feat: Add opt-out setting for anonymous usage reporting (#743)

* refactor: align VS Code update checks with web runtime parity

- VS Code now uses file-based installId (shared with web server)
- Accepts platform/arch from webview for consistent behavior
- Usage data collection now matches web implementation

* feat: Add opt-out setting for anonymous usage reporting in Appearance

- Add privacy control in Appearance settings to opt-out of anonymous usage reports
- Usage data includes only app version, platform, and runtime - no personal data or code collected
- Setting persists across all runtimes and controls the reportUsage parameter in update checks

packages/ui/src/stores/useUpdateStore.ts

@@ -1,6 +1,7 @@
 import { create } from 'zustand';
 import type { UpdateInfo, UpdateProgress } from '@/lib/desktop';
 import { getDeviceInfo } from '@/lib/device';
+import { useUIStore } from './useUIStore';
 import {
   checkForDesktopUpdates,
   downloadDesktopUpdate,
@@ -66,7 +67,10 @@ function detectPlatform(): 'macos' | 'windows' | 'linux' | 'web' {
 }
 
 function mapRuntimeParams(runtime: ClientRuntime): URLSearchParams {
-  const params = new URLSearchParams({ reportUsage: 'true' });
+  // Check if user has opted out of usage reporting (default: true/enabled from UI store)
+  const shouldReportUsage = useUIStore.getState().reportUsage;
+  
+  const params = new URLSearchParams({ reportUsage: shouldReportUsage ? 'true' : 'false' });
   params.set('deviceClass', detectDeviceClass());
   params.set('arch', detectArch());
   params.set('platform', detectPlatform());