.char(i);
+
+		// Found closing bracket
+		if (char === CharCode.CloseBracket) {
+			if (!hasValidId) return -1;
+
+			// Create element with marks and label
+			return cx.addElement(cx.elt('FootnoteReference', pos, i + 1, [
+				cx.elt('FootnoteReferenceMark', pos, labelStart),
+				cx.elt('FootnoteReferenceLabel', labelStart, i),
+				cx.elt('FootnoteReferenceMark', i, i + 1)
+			]));
+		}
+
+		// Don't allow newlines
+		if (char === CharCode.Newline) return -1;
+
+		// Validate id character using O(1) lookup table
+		if (isFootnoteIdChar(char)) {
+			hasValidId = true;
+		} else {
+			return -1;
+		}
+	}
+
+	return -1;
+}
+
+/**
+ * Parse footnote definition [^id]: content.
+ * 
+ * @param cx - Block context
+ * @param line - Current line
+ * @returns True if parsed successfully
+ */
+function parseFootnoteDefinition(cx: BlockContext, line: Line): boolean {
+	const text = line.text;
+	const len = text.length;
+
+	// Minimum: [^id]: = at least 5 chars
+	if (len < 5) return false;
+
+	// Find ]: pattern - use O(1) lookup for ID chars
+	let labelEnd = 2;
+	while (labelEnd < len) {
+		const char = text.charCodeAt(labelEnd);
+
+		if (char === CharCode.CloseBracket) {
+			// Check for : after ]
+			if (labelEnd + 1 < len && text.charCodeAt(labelEnd + 1) === CharCode.Colon) {
+				break;
+			}
+			return false;
+		}
+
+		// Use O(1) lookup table
+		if (!isFootnoteIdChar(char)) return false;
+
+		labelEnd++;
+	}
+
+	// Validate ]: was found
+	if (labelEnd >= len ||
+		text.charCodeAt(labelEnd) !== CharCode.CloseBracket ||
+		text.charCodeAt(labelEnd + 1) !== CharCode.Colon) {
+		return false;
+	}
+
+	// Calculate positions (all at once to avoid repeated arithmetic)
+	const start = cx.lineStart;
+	const openMarkEnd = start + 2;
+	const labelEndPos = start + labelEnd;
+	const closeMarkEnd = start + labelEnd + 2;
+
+	// Skip optional space after :
+	let contentOffset = labelEnd + 2;
+	if (contentOffset < len) {
+		const spaceChar = text.charCodeAt(contentOffset);
+		if (spaceChar === CharCode.Space || spaceChar === CharCode.Tab) {
+			contentOffset++;
+		}
+	}
+
+	// Build children array
+	const children = [
+		cx.elt('FootnoteDefinitionMark', start, openMarkEnd),
+		cx.elt('FootnoteDefinitionLabel', openMarkEnd, labelEndPos),
+		cx.elt('FootnoteDefinitionMark', labelEndPos, closeMarkEnd)
+	];
+
+	// Add content if present
+	if (contentOffset < len) {
+		children.push(cx.elt('FootnoteDefinitionContent', start + contentOffset, start + len));
+	}
+
+	// Create and add block element
+	cx.addElement(cx.elt('FootnoteDefinition', start, start + len, children));
+	cx.nextLine();
+	return true;
+}
+
+/**
+ * Footnote extension for Lezer Markdown.
+ *
+ * Defines nodes:
+ * - FootnoteReference: Inline reference [^id]
+ * - FootnoteReferenceMark: The [^ and ] delimiters
+ * - FootnoteReferenceLabel: The id part
+ * - FootnoteDefinition: Block definition [^id]: content
+ * - FootnoteDefinitionMark: The [^, ]: delimiters
+ * - FootnoteDefinitionLabel: The id part in definition
+ * - FootnoteDefinitionContent: The content part
+ * - InlineFootnote: Inline footnote ^[content]
+ * - InlineFootnoteMark: The ^[ and ] delimiters
+ * - InlineFootnoteContent: The content part
+ */
+export const Footnote: MarkdownConfig = {
+	defineNodes: [
+		// Inline reference nodes
+		{ name: 'FootnoteReference' },
+		{ name: 'FootnoteReferenceMark' },
+		{ name: 'FootnoteReferenceLabel' },
+		// Block definition nodes
+		{ name: 'FootnoteDefinition', block: true },
+		{ name: 'FootnoteDefinitionMark' },
+		{ name: 'FootnoteDefinitionLabel' },
+		{ name: 'FootnoteDefinitionContent' },
+		// Inline footnote nodes
+		{ name: 'InlineFootnote' },
+		{ name: 'InlineFootnoteMark' },
+		{ name: 'InlineFootnoteContent' },
+	],
+
+	parseInline: [
+		{
+			name: 'InlineFootnote',
+			parse(cx, next, pos) {
+				// Fast path: must start with ^[
+				if (next !== CharCode.Caret || cx.char(pos + 1) !== CharCode.OpenBracket) {
+					return -1;
+				}
+				return parseInlineFootnote(cx, pos);
+			},
+			before: 'Superscript',
+		},
+		{
+			name: 'FootnoteReference',
+			parse(cx, next, pos) {
+				// Fast path: must start with [^
+				if (next !== CharCode.OpenBracket || cx.char(pos + 1) !== CharCode.Caret) {
+					return -1;
+				}
+				return parseFootnoteReference(cx, pos);
+			},
+			before: 'Link',
+		},
+	],
+
+	parseBlock: [
+		{
+			name: 'FootnoteDefinition',
+			parse(cx: BlockContext, line: Line): boolean {
+				// Fast path: must start with [^
+				if (line.text.charCodeAt(0) !== CharCode.OpenBracket ||
+					line.text.charCodeAt(1) !== CharCode.Caret) {
+					return false;
+				}
+				return parseFootnoteDefinition(cx, line);
+			},
+			before: 'LinkReference',
+		},
+	],
+};
+
+export default Footnote;

frontend/src/views/editor/extensions/markdown/syntax/highlight.ts

@@ -0,0 +1,38 @@
+/**
+ * Highlight extension for Lezer Markdown parser.
+ * 
+ * Parses ==highlight== syntax similar to Obsidian/Mark style.
+ * 
+ * Syntax: ==text== → renders as highlighted text
+ * 
+ * Example:
+ * - This is ==important== text → This is <mark>important</mark> text
+ */
+
+import { MarkdownConfig } from '@lezer/markdown';
+import { CharCode, createPairedDelimiterParser } from '../util';
+
+/**
+ * Highlight extension for Lezer Markdown.
+ * Defines:
+ * - Highlight: The container node for highlighted content
+ * - HighlightMark: The == delimiter marks
+ */
+export const Highlight: MarkdownConfig = {
+	defineNodes: [
+		{ name: 'Highlight' },
+		{ name: 'HighlightMark' }
+	],
+	parseInline: [
+		createPairedDelimiterParser({
+			name: 'Highlight',
+			nodeName: 'Highlight',
+			markName: 'HighlightMark',
+			delimChar: CharCode.Equal,
+			isDouble: true,
+			after: 'Emphasis'
+		})
+	]
+};
+
+export default Highlight;

