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/src/renderer/composables/useDesktopSession.ts

@@ -375,7 +375,7 @@ async function syncRuntimeSessionToMain(next: DesktopSession | null = session.va
 function formatLoginError(err: unknown): string {
   if (err instanceof ApiClientError) {
     const messages: Record<string, string> = {
-      invalid_credentials: "邮箱或密码错误",
+      invalid_credentials: "账号或密码错误",
       login_rate_limited: "登录请求过于频繁",
       login_locked: "登录已被临时保护",
       login_in_progress: "登录请求正在处理中",