feat(desktop-client): suppress native menu bar on Windows/Linux and support phone number login

- Add suppressNativeWindowMenu() to hide native menu bar on all windows (Win/Linux only)
- Set autoHideMenuBar: true on BrowserWindow creation as belt-and-suspenders
- Import Menu from electron/main to support menu suppression
- Login form: rename field from email to identifier, support phone number input
- Migrate saved credential key from geo_rankly_saved_email to geo_rankly_saved_identifier with fallback
- Update login error message: "邮箱或密码错误" → "账号或密码错误"
- Remove unset ELECTRON_RUN_AS_NODE from dev script (not needed on Windows)

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

apps/desktop-client/package.json

@@ -11,7 +11,7 @@
   "type": "module",
   "main": "out/main/bootstrap.cjs",
   "scripts": {
-    "dev": "unset ELECTRON_RUN_AS_NODE && electron-vite dev --inspect=9229",
+    "dev": "electron-vite dev --inspect=9229",
     "build": "electron-vite build",
     "package:mac": "pnpm run build && electron-builder --mac --arm64,universal",
     "package:win": "pnpm run build && electron-builder --win --x64",