frontend/src/views/editor/extensions/markdown/syntax/insert.ts

@@ -0,0 +1,41 @@
+/**
+ * Insert extension for Lezer Markdown parser.
+ * 
+ * Parses ++insert++ syntax for inserted/underlined text.
+ * 
+ * Syntax: ++text++ → renders as inserted text (underline)
+ * 
+ * Example:
+ * - This is ++inserted++ text → This is <ins>inserted</ins> text
+ */
+
+import { MarkdownConfig } from '@lezer/markdown';
+import { CharCode, createPairedDelimiterParser } from '../util';
+
+/**
+ * Insert extension for Lezer Markdown.
+ * 
+ * Uses optimized factory function for O(n) single-pass parsing.
+ * 
+ * Defines:
+ * - Insert: The container node for inserted content
+ * - InsertMark: The ++ delimiter marks
+ */
+export const Insert: MarkdownConfig = {
+	defineNodes: [
+		{ name: 'Insert' },
+		{ name: 'InsertMark' }
+	],
+	parseInline: [
+		createPairedDelimiterParser({
+			name: 'Insert',
+			nodeName: 'Insert',
+			markName: 'InsertMark',
+			delimChar: CharCode.Plus,
+			isDouble: true,
+			after: 'Emphasis'
+		})
+	]
+};
+
+export default Insert;

frontend/src/views/editor/extensions/markdown/syntax/math.ts

@@ -0,0 +1,146 @@
+/**
+ * Math extension for Lezer Markdown parser.
+ * 
+ * Parses LaTeX math syntax:
+ * - Inline math: $E=mc^2$ → renders as inline formula
+ * - Block math: $$...$$ → renders as block formula (can be multi-line)
+ */
+
+import { MarkdownConfig, InlineContext } from '@lezer/markdown';
+import { CharCode } from '../util';
+
+/**
+ * Parse block math ($$...$$).
+ * Allows multi-line content and handles escaped $.
+ * 
+ * @param cx - Inline context
+ * @param pos - Start position (at first $)
+ * @returns Position after element, or -1 if no match
+ */
+function parseBlockMath(cx: InlineContext, pos: number): number {
+	const end = cx.end;
+	
+	// Don't match $$$ or more
+	if (cx.char(pos + 2) === CharCode.Dollar) return -1;
+
+	// Minimum: $$ + content + $$ = at least 5 chars
+	const minEnd = pos + 4;
+	if (end < minEnd) return -1;
+
+	// Search for closing $$
+	const searchEnd = end - 1;
+	for (let i = pos + 2; i < searchEnd; i++) {
+		const char = cx.char(i);
+
+		// Skip escaped $ (backslash followed by any char)
+		if (char === CharCode.Backslash) {
+			i++; // Skip next char
+			continue;
+		}
+
+		// Found potential closing $$
+		if (char === CharCode.Dollar) {
+			const nextChar = cx.char(i + 1);
+			if (nextChar !== CharCode.Dollar) continue;
+			
+			// Don't match $$$
+			if (i + 2 < end && cx.char(i + 2) === CharCode.Dollar) continue;
+
+			// Ensure content exists
+			if (i === pos + 2) return -1;
+
+			// Create element with marks
+			return cx.addElement(cx.elt('BlockMath', pos, i + 2, [
+				cx.elt('BlockMathMark', pos, pos + 2),
+				cx.elt('BlockMathMark', i, i + 2)
+			]));
+		}
+	}
+
+	return -1;
+}
+
+/**
+ * Parse inline math ($...$).
+ * Single line only, handles escaped $.
+ * 
+ * @param cx - Inline context
+ * @param pos - Start position (at $)
+ * @returns Position after element, or -1 if no match
+ */
+function parseInlineMath(cx: InlineContext, pos: number): number {
+	const end = cx.end;
+
+	// Don't match if preceded by backslash (escaped)
+	if (pos > 0 && cx.char(pos - 1) === CharCode.Backslash) return -1;
+
+	// Minimum: $ + content + $ = at least 3 chars
+	if (end < pos + 2) return -1;
+
+	// Search for closing $
+	for (let i = pos + 1; i < end; i++) {
+		const char = cx.char(i);
+
+		// Newline not allowed in inline math
+		if (char === CharCode.Newline) return -1;
+
+		// Skip escaped $
+		if (char === CharCode.Backslash && i + 1 < end && cx.char(i + 1) === CharCode.Dollar) {
+			i++; // Skip next char
+			continue;
+		}
+
+		// Found potential closing $
+		if (char === CharCode.Dollar) {
+			// Don't match $$
+			if (i + 1 < end && cx.char(i + 1) === CharCode.Dollar) continue;
+
+			// Ensure content exists
+			if (i === pos + 1) return -1;
+
+			// Create element with marks
+			return cx.addElement(cx.elt('InlineMath', pos, i + 1, [
+				cx.elt('InlineMathMark', pos, pos + 1),
+				cx.elt('InlineMathMark', i, i + 1)
+			]));
+		}
+	}
+
+	return -1;
+}
+
+/**
+ * Math extension for Lezer Markdown.
+ * 
+ * Defines:
+ * - InlineMath: Inline math formula $...$
+ * - InlineMathMark: The $ delimiter marks for inline
+ * - BlockMath: Block math formula $$...$$
+ * - BlockMathMark: The $$ delimiter marks for block
+ */
+export const Math: MarkdownConfig = {
+	defineNodes: [
+		{ name: 'InlineMath' },
+		{ name: 'InlineMathMark' },
+		{ name: 'BlockMath' },
+		{ name: 'BlockMathMark' }
+	],
+	parseInline: [
+		{
+			name: 'Math',
+			parse(cx, next, pos) {
+				// Fast path: must start with $
+				if (next !== CharCode.Dollar) return -1;
+
+				// Check for $$ (block math) vs $ (inline math)
+				const isBlock = cx.char(pos + 1) === CharCode.Dollar;
+				
+				return isBlock ? parseBlockMath(cx, pos) : parseInlineMath(cx, pos);
+			},
+			// Parse after emphasis to avoid conflicts
+			after: 'Emphasis'
+		}
+	]
+};
+
+export default Math;

