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/web/server/index.js

@@ -2448,6 +2448,11 @@ const sanitizeSettingsUpdate = (payload) => {
     }
   }
 
+  // Usage reporting opt-out (default: true/enabled)
+  if (typeof candidate.reportUsage === 'boolean') {
+    result.reportUsage = candidate.reportUsage;
+  }
+
   return result;
 };