🐛 Fixed SQLite time field issue

internal/models/document.go

@@ -6,13 +6,13 @@ import (
 
 // Document represents a document in the system
 type Document struct {
-	ID        int64     `json:"id" db:"id"`
-	Title     string    `json:"title" db:"title"`
-	Content   string    `json:"content" db:"content"`
-	CreatedAt time.Time `json:"createdAt" db:"created_at"`
-	UpdatedAt time.Time `json:"updatedAt" db:"updated_at"`
-	IsDeleted bool      `json:"is_deleted" db:"is_deleted"`
-	IsLocked  bool      `json:"is_locked" db:"is_locked"` // 锁定标志，锁定的文档无法被删除
+	ID        int64  `json:"id" db:"id"`
+	Title     string `json:"title" db:"title"`
+	Content   string `json:"content" db:"content"`
+	CreatedAt string `json:"createdAt" db:"created_at"`
+	UpdatedAt string `json:"updatedAt" db:"updated_at"`
+	IsDeleted bool   `json:"is_deleted" db:"is_deleted"`
+	IsLocked  bool   `json:"is_locked" db:"is_locked"` // 锁定标志，锁定的文档无法被删除
 }
 
 // NewDocument 创建新文档
@@ -21,8 +21,8 @@ func NewDocument(title, content string) *Document {
 	return &Document{
 		Title:     title,
 		Content:   content,
-		CreatedAt: now,
-		UpdatedAt: now,
+		CreatedAt: now.String(),
+		UpdatedAt: now.String(),
 		IsDeleted: false,
 		IsLocked:  false, // 默认不锁定
 	}