frontend/src/views/editor/extensions/markdown/util.ts

@@ -0,0 +1,202 @@
+import { Decoration } from '@codemirror/view';
+import { EditorState } from '@codemirror/state';
+import type { InlineContext, InlineParser } from '@lezer/markdown';
+
+/**
+ * ASCII character codes for common delimiters.
+ */
+export const enum CharCode {
+	Space = 32,
+	Tab = 9,
+	Newline = 10,
+	Backslash = 92,
+	Dollar = 36,       // $
+	Plus = 43,         // +
+	Equal = 61,        // =
+	OpenBracket = 91,  // [
+	CloseBracket = 93, // ]
+	Caret = 94,        // ^
+	Colon = 58,        // :
+	Hyphen = 45,       // -
+	Underscore = 95,   // _
+}
+
+/**
+ * Pre-computed lookup table for footnote ID characters.
+ * Valid characters: 0-9, A-Z, a-z, _, -
+ * Uses Uint8Array for memory efficiency and O(1) lookup.
+ */
+const FOOTNOTE_ID_CHARS = new Uint8Array(128);
+// Initialize lookup table (0-9: 48-57, A-Z: 65-90, a-z: 97-122, _: 95, -: 45)
+for (let i = 48; i <= 57; i++) FOOTNOTE_ID_CHARS[i] = 1;  // 0-9
+for (let i = 65; i <= 90; i++) FOOTNOTE_ID_CHARS[i] = 1;  // A-Z
+for (let i = 97; i <= 122; i++) FOOTNOTE_ID_CHARS[i] = 1; // a-z
+FOOTNOTE_ID_CHARS[95] = 1; // _
+FOOTNOTE_ID_CHARS[45] = 1; // -
+
+/**
+ * O(1) check if a character is valid for footnote ID.
+ * @param code - ASCII character code
+ * @returns True if valid footnote ID character
+ */
+export function isFootnoteIdChar(code: number): boolean {
+	return code < 128 && FOOTNOTE_ID_CHARS[code] === 1;
+}
+
+/**
+ * Configuration for paired delimiter parser factory.
+ */
+export interface PairedDelimiterConfig {
+	/** Parser name */
+	name: string;
+	/** Node name for the container element */
+	nodeName: string;
+	/** Node name for the delimiter marks */
+	markName: string;
+	/** First delimiter character code */
+	delimChar: number;
+	/** Whether delimiter is doubled (e.g., == vs =) */
+	isDouble: true;
+	/** Whether to allow newlines in content */
+	allowNewlines?: boolean;
+	/** Parse order - after which parser */
+	after?: string;
+	/** Parse order - before which parser */
+	before?: string;
+}
+
+/**
+ * Factory function to create a paired delimiter inline parser.
+ * Optimized with:
+ * - Fast path early return
+ * - Minimal function calls in loop
+ * - Pre-computed delimiter length
+ * 
+ * @param config - Parser configuration
+ * @returns InlineParser for MarkdownConfig
+ */
+export function createPairedDelimiterParser(config: PairedDelimiterConfig): InlineParser {
+	const { name, nodeName, markName, delimChar, allowNewlines = false, after, before } = config;
+	const delimLen = 2; // Always double delimiter for these parsers
+
+	return {
+		name,
+		parse(cx: InlineContext, next: number, pos: number): number {
+			// Fast path: check first character
+			if (next !== delimChar) return -1;
+
+			// Check second delimiter character
+			if (cx.char(pos + 1) !== delimChar) return -1;
+
+			// Don't match triple delimiter (e.g., ===, +++)
+			if (cx.char(pos + 2) === delimChar) return -1;
+
+			// Calculate search bounds
+			const searchEnd = cx.end - 1;
+			const contentStart = pos + delimLen;
+
+			// Look for closing delimiter
+			for (let i = contentStart; i < searchEnd; i++) {
+				const char = cx.char(i);
+
+				// Check for newline (unless allowed)
+				if (!allowNewlines && char === CharCode.Newline) return -1;
+
+				// Found potential closing delimiter
+				if (char === delimChar && cx.char(i + 1) === delimChar) {
+					// Don't match triple delimiter
+					if (i + 2 < cx.end && cx.char(i + 2) === delimChar) continue;
+
+					// Create element with marks
+					return cx.addElement(cx.elt(nodeName, pos, i + delimLen, [
+						cx.elt(markName, pos, contentStart),
+						cx.elt(markName, i, i + delimLen)
+					]));
+				}
+			}
+
+			return -1;
+		},
+		...(after && { after }),
+		...(before && { before })
+	};
+}
+
+
+/**
+ * Tuple representation of a range [from, to].
+ */
+export type RangeTuple = [number, number];
+
+/**
+ * Check if two ranges overlap (touch or intersect).
+ * Based on the visual diagram on https://stackoverflow.com/a/25369187
+ *
+ * @param range1 - First range
+ * @param range2 - Second range
+ * @returns True if the ranges overlap
+ */
+export function checkRangeOverlap(
+	range1: RangeTuple,
+	range2: RangeTuple
+): boolean {
+	return range1[0] <= range2[1] && range2[0] <= range1[1];
+}
+
+/**
+ * Check if any of the editor cursors is in the given range.
+ *
+ * @param state - Editor state
+ * @param range - Range to check
+ * @returns True if the cursor is in the range
+ */
+export function isCursorInRange(
+	state: EditorState,
+	range: RangeTuple
+): boolean {
+	return state.selection.ranges.some((selection) =>
+		checkRangeOverlap(range, [selection.from, selection.to])
+	);
+}
+
+/**
+ * Decoration to simply hide anything (replace with nothing).
+ */
+export const invisibleDecoration = Decoration.replace({});
+
+
+/**
+ * Class for generating unique slugs from heading contents.
+ */
+export class Slugger {
+	/** Occurrences for each slug. */
+	private occurrences: Map<string, number> = new Map();
+
+	/**
+	 * Generate a slug from the given content.
+	 *
+	 * @param text - Content to generate the slug from
+	 * @returns The generated slug
+	 */
+	public slug(text: string): string {
+		let slug = text
+			.toLowerCase()
+			.replace(/\s+/g, '-')
+			.replace(/[^\w-]+/g, '');
+
+		const count = this.occurrences.get(slug) || 0;
+		if (count > 0) {
+			slug += '-' + count;
+		}
+		this.occurrences.set(slug, count + 1);
+
+		return slug;
+	}
+
+	/**
+	 * Reset the slugger state.
+	 */
+	public reset(): void {
+		this.occurrences.clear();
+	}
+}

frontend/src/views/editor/extensions/markdownPreview/index.ts

@@ -1,82 +0,0 @@
-/**
- * Markdown 预览扩展主入口
- */
-import { EditorView } from "@codemirror/view";
-import { Compartment } from "@codemirror/state";
-import { useThemeStore } from "@/stores/themeStore";
-import { usePanelStore } from "@/stores/panelStore";
-import { useDocumentStore } from "@/stores/documentStore";
-import { getActiveNoteBlock } from "../codeblock/state";
-import { createMarkdownPreviewTheme } from "./styles";
-import { previewPanelState, previewPanelPlugin, togglePreview, closePreviewWithAnimation } from "./state";
-
-/**
- * 切换预览面板的命令
- */
-export function toggleMarkdownPreview(view: EditorView): boolean {
-  const panelStore = usePanelStore();
-  const documentStore = useDocumentStore();
-  const currentState = view.state.field(previewPanelState, false);
-  const activeBlock = getActiveNoteBlock(view.state as any);
-  
-  // 如果当前没有激活的 Markdown 块，不执行操作
-  if (!activeBlock || activeBlock.language.name.toLowerCase() !== 'md') {
-    return false;
-  }
-  
-  // 获取当前文档ID
-  const currentDocumentId = documentStore.currentDocumentId;
-  if (currentDocumentId === null) {
-    return false;
-  }
-  
-  // 如果预览面板已打开（无论预览的是不是当前块），关闭预览
-  if (panelStore.markdownPreview.isOpen && !panelStore.markdownPreview.isClosing) {
-    // 使用带动画的关闭函数
-    closePreviewWithAnimation(view);
-  } else {
-    // 否则，打开当前块的预览
-    view.dispatch({
-      effects: togglePreview.of({
-        documentId: currentDocumentId,
-        blockFrom: activeBlock.content.from,
-        blockTo: activeBlock.content.to
-      })
-    });
-    
-    // 注意：store 状态由 ViewPlugin 在面板创建成功后更新
-  }
-
-  return true;
-}
-
-/**
- * 导出 Markdown 预览扩展
- */
-const previewThemeCompartment = new Compartment();
-
-const buildPreviewTheme = () => {
-  const themeStore = useThemeStore();
-  const colors = themeStore.currentColors;
-  return colors ? createMarkdownPreviewTheme(colors) : EditorView.baseTheme({});
-};
-
-export function markdownPreviewExtension() {
-  return [
-    previewPanelState,
-    previewPanelPlugin,
-    previewThemeCompartment.of(buildPreviewTheme())
-  ];
-}
-
-export function updateMarkdownPreviewTheme(view: EditorView): void {
-  if (!view?.dispatch) return;
-
-  try {
-    view.dispatch({
-      effects: previewThemeCompartment.reconfigure(buildPreviewTheme())
-    });
-  } catch (error) {
-    console.error("Failed to update markdown preview theme", error);
-  }
-}

