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>

entrypoints/content.ts

@@ -1,45 +1,9 @@
 import '../.wxt/types/imports.d.ts';
-import { createRecorder } from '@/utils/useRecorder';
-import { onMessage } from '@/utils/messages';
 
 export default defineContentScript({
-  // matches: ['*://*.google.com/*'],
   matches: ['<all_urls>'],
   runAt: 'document_start',
   main() {
-    const recorder = createRecorder();
-    let isRecording = false;
-
-    onMessage('content:check-status', () => {
-      console.log(`[content]${isRecording}`);
-      return isRecording;
-    });
-
-    onMessage('content:start-recording', async () => {
-      try {
-        const started = await recorder.startRecord();
-        if (started) {
-          isRecording = true;
-          return { ok: true };
-        } else {
-          return { ok: false, error: 'Failed to start recorder' };
-        }
-      } catch (error) {
-        console.error('Error handling start recording:', error);
-        return { ok: false };
-      }
-    });
-
-    onMessage('content:stop-recording', () => {
-      try {
-        console.log('[content] stopRecording received');
-        recorder.stopRecord();
-        isRecording = false;
-        return { ok: true };
-      } catch (error) {
-        console.error('Error handling stop recording:', error);
-        return { ok: false };
-      }
-    });
+    // Content script placeholder
   },
 });