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>

utils/messages.tsx

@@ -1,28 +1,8 @@
 import { defineExtensionMessaging } from '@webext-core/messaging';
 
+// eslint-disable-next-line @typescript-eslint/no-empty-object-type
 interface ProtocolMap {
-  // --- Popup 相关 ---
-  'popup:start': () => { ok: boolean; error?: string };
-  'popup:stop': () => { ok: boolean; error?: string };
-  'popup:started': () => void;
-  'popup:stopped': () => void;
-  'popup:tab-changed': (data: { currentTabId: number; recordingTabId: number | undefined }) => void;
-  'popup:check-status': () => { active: boolean; startTime?: number };
-  'popup:ready': () => void;
-  'popup:get-sessions': () => { id: string; startTime: number; tabId: number; chunkCount: number; totalEvents: number }[];
-  'popup:get-session-events': (sessionId: string) => unknown[];
-  'popup:delete-session': (sessionId: string) => { ok: boolean };
-  'popup:download-session': (sessionId: string) => { ok: boolean };
-
-  // --- Content 相关 ---
-  'content:save-track-events': (event: unknown) => boolean;
-  'content:start-recording': () => { ok: boolean; error?: string };
-  'content:stop-recording': () => { ok: boolean };
-  'content:check-status': () => boolean;
-
-  // --- Offscreen 相关 ---
-  'offscreen:start-recording': (streamId: string) => void;
-  'offscreen:stop-recording': () => void;
+  // Placeholder - 扩展消息协议
 }
 
 export const { sendMessage, onMessage } = defineExtensionMessaging<ProtocolMap>();