frontend/src/views/editor/extensions/markdownPreview/markdownRenderer.ts

@@ -1,117 +0,0 @@
-/**
- * Markdown 渲染器配置和自定义插件
- */
-import MarkdownIt from 'markdown-it';
-import {tasklist} from "@mdit/plugin-tasklist";
-import {katex} from "@mdit/plugin-katex";
-import markPlugin from "@/common/markdown-it/plugins/markdown-it-mark";
-import hljs from 'highlight.js';
-import 'highlight.js/styles/default.css';
-import {full as emoji} from '@/common/markdown-it/plugins/markdown-it-emojis/'
-import footnote_plugin from "@/common/markdown-it/plugins/markdown-it-footnote"
-import sup_plugin from "@/common/markdown-it/plugins/markdown-it-sup"
-import ins_plugin from "@/common/markdown-it/plugins/markdown-it-ins"
-import deflist_plugin from "@/common/markdown-it/plugins/markdown-it-deflist"
-import abbr_plugin from "@/common/markdown-it/plugins/markdown-it-abbr"
-import sub_plugin from "@/common/markdown-it/plugins/markdown-it-sub"
-import {MermaidIt} from "@/common/markdown-it/plugins/markdown-it-mermaid"
-import {useThemeStore} from '@/stores/themeStore'
-
-/**
- * 自定义链接插件：使用 data-href 替代 href，配合事件委托实现自定义跳转
- */
-export function customLinkPlugin(md: MarkdownIt) {
-    // 保存默认的 link_open 渲染器
-    const defaultRender = md.renderer.rules.link_open || function (tokens, idx, options, env, self) {
-        return self.renderToken(tokens, idx, options);
-    };
-
-    // 重写 link_open 渲染器
-    md.renderer.rules.link_open = function (tokens, idx, options, env, self) {
-        const token = tokens[idx];
-
-        // 获取 href 属性
-        const hrefIndex = token.attrIndex('href');
-        if (hrefIndex >= 0) {
-            const href = token.attrs![hrefIndex][1];
-
-            // 添加 data-href 属性保存原始链接
-            token.attrPush(['data-href', href]);
-
-            // 添加 class 用于样式
-            const classIndex = token.attrIndex('class');
-            if (classIndex < 0) {
-                token.attrPush(['class', 'markdown-link']);
-            } else {
-                token.attrs![classIndex][1] += ' markdown-link';
-            }
-
-            // 移除 href 属性，防止默认跳转
-            token.attrs!.splice(hrefIndex, 1);
-        }
-
-        return defaultRender(tokens, idx, options, env, self);
-    };
-}
-
-/**
- * 创建 Markdown-It 实例
- */
-export function createMarkdownRenderer(): MarkdownIt {
-    const themeStore = useThemeStore();
-    const mermaidTheme = themeStore.isDarkMode ? "dark" : "default";
-    
-    return new MarkdownIt({
-        html: true,
-        linkify: true,
-        typographer: true,
-        breaks: true,
-        langPrefix: "language-",
-        highlight: (code, lang) => {
-            // 对于大代码块（>1000行），跳过高亮以提升性能
-            if (code.length > 50000) {
-                return `<pre><code>${code}</code></pre>`;
-            }
-            
-            if (lang && hljs.getLanguage(lang)) {
-                try {
-                    return hljs.highlight(code, {language: lang, ignoreIllegals: true}).value;
-                } catch (error) {
-                    console.warn(`Failed to highlight code block with language: ${lang}`, error);
-                    return code;
-                }
-            }
-            
-            // 对于中等大小的代码块（>5000字符），跳过自动检测
-            if (code.length > 5000) {
-                return code;
-            }
-            
-            // 小代码块才使用自动检测
-            try {
-                return hljs.highlightAuto(code).value;
-            } catch (error) {
-                console.warn('Failed to auto-highlight code block', error);
-                return code;
-            }
-        }
-    })
-        .use(tasklist, {
-            disabled: false,
-        })
-        .use(customLinkPlugin)
-        .use(markPlugin)
-        .use(emoji)
-        .use(footnote_plugin)
-        .use(sup_plugin)
-        .use(ins_plugin)
-        .use(deflist_plugin)
-        .use(abbr_plugin)
-        .use(sub_plugin)
-        .use(katex)
-        .use(MermaidIt, {
-            theme: mermaidTheme
-        });
-}
-
-

