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/win32/ocr.ts

@@ -3,6 +3,8 @@
  * Captures a screen region or window, then runs WinRT OCR to extract text.
  */
 
+import { ps as runPs } from './shared.js'
+
 export interface OcrLine {
   text: string
   bounds: { x: number; y: number; w: number; h: number }
@@ -18,15 +20,6 @@ function emptyResult(language: string): OcrResult {
   return { text: '', lines: [], language }
 }
 
-function runPs(script: string): string {
-  const result = Bun.spawnSync({
-    cmd: ['powershell', '-NoProfile', '-NonInteractive', '-Command', script],
-    stdout: 'pipe',
-    stderr: 'pipe',
-  })
-  return new TextDecoder().decode(result.stdout).trim()
-}
-
 /**
  * PowerShell script that:
  * 1. Screenshots a screen region using CopyFromScreen