fix(telemetry): report real VS Code platform and honor usage opt-out

The VS Code bridge re-mapped the already-mapped platform value from the
webview, collapsing every install to platform "web"; it also sent the
installId even when usage reporting was disabled. The remote-instance
update poll in the header and the post-update wait poll now send
reportUsage=false so status checks no longer count as activity.

packages/vscode/src/bridge-system-runtime.ts

@@ -77,10 +77,13 @@ const getOrCreateInstallId = (scope: string): string => {
   return installId;
 };
 
-const mapNodePlatformToApiPlatform = (value: string): 'macos' | 'windows' | 'linux' | 'web' => {
+const mapNodePlatformToApiPlatform = (value: string): 'macos' | 'windows' | 'linux' | 'android' | 'ios' | 'web' => {
+  // The webview already sends API-shaped values; Node's os.platform() is the fallback source.
+  if (value === 'macos' || value === 'windows' || value === 'linux' || value === 'android' || value === 'ios' || value === 'web') {
+    return value;
+  }
   if (value === 'darwin') return 'macos';
   if (value === 'win32') return 'windows';
-  if (value === 'linux') return 'linux';
   return 'web';
 };
 
@@ -315,7 +318,6 @@ export async function handleSystemBridgeMessage(
           : os.arch();
         const reportUsage = body.reportUsage !== false;
 
-        const installId = getOrCreateInstallId('vscode');
         const requestBody = {
           appType: 'vscode',
           deviceClass,
@@ -323,7 +325,7 @@ export async function handleSystemBridgeMessage(
           arch: mapNodeArchToApiArch(archRaw),
           channel: 'stable',
           currentVersion,
-          installId,
+          ...(reportUsage ? { installId: getOrCreateInstallId('vscode') } : {}),
           instanceMode,
           reportUsage,
         };