frontend/src/views/editor/extensions/markdownPreview/panel.ts

@@ -1,393 +0,0 @@
-/**
- * Markdown 预览面板 UI 组件
- */
-import {EditorView, Panel, ViewUpdate} from "@codemirror/view";
-import MarkdownIt from 'markdown-it';
-import * as runtime from "@wailsio/runtime";
-import {previewPanelState} from "./state";
-import {createMarkdownRenderer} from "./markdownRenderer";
-import {updateMermaidTheme} from "@/common/markdown-it/plugins/markdown-it-mermaid";
-import {useThemeStore} from "@/stores/themeStore";
-import {usePanelStore} from "@/stores/panelStore";
-import {watch} from "vue";
-import {createDebounce} from "@/common/utils/debounce";
-import {morphHTML} from "@/common/utils/domDiff";
-
-/**
- * Markdown 预览面板类
- */
-export class MarkdownPreviewPanel {
-  private md: MarkdownIt;
-  private readonly dom: HTMLDivElement;
-  private readonly resizeHandle: HTMLDivElement;
-  private readonly content: HTMLDivElement;
-  private view: EditorView;
-  private themeUnwatchers: Array<() => void> = [];
-  private lastRenderedContent: string = "";
-  private readonly debouncedUpdate: ReturnType<typeof createDebounce>;
-  private isDestroyed: boolean = false; // 标记面板是否已销毁
-
-  constructor(view: EditorView) {
-    this.view = view;
-    this.md = createMarkdownRenderer();
-
-    // 创建防抖更新函数
-    this.debouncedUpdate = createDebounce(() => {
-      this.updateContentInternal();
-    }, { delay: 500 });
-
-    // 监听主题变化
-    const themeStore = useThemeStore();
-    this.themeUnwatchers.push(
-      watch(() => themeStore.isDarkMode, (isDark) => {
-        const newTheme = isDark ? "dark" : "default";
-        updateMermaidTheme(newTheme);
-        this.resetPreviewContent();
-      })
-    );
-    this.themeUnwatchers.push(
-      watch(
-        () => themeStore.currentColors,
-        () => {
-          this.resetPreviewContent();
-        },
-        { deep: true }
-      )
-    );
-
-    // 创建 DOM 结构
-    this.dom = document.createElement("div");
-    this.dom.className = "cm-markdown-preview-panel";
-
-    this.resizeHandle = document.createElement("div");
-    this.resizeHandle.className = "cm-preview-resize-handle";
-
-    this.content = document.createElement("div");
-    this.content.className = "cm-preview-content";
-
-    this.dom.appendChild(this.resizeHandle);
-    this.dom.appendChild(this.content);
-
-    // 设置默认高度为编辑器高度的一半
-    const defaultHeight = Math.floor(this.view.dom.clientHeight / 2);
-    this.dom.style.height = `${defaultHeight}px`;
-
-    // 初始化拖动功能
-    this.initResize();
-
-    // 初始化链接点击处理
-    this.initLinkHandler();
-
-    // 初始渲染
-    this.updateContentInternal();
-  }
-
-  /**
-   * 初始化链接点击处理（事件委托）
-   */
-  private initLinkHandler(): void {
-    this.content.addEventListener('click', (e) => {
-      const target = e.target as HTMLElement;
-
-      // 查找最近的 <a> 标签
-      let linkElement = target;
-      while (linkElement && linkElement !== this.content) {
-        if (linkElement.tagName === 'A') {
-          const anchor = linkElement as HTMLAnchorElement;
-          const href = anchor.getAttribute('href');
-          
-          // 处理脚注内部锚点链接
-          if (href && href.startsWith('#')) {
-            e.preventDefault();
-            
-            // 在预览面板内查找目标元素
-            const targetId = href.substring(1);
-            
-            // 使用 getElementById 而不是 querySelector，因为 ID 可能包含特殊字符（如冒号）
-            const targetElement = document.getElementById(targetId);
-            
-            if (targetElement && this.content.contains(targetElement)) {
-              // 平滑滚动到目标元素
-              targetElement.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
-            }
-            return;
-          }
-          
-          // 处理带 data-href 的外部链接
-          if (anchor.hasAttribute('data-href')) {
-            e.preventDefault();
-            const url = anchor.getAttribute('data-href');
-            if (url && this.isValidUrl(url)) {
-              runtime.Browser.OpenURL(url);
-            }
-            return;
-          }
-          
-          // 处理其他链接
-          if (href && !href.startsWith('#')) {
-            e.preventDefault();
-            
-            // 只有有效的 URL（http/https/mailto/file 等）才用浏览器打开
-            if (this.isValidUrl(href)) {
-            runtime.Browser.OpenURL(href);
-            } else {
-              // 相对路径或无效链接，显示提示
-              console.warn('Invalid or relative link in preview:', href);
-            }
-            return;
-          }
-        }
-        
-        linkElement = linkElement.parentElement as HTMLElement;
-      }
-    });
-  }
-
-  /**
-   * 检查是否是有效的 URL（包含协议）
-   */
-  private isValidUrl(url: string): boolean {
-    try {
-      // 检查是否包含协议
-      if (url.match(/^[a-zA-Z][a-zA-Z\d+\-.]*:/)) {
-        const parsedUrl = new URL(url);
-        // 允许的协议列表
-        const allowedProtocols = ['http:', 'https:', 'mailto:', 'file:', 'ftp:'];
-        return allowedProtocols.includes(parsedUrl.protocol);
-      }
-      return false;
-    } catch {
-      return false;
-    }
-  }
-
-  /**
-   * 初始化拖动调整高度功能
-   */
-  private initResize(): void {
-    let startY = 0;
-    let startHeight = 0;
-    
-    const onMouseMove = (e: MouseEvent) => {
-      const delta = startY - e.clientY;
-      const maxHeight = this.getMaxHeight();
-      const newHeight = Math.max(100, Math.min(maxHeight, startHeight + delta));
-      this.dom.style.height = `${newHeight}px`;
-    };
-    
-    const onMouseUp = () => {
-      document.removeEventListener("mousemove", onMouseMove);
-      document.removeEventListener("mouseup", onMouseUp);
-      this.resizeHandle.classList.remove("dragging");
-      // 恢复 body 样式
-      document.body.style.cursor = "";
-      document.body.style.userSelect = "";
-    };
-    
-    this.resizeHandle.addEventListener("mousedown", (e) => {
-      e.preventDefault();
-      startY = e.clientY;
-      startHeight = this.dom.offsetHeight;
-      this.resizeHandle.classList.add("dragging");
-      // 设置 body 样式，防止拖动时光标闪烁
-      document.body.style.cursor = "ns-resize";
-      document.body.style.userSelect = "none";
-      document.addEventListener("mousemove", onMouseMove);
-      document.addEventListener("mouseup", onMouseUp);
-    });
-  }
-
-  /**
-   * 动态计算最大高度（编辑器高度）
-   */
-  private getMaxHeight(): number {
-      return this.view.dom.clientHeight;
-  }
-
-  /**
-   * 内部更新预览内容（带缓存 + DOM Diff 优化）
-   */
-  private updateContentInternal(): void {
-    // 如果面板已销毁，直接返回
-    if (this.isDestroyed) {
-      return;
-    }
-
-    try {
-      const state = this.view.state;
-      const currentPreviewState = state.field(previewPanelState, false);
-
-      if (!currentPreviewState) {
-        return;
-      }
-
-      const blockContent = state.doc.sliceString(
-        currentPreviewState.blockFrom, 
-        currentPreviewState.blockTo
-      );
-
-      if (!blockContent || blockContent.trim().length === 0) {
-        return;
-      }
-
-      // 缓存检查：如果内容没变，不重新渲染
-      if (blockContent === this.lastRenderedContent) {
-        return;
-      }
-
-      // 对于大内容，使用异步渲染避免阻塞主线程
-      if (blockContent.length > 1000) {
-        this.renderLargeContentAsync(blockContent);
-      } else {
-        // 小内容使用 DOM Diff 优化渲染
-        this.renderWithDiff(blockContent);
-      }
-
-    } catch (error) {
-      console.warn("Error updating preview content:", error);
-    }
-  }
-
-  /**
-   * 使用 DOM Diff 渲染内容（保留未变化的节点）
-   */
-  private renderWithDiff(content: string): void {
-    // 如果面板已销毁，直接返回
-    if (this.isDestroyed) {
-      return;
-    }
-
-    try {
-      const newHtml = this.md.render(content);
-      
-      // 如果是首次渲染或内容为空，直接设置 innerHTML
-      if (!this.lastRenderedContent || this.content.children.length === 0) {
-        this.content.innerHTML = newHtml;
-      } else {
-        // 使用 DOM Diff 增量更新
-        morphHTML(this.content, newHtml);
-      }
-      
-      this.lastRenderedContent = content;
-    } catch (error) {
-      console.warn("Error rendering with diff:", error);
-      // 降级到直接设置 innerHTML
-      if (!this.isDestroyed) {
-        this.content.innerHTML = this.md.render(content);
-        this.lastRenderedContent = content;
-      }
-    }
-  }
-
-  /**
-   * 异步渲染大内容（使用 DOM Diff 优化）
-   */
-  private renderLargeContentAsync(content: string): void {
-    // 如果面板已销毁，直接返回
-    if (this.isDestroyed) {
-      return;
-    }
-
-    // 如果是首次渲染，显示加载状态
-    if (!this.lastRenderedContent) {
-    this.content.innerHTML = '<div class="markdown-loading">Rendering...</div>';
-    }
-    
-    // 使用 requestIdleCallback 在浏览器空闲时渲染
-    const callback = window.requestIdleCallback || ((cb: IdleRequestCallback) => setTimeout(cb, 1));
-    
-    callback(() => {
-      // 再次检查是否已销毁（异步回调时可能已经关闭）
-      if (this.isDestroyed) {
-        return;
-      }
-
-      try {
-        const html = this.md.render(content);
-        
-        // 如果是首次渲染或之前内容为空，直接设置
-        if (!this.lastRenderedContent || this.content.children.length === 0) {
-        // 使用 DocumentFragment 减少 DOM 操作
-        const fragment = document.createRange().createContextualFragment(html);
-        this.content.innerHTML = '';
-        this.content.appendChild(fragment);
-        } else {
-          // 使用 DOM Diff 增量更新（保留滚动位置和未变化的节点）
-          morphHTML(this.content, html);
-        }
-        
-        this.lastRenderedContent = content;
-      } catch (error) {
-        console.warn("Error rendering large content:", error);
-        if (!this.isDestroyed) {
-        this.content.innerHTML = '<div class="markdown-error">Render failed</div>';
-        }
-      }
-    });
-  }
-
-  private resetPreviewContent(): void {
-    if (this.isDestroyed) {
-      return;
-    }
-
-    this.md = createMarkdownRenderer();
-    this.lastRenderedContent = "";
-    this.updateContentInternal();
-  }
-
-  /**
-   * 响应编辑器更新
-   */
-  public update(update: ViewUpdate): void {
-    if (update.docChanged) {
-      // 文档改变时使用防抖更新
-      this.debouncedUpdate.debouncedFn();
-    } else if (update.selectionSet) {
-      // 光标移动时不触发更新
-      // 如果需要根据光标位置更新，可以在这里处理
-    }
-  }
-
-  /**
-   * 清理资源
-   */
-  public destroy(): void {
-    // 标记为已销毁，防止异步回调继续执行
-    this.isDestroyed = true;
-
-    // 清理防抖
-    if (this.debouncedUpdate) {
-      this.debouncedUpdate.cancel();
-    }
-
-    // 清空缓存
-    this.lastRenderedContent = "";
-
-    if (this.themeUnwatchers.length) {
-      this.themeUnwatchers.forEach(unwatch => unwatch());
-      this.themeUnwatchers = [];
-    }
-  }
-
-  /**
-   * 获取 CodeMirror Panel 对象
-   */
-  public getPanel(): Panel {
-    return {
-      top: false,
-      dom: this.dom,
-      update: (update: ViewUpdate) => this.update(update),
-      destroy: () => this.destroy()
-    };
-  }
-}
-
-/**
- * 创建预览面板
- */
-export function createPreviewPanel(view: EditorView): Panel {
-  const panel = new MarkdownPreviewPanel(view);
-  return panel.getPanel();
-}
-

