refactor: 移除所有录制功能代码

- 删除录制相关页面组件（RecordReplayPage、ReplayListPage、ReplayPlayerPage）
- 删除录制工具文件（recordEventsDb、recordUtils、useRecorder、tabUtils）
- 清理 background.ts 和 content.ts 中的录制代码
- 更新 App.tsx 移除录制路由
- 清理 messages.tsx 中的消息定义
- 删除 types.tsx 中的录制状态
- 移除 package.json 中的 rrweb 相关依赖
- 更新 wxt.config.ts 移除 offscreen、downloads 权限
- 删除 offscreen 目录

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -24,9 +24,6 @@
     "@emotion/styled": "^11.14.1",
     "@mui/icons-material": "^7.3.8",
     "@mui/material": "^7.3.8",
-    "@rrweb/all": "^2.0.0-alpha.18",
-    "@rrweb/rrweb-plugin-console-record": "^2.0.0-alpha.18",
-    "@rrweb/rrweb-plugin-console-replay": "^2.0.0-alpha.18",
     "@testing-library/dom": "^10.4.1",
     "@testing-library/jest-dom": "^6.9.1",
     "@testing-library/react": "^16.3.1",
@@ -34,15 +31,11 @@
     "@webext-core/messaging": "^2.3.0",
     "date-fns": "^4.1.0",
     "dayjs": "^1.11.19",
-    "dexie": "^4.2.1",
-    "dexie-react-hooks": "^4.2.0",
     "react": "^19.2.3",
     "react-dom": "^19.2.3",
     "react-markdown": "^6.0.3",
     "react-router-dom": "^6.30.2",
     "remark-gfm": "^1.0.0",
-    "rrweb": "^2.0.0-alpha.4",
-    "rrweb-player": "^1.0.0-alpha.4",
     "web-vitals": "^2.1.4"
   },
   "devDependencies": {