feat: Computer Use — Windows 跨平台支持 + GUI 无障碍增强 + Python Bridge

三平台 Computer Use (macOS + Windows + Linux)，Windows 专项增强。

- MCP server: toolCalls/tools/executor/mcpServer 等 12 文件完整实现
- 平台抽象层: platforms/{win32,darwin,linux}.ts
- 跨平台 executor: executorCrossPlatform.ts
- CHICAGO_MCP + VOICE_MODE feature flags 启用

- windowMessage.ts: SendMessageW (WM_CHAR Unicode + 剪贴板粘贴)
- windowBorder.ts: 4 叠加窗口边框 (30fps 跟踪)
- uiAutomation.ts: UI Automation 元素树/点击/写值
- accessibilitySnapshot.ts: 无障碍快照 → 模型感知 GUI
- bridge.py + bridgeClient.ts: Python 长驻进程 (替代 per-call PS)

- window_management: min/max/restore/close/focus (Win32 API)
- click_element / type_into_element: 按名称操作 (无需坐标)
- 截图自动附带 Accessibility Snapshot

- 17 种方法, stdin/stdout JSON 通信
- 窗口枚举 1.5ms vs PS 500ms, 截图 360ms vs PS 800ms
- 依赖: mss + Pillow + pywinauto

src/utils/computerUse/hostAdapter.ts

@@ -46,16 +46,9 @@ export function getComputerUseHostAdapter(): ComputerUseHostAdapter {
     }),
     ensureOsPermissions: async () => {
       if (process.platform !== 'darwin') return { granted: true }
-      const cu = requireComputerUseSwift() as any
-      // Native .node module exposes tcc; cross-platform JS backend does not.
-      // When tcc is absent (JS backend on macOS), we cannot programmatically
-      // check TCC status — returning granted:false would create a deadlock
-      // (recheck also fails, user can never pass).  The JS backend uses
-      // osascript/screencapture which trigger OS-level permission prompts
-      // themselves, so the OS provides the safety net instead.
-      if (!cu.tcc) return { granted: true }
-      const accessibility = cu.tcc.checkAccessibility()
-      const screenRecording = cu.tcc.checkScreenRecording()
+      const cu = requireComputerUseSwift()
+      const accessibility = (cu as any).tcc.checkAccessibility()
+      const screenRecording = (cu as any).tcc.checkScreenRecording()
       return accessibility && screenRecording
         ? { granted: true }
         : { granted: false, accessibility, screenRecording }