frontend/src/views/editor/extensions/markdownPreview/state.ts

@@ -1,142 +0,0 @@
-/**
- * Markdown 预览面板的 CodeMirror 状态管理
- */
-import { EditorView, showPanel, ViewUpdate, ViewPlugin } from "@codemirror/view";
-import { StateEffect, StateField } from "@codemirror/state";
-import { getActiveNoteBlock } from "../codeblock/state";
-import { usePanelStore } from "@/stores/panelStore";
-import { createPreviewPanel } from "./panel";
-import type { PreviewState } from "./types";
-
-/**
- * 定义切换预览面板的 Effect
- */
-export const togglePreview = StateEffect.define<PreviewState | null>();
-
-/**
- * 关闭面板（带动画）
- */
-export function closePreviewWithAnimation(view: EditorView): void {
-  const panelStore = usePanelStore();
-  
-  // 标记开始关闭
-  panelStore.startClosingMarkdownPreview();
-  
-  const panelElement = view.dom.querySelector('.cm-panels.cm-panels-bottom') as HTMLElement;
-  if (panelElement) {
-    panelElement.style.animation = 'panelSlideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1)';
-    // 等待动画完成后再关闭面板
-    setTimeout(() => {
-      view.dispatch({
-        effects: togglePreview.of(null)
-      });
-      panelStore.closeMarkdownPreview();
-    }, 280);
-  } else {
-    view.dispatch({
-      effects: togglePreview.of(null)
-    });
-    panelStore.closeMarkdownPreview();
-  }
-}
-
-/**
- * 定义预览面板的状态字段
- */
-export const previewPanelState = StateField.define<PreviewState | null>({
-  create: () => null,
-  update(value, tr) {
-    const panelStore = usePanelStore();
-    
-    for (let e of tr.effects) {
-      if (e.is(togglePreview)) {
-        value = e.value;
-      }
-    }
-    
-    // 如果有预览状态，智能管理预览生命周期
-    if (value && !value.closing) {
-      const activeBlock = getActiveNoteBlock(tr.state as any);
-      
-      // 关键修复：检查预览状态是否属于当前文档
-      // 如果 panelStore 中没有当前文档的预览状态（说明切换了文档），
-      // 则不执行关闭逻辑，保持其他文档的预览状态
-      if (!panelStore.markdownPreview.isOpen) {
-        // 当前文档没有预览，不处理
-        return value;
-      }
-      
-      // 场景1：离开 Markdown 块或无激活块 → 关闭预览
-      if (!activeBlock || activeBlock.language.name.toLowerCase() !== 'md') {
-        if (!panelStore.markdownPreview.isClosing) {
-          return { ...value, closing: true };
-        }
-      } 
-      // 场景2：切换到其他块（起始位置变化）→ 关闭预览
-      else if (activeBlock.content.from !== value.blockFrom) {
-        if (!panelStore.markdownPreview.isClosing) {
-          return { ...value, closing: true };
-        }
-      } 
-      // 场景3：还在同一个块内编辑（只有结束位置变化）→ 更新范围，实时预览
-      else if (activeBlock.content.to !== value.blockTo) {
-        // 更新 panelStore 中的预览范围
-        panelStore.updatePreviewRange(value.blockFrom, activeBlock.content.to);
-        
-        return {
-          documentId: value.documentId,
-          blockFrom: value.blockFrom,
-          blockTo: activeBlock.content.to,
-          closing: false
-        };
-      }
-    }
-    
-    return value;
-  },
-  provide: f => showPanel.from(f, state => state ? createPreviewPanel : null)
-});
-
-/**
- * 创建监听插件
- */
-export const previewPanelPlugin = ViewPlugin.fromClass(class {
-  private lastState: PreviewState | null | undefined = null;
-  private panelStore = usePanelStore();
-
-  constructor(private view: EditorView) {
-    this.lastState = view.state.field(previewPanelState, false);
-    this.panelStore.setEditorView(view);
-  }
-
-  update(update: ViewUpdate) {
-    const currentState = update.state.field(previewPanelState, false);
-    
-    // 检测到面板打开（从 null 变为有值，且不是 closing）
-    if (currentState && !currentState.closing && !this.lastState) {
-      // 验证面板 DOM 是否真正创建成功
-      requestAnimationFrame(() => {
-        const panelElement = this.view.dom.querySelector('.cm-markdown-preview-panel');
-        if (panelElement) {
-          // 面板创建成功，更新 store 状态
-          this.panelStore.openMarkdownPreview(currentState.blockFrom, currentState.blockTo);
-        }
-      });
-    }
-    
-    // 检测到状态变为 closing
-    if (currentState?.closing && !this.lastState?.closing) {
-      // 触发关闭动画
-      closePreviewWithAnimation(this.view);
-    }
-    
-    this.lastState = currentState;
-  }
-  
-  destroy() {
-    // 不调用 reset()，因为那会清空所有文档的预览状态
-    // 只清理编辑器视图引用
-    this.panelStore.setEditorView(null);
-  }
-});
-

