✨ Added configuration change notification service

frontend/src/i18n/locales/en-US.ts

@@ -27,6 +27,7 @@ export default {
     tabSizeFixed: 'Tab size ({value}) has been corrected to {fixed}',
     tabTypeFixed: 'Tab type ({value}) is invalid, corrected to spaces',
     alwaysOnTopFailed: 'Failed to set window always on top',
+    alwaysOnTopSuccess: 'Window always on top status updated',
     languageChanged: 'Language setting updated',
     languageChangeFailed: 'Failed to update language setting'
   },
@@ -67,9 +68,15 @@ export default {
     window: 'Window/Application',
     showInSystemTray: 'Show in System Tray',
     alwaysOnTop: 'Always on Top',
+    dataStorage: 'Data Storage',
+    useCustomDataPath: 'Use custom data storage path',
+    selectDirectory: 'Select Directory',
+    selectDataDirectory: 'Select Data Storage Directory',
+    defaultDataPath: 'Default data storage path',
+    enterCustomPath: 'Enter custom data storage path',
+    pathHint: 'Example: C:\\MyData or /home/user/data or relative path ./data',
     bufferFiles: 'Buffer Files Path',
     useCustomLocation: 'Use custom location for buffer files',
-    selectDirectory: 'Select Directory',
     fontSize: 'Font Size',
     fontSizeDescription: 'Editor font size',
     fontSettings: 'Font Settings',