完善 TipTap 编辑器与个人资料页：头像裁剪、Tab 缩进、文章内链、Markdown 工具与 Tooltip，并更新样式与 Feed 缓存。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/package.json

@@ -32,20 +32,24 @@
     "diff": "^9.0.0",
     "dompurify": "^3.4.10",
     "lucide-react": "^1.18.0",
+    "marked": "^18.0.5",
     "postcss": "^8.5.15",
     "react-dom": "^18.3.1",
+    "react-easy-crop": "^6.0.2",
     "react-hook-form": "^7.79.0",
     "react-router-dom": "^6.28.0",
     "sonner": "^2.0.7",
     "tailwind-merge": "^3.6.0",
     "tailwindcss": "^3.4.19",
     "tailwindcss-animate": "^1.0.7",
+    "turndown": "^7.2.4",
     "zod": "^4.4.3"
   },
   "devDependencies": {
     "@types/node": "^25.9.3",
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.1",
+    "@types/turndown": "^5.0.6",
     "@vitejs/plugin-react": "^4.3.4",
     "typescript": "^5.6.3",
     "vite": "^5.4.11"