frontend/src/views/editor/extensions/markdownPreview/styles.ts

@@ -1,384 +0,0 @@
-import { EditorView } from "@codemirror/view";
-import type { ThemeColors } from "@/views/editor/theme/types";
-
-/**
- * 创建 Markdown 预览面板的主题样式
- */
-export function createMarkdownPreviewTheme(colors: ThemeColors) {
-  // GitHub 官方颜色变量
-  const isDark = colors.dark;
-  
-  // GitHub Light 主题颜色
-  const lightColors = {
-    fg: {
-      default: "#1F2328",
-      muted: "#656d76",
-      subtle: "#6e7781"
-    },
-    border: {
-      default: "#d0d7de",
-      muted: "#d8dee4"
-    },
-    canvas: {
-      default: "#ffffff",
-      subtle: "#f6f8fa"
-    },
-    accent: {
-      fg: "#0969da",
-      emphasis: "#0969da"
-    }
-  };
-  
-  // GitHub Dark 主题颜色
-  const darkColors = {
-    fg: {
-      default: "#e6edf3",
-      muted: "#7d8590",
-      subtle: "#6e7681"
-    },
-    border: {
-      default: "#30363d",
-      muted: "#21262d"
-    },
-    canvas: {
-      default: "#0d1117",
-      subtle: "#161b22"
-    },
-    accent: {
-      fg: "#2f81f7",
-      emphasis: "#2f81f7"
-    }
-  };
-  
-  const ghColors = isDark ? darkColors : lightColors;
-  
-  return EditorView.theme({
-    // 面板容器
-    ".cm-markdown-preview-panel": {
-      position: "relative",
-      display: "flex",
-      flexDirection: "column",
-      overflow: "hidden"
-    },
-
-    // 拖动调整大小的手柄
-    ".cm-preview-resize-handle": {
-      width: "100%",
-      height: "3px",
-      backgroundColor: colors.borderColor,
-      cursor: "ns-resize",
-      position: "relative",
-      flexShrink: 0,
-      transition: "background-color 0.2s ease",
-      "&:hover": {
-        backgroundColor: colors.selection
-      },
-      "&.dragging": {
-        backgroundColor: colors.selection
-      }
-    },
-
-      // 面板动画效果
-      '.cm-panels.cm-panels-top': {
-          borderBottom: '2px solid black'
-      },
-      '.cm-panels.cm-panels-bottom': {
-          animation: 'panelSlideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1)'
-      },
-      '@keyframes panelSlideUp': {
-          from: {
-              transform: 'translateY(100%)',
-              opacity: '0'
-          },
-          to: {
-              transform: 'translateY(0)',
-              opacity: '1'
-          }
-      },
-      '@keyframes panelSlideDown': {
-          from: {
-              transform: 'translateY(0)',
-              opacity: '1'
-          },
-          to: {
-              transform: 'translateY(100%)',
-              opacity: '0'
-          }
-      },
-
-    // 内容区域
-    ".cm-preview-content": {
-      flex: 1,
-      padding: "45px",
-      overflow: "auto",
-      fontSize: "16px",
-      lineHeight: "1.5",
-      color: ghColors.fg.default,
-      wordWrap: "break-word",
-      fontFamily: "-apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji'",
-      boxSizing: "border-box",
-      
-      // Loading state
-      "& .markdown-loading, & .markdown-error": {
-        display: "flex",
-        alignItems: "center",
-        justifyContent: "center",
-        minHeight: "200px",
-        fontSize: "14px",
-        color: ghColors.fg.muted
-      },
-      
-      "& .markdown-error": {
-        color: "#f85149"
-      },
-      
-      // ========== 标题样式 ==========
-      "& h1, & h2, & h3, & h4, & h5, & h6": {
-        marginTop: "24px",
-        marginBottom: "16px",
-        fontWeight: "600",
-        lineHeight: "1.25",
-        color: ghColors.fg.default
-      },
-      "& h1": {
-        fontSize: "2em",
-        borderBottom: `1px solid ${ghColors.border.muted}`,
-        paddingBottom: "0.3em"
-      },
-      "& h2": {
-        fontSize: "1.5em",
-        borderBottom: `1px solid ${ghColors.border.muted}`,
-        paddingBottom: "0.3em"
-      },
-      "& h3": {
-        fontSize: "1.25em"
-      },
-      "& h4": {
-        fontSize: "1em"
-      },
-      "& h5": {
-        fontSize: "0.875em"
-      },
-      "& h6": {
-        fontSize: "0.85em",
-        color: ghColors.fg.muted
-      },
-
-      // ========== 段落和文本 ==========
-      "& p": {
-        marginTop: "0",
-        marginBottom: "16px"
-      },
-      "& strong": {
-        fontWeight: "600"
-      },
-      "& em": {
-        fontStyle: "italic"
-      },
-      "& del": {
-        textDecoration: "line-through",
-        opacity: "0.7"
-      },
-
-      // ========== 列表 ==========
-      "& ul, & ol": {
-        paddingLeft: "2em",
-        marginTop: "0",
-        marginBottom: "16px"
-      },
-      "& ul ul, & ul ol, & ol ol, & ol ul": {
-        marginTop: "0",
-        marginBottom: "0"
-      },
-      "& li": {
-        wordWrap: "break-all"
-      },
-      "& li > p": {
-        marginTop: "16px"
-      },
-      "& li + li": {
-        marginTop: "0.25em"
-      },
-
-      // 任务列表
-      "& .task-list-item": {
-        listStyleType: "none",
-        position: "relative",
-        paddingLeft: "1.5em"
-      },
-      "& .task-list-item + .task-list-item": {
-        marginTop: "3px"
-      },
-      "& .task-list-item input[type='checkbox']": {
-        font: "inherit",
-        overflow: "visible",
-        fontFamily: "inherit",
-        fontSize: "inherit",
-        lineHeight: "inherit",
-        boxSizing: "border-box",
-        padding: "0",
-        margin: "0 0.2em 0.25em -1.6em",
-        verticalAlign: "middle",
-        cursor: "pointer"
-      },
-
-      // ========== 代码块 ==========
-      "& code, & tt": {
-        fontFamily: "SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace",
-        fontSize: "85%",
-        padding: "0.2em 0.4em",
-        margin: "0",
-        backgroundColor: isDark ? "rgba(110, 118, 129, 0.4)" : "rgba(27, 31, 35, 0.05)",
-        borderRadius: "3px"
-      },
-      
-      "& pre": {
-        position: "relative",
-        backgroundColor: isDark ? "#161b22" : "#f6f8fa",
-        padding: "40px 16px 16px 16px",
-        borderRadius: "6px",
-        overflow: "auto",
-        margin: "16px 0",
-        fontSize: "85%",
-        lineHeight: "1.45",
-        wordWrap: "normal",
-        
-        // macOS 窗口样式 - 使用伪元素创建顶部栏
-        "&::before": {
-          content: '""',
-          position: "absolute",
-          top: "0",
-          left: "0",
-          right: "0",
-          height: "28px",
-          backgroundColor: isDark ? "#1c1c1e" : "#e8e8e8",
-          borderBottom: `1px solid ${ghColors.border.default}`,
-          borderRadius: "6px 6px 0 0"
-        },
-        
-        // macOS 三个控制按钮
-        "&::after": {
-          content: '""',
-          position: "absolute",
-          top: "10px",
-          left: "12px",
-          width: "12px",
-          height: "12px",
-          borderRadius: "50%",
-          backgroundColor: isDark ? "#ec6a5f" : "#ff5f57",
-          boxShadow: `
-            18px 0 0 0 ${isDark ? "#f4bf4f" : "#febc2e"},
-            36px 0 0 0 ${isDark ? "#61c554" : "#28c840"}
-          `
-        }
-      },
-      
-      "& pre code, & pre tt": {
-        display: "inline",
-        maxWidth: "auto",
-        padding: "0",
-        margin: "0",
-        overflow: "visible",
-        lineHeight: "inherit",
-        wordWrap: "normal",
-        backgroundColor: "transparent",
-        border: "0",
-        fontSize: "100%",
-        color: ghColors.fg.default,
-        wordBreak: "normal",
-        whiteSpace: "pre"
-      },
-
-      // ========== 引用块 ==========
-      "& blockquote": {
-        margin: "16px 0",
-        padding: "0 1em",
-        color: isDark ? "#7d8590" : "#6a737d",
-        borderLeft: isDark ? "0.25em solid #3b434b" : "0.25em solid #dfe2e5"
-      },
-      "& blockquote > :first-child": {
-        marginTop: "0"
-      },
-      "& blockquote > :last-child": {
-        marginBottom: "0"
-      },
-
-      // ========== 分割线 ==========
-      "& hr": {
-        height: "0.25em",
-        padding: "0",
-        margin: "24px 0",
-        backgroundColor: isDark ? "#21262d" : "#e1e4e8",
-        border: "0",
-        overflow: "hidden",
-        boxSizing: "content-box"
-      },
-
-      // ========== 表格 ==========
-      "& table": {
-        borderSpacing: "0",
-        borderCollapse: "collapse",
-        display: "block",
-        width: "100%",
-        overflow: "auto",
-        marginTop: "0",
-        marginBottom: "16px"
-      },
-      "& table tr": {
-        backgroundColor: isDark ? "#0d1117" : "#ffffff",
-        borderTop: isDark ? "1px solid #21262d" : "1px solid #c6cbd1"
-      },
-      "& table th, & table td": {
-        padding: "6px 13px",
-        border: isDark ? "1px solid #30363d" : "1px solid #dfe2e5"
-      },
-      "& table th": {
-        fontWeight: "600"
-      },
-
-      // ========== 链接 ==========
-      "& a, & .markdown-link": {
-        color: isDark ? "#58a6ff" : "#0366d6",
-        textDecoration: "none",
-        cursor: "pointer",
-        "&:hover": {
-          textDecoration: "underline"
-        }
-      },
-
-      // ========== 图片 ==========
-      "& img": {
-        maxWidth: "100%",
-        height: "auto",
-        borderRadius: "4px",
-        margin: "16px 0"
-      },
-
-      // ========== 其他元素 ==========
-      "& kbd": {
-        display: "inline-block",
-        padding: "3px 5px",
-        fontSize: "11px",
-        lineHeight: "10px",
-        color: ghColors.fg.default,
-        verticalAlign: "middle",
-        backgroundColor: ghColors.canvas.subtle,
-        border: `solid 1px ${isDark ? "rgba(110, 118, 129, 0.4)" : "rgba(175, 184, 193, 0.2)"}`,
-        borderBottom: `solid 2px ${isDark ? "rgba(110, 118, 129, 0.4)" : "rgba(175, 184, 193, 0.2)"}`,
-        borderRadius: "6px",
-        boxShadow: "inset 0 -1px 0 rgba(175, 184, 193, 0.2)"
-      },
-
-      // 首个子元素去除上边距
-      "& > *:first-child": {
-        marginTop: "0 !important"
-      },
-
-      // 最后一个子元素去除下边距
-      "& > *:last-child": {
-        marginBottom: "0 !important"
-      }
-    }
-  }, { dark: colors.dark });
-}
-

frontend/src/views/editor/extensions/markdownPreview/types.ts

@@ -1,12 +0,0 @@
-/**
- * Markdown 预览面板相关类型定义
- */
-
-// 预览面板状态
-export interface PreviewState {
-  documentId: number; // 预览所属的文档ID
-  blockFrom: number;
-  blockTo: number;
-  closing?: boolean; // 标记面板正在关闭
-}
-

frontend/src/views/editor/extensions/rainbowBracket/index.ts

@@ -69,7 +69,7 @@ const rainbowBracketsPlugin = ViewPlugin.fromClass(RainbowBracketsView, {
     decorations: (v) => v.decorations,
 });
 
-export default function rainbowBracketsExtension() {
+export default function index() {
     return [
         rainbowBracketsPlugin,
         EditorView.baseTheme({

frontend/src/views/editor/extensions/spellcheck/spellcheck.ts

@@ -0,0 +1,8 @@
+import type { Extension } from '@codemirror/state'
+import { EditorView } from '@codemirror/view'
+
+export const spellcheck = (): Extension => {
+  return EditorView.contentAttributes.of({
+    spellcheck: 'true',
+  })
+}

frontend/src/views/editor/manager/extensions.ts

@@ -3,7 +3,7 @@ import {ExtensionID} from '@/../bindings/voidraft/internal/models/models';
 import i18n from '@/i18n';
 import {ExtensionDefinition} from './types';
 
-import rainbowBracketsExtension from '../extensions/rainbowBracket/rainbowBracketsExtension';
+import index from '../extensions/rainbowBracket';
 import {createTextHighlighter} from '../extensions/textHighlight';
 import {color} from '../extensions/colorSelector';
 import {hyperLink} from '../extensions/hyperlink';
@@ -28,7 +28,7 @@ const defineExtension = (create: (config: any) => any, defaultConfig: Record<str
 
 const EXTENSION_REGISTRY: Record<RegisteredExtensionID, ExtensionEntry> = {
     [ExtensionID.ExtensionRainbowBrackets]: {
-        definition: defineExtension(() => rainbowBracketsExtension()),
+        definition: defineExtension(() => index()),
         displayNameKey: 'extensions.rainbowBrackets.name',
         descriptionKey: 'extensions.rainbowBrackets.description'
     },

frontend/src/views/editor/theme/light/default-light.ts

@@ -6,7 +6,7 @@ export const defaultLightColors: ThemeColors = {
     dark: false,
 
     background: '#ffffff',
-    backgroundSecondary: '#f4f7fb',
+    backgroundSecondary: '#f1faf1',
 
     foreground: '#24292e',
     cursor: '#000000',

frontend/src/views/editor/theme/light/github-light.ts

@@ -7,7 +7,7 @@ export const config: ThemeColors = {
   dark: false,
 
   background: '#ffffff',
-  backgroundSecondary: '#f1faf1',
+  backgroundSecondary: '##f4f7fb ',
 
   foreground: '#444d56',
   cursor: '#044289',

frontend/src/views/settings/pages/UpdatesPage.vue

@@ -6,19 +6,16 @@ import { useUpdateStore } from '@/stores/updateStore';
 import SettingSection from '../components/SettingSection.vue';
 import SettingItem from '../components/SettingItem.vue';
 import ToggleSwitch from '../components/ToggleSwitch.vue';
-import markdownit from 'markdown-it'
+import { marked } from 'marked';
 
 const { t } = useI18n();
 const configStore = useConfigStore();
 const updateStore = useUpdateStore();
 
-// 初始化Remarkable实例并配置
-const md = markdownit({
-  html: true,       // 允许HTML
-  linkify: false,   // 不解析链接
-  typographer: true, // 开启智能引号
-  xhtmlOut: true,   // 使用xhtml语法输出
-  breaks: true,     // 允许换行
+// 配置marked
+marked.setOptions({
+  breaks: true,      // 允许换行
+  gfm: true,         // GitHub风格Markdown
 });
 
 // 计算属性
@@ -29,10 +26,10 @@ const autoCheckUpdates = computed({
   }
 });
 
-// 使用Remarkable解析Markdown
+// 使用marked解析Markdown
 const parseMarkdown = (markdown: string) => {
   if (!markdown) return '';
-  return md.render(markdown);
+  return marked.parse(markdown) as string;
 };
 
 // 处理更新按钮点击