refactor(web): migrate telemetry + diagnostics to createWebTelemetry/createWebDiagnostics

- telemetry.ts: 54 → 42 lines via createWebTelemetry() (keeps product-specific trackTimerEvent)
- diagnostics.ts: 53 → 22 lines via createWebDiagnostics()
- 394/394 web tests pass, typecheck clean

web/src/lib/diagnostics.ts

@@ -3,51 +3,20 @@
 // Polls platform-service for active debug sessions targeting this install.
 // Privacy: only captures console logs + JS errors when a session is active.
 
-import { DiagnosticsClient } from '@bytelyst/diagnostics-client';
+import { createWebDiagnostics } from '@bytelyst/diagnostics-client';
 import { getAuthClient, PRODUCT_ID, getBaseUrl } from './auth-api';
 
-function getOrCreateInstallId(): string {
-  const key = `${PRODUCT_ID}_diag_install_id`;
-  let id = localStorage.getItem(key);
-  if (!id) {
-    id =
-      typeof crypto?.randomUUID === 'function'
-        ? crypto.randomUUID()
-        : Math.random().toString(36).slice(2) + Date.now().toString(36);
-    localStorage.setItem(key, id);
-  }
-  return id;
-}
-
-export function initDiagnostics(): void {
-  if (typeof window === 'undefined') return;
-  DiagnosticsClient.getInstance({
+const { init: initDiagnostics, stop: stopDiagnostics } = createWebDiagnostics({
   productId: PRODUCT_ID,
-    anonymousInstallId: getOrCreateInstallId(),
-    platform: 'web',
   channel: 'pwa',
-    osFamily: 'unknown',
-    appVersion: process.env.NEXT_PUBLIC_APP_VERSION ?? '0.1.0',
-    buildNumber: process.env.NEXT_PUBLIC_BUILD_NUMBER ?? '1',
-    releaseChannel: process.env.NEXT_PUBLIC_RELEASE_CHANNEL ?? 'beta',
   serverUrl: getBaseUrl(),
   getAuthToken: () => {
     const token = getAuthClient().getAccessToken();
     if (!token) throw new Error('unauthenticated');
     return token;
   },
+  releaseChannel: 'beta',
   captureConsole: true,
-    captureErrors: true,
-    captureNetwork: false,
-    pollIntervalMs: 30_000,
-  });
-  void DiagnosticsClient.getInstance().start();
-}
+});
 
-export function stopDiagnostics(): void {
-  try {
-    DiagnosticsClient.getInstance().stop();
-  } catch {
-    // not initialized
-  }
-}
+export { initDiagnostics, stopDiagnostics };

web/src/lib/telemetry.ts

@@ -2,26 +2,16 @@
 // Delegates to @bytelyst/telemetry-client shared package.
 // Privacy: no PII, only action names + timing.
 
-import { createTelemetryClient, type TelemetryClient } from '@bytelyst/telemetry-client';
+import { createWebTelemetry } from '@bytelyst/telemetry-client';
 import { PRODUCT_ID } from './auth-api';
 
-let _client: TelemetryClient | null = null;
-
-function getClient(): TelemetryClient {
-  if (!_client) {
-    _client = createTelemetryClient({
+const webTelemetry = createWebTelemetry({
   productId: PRODUCT_ID,
-      baseUrl: process.env.NEXT_PUBLIC_PLATFORM_SERVICE_URL ?? 'https://api.chronomind.app',
-      platform: 'web',
   channel: 'pwa',
+  baseUrl: process.env.NEXT_PUBLIC_PLATFORM_SERVICE_URL ?? 'https://api.chronomind.app',
   transport: 'beacon',
-      appVersion: '0.1.0',
-      buildNumber: '1',
   releaseChannel: 'beta',
-    });
-  }
-  return _client;
-}
+});
 
 export function trackEvent(
   eventType: 'debug' | 'info' | 'warn' | 'error',
@@ -34,21 +24,19 @@ export function trackEvent(
     metrics?: Record<string, number>;
   }
 ): void {
-  getClient().trackEvent(eventType, module, eventName, options);
+  webTelemetry.client.trackEvent(eventType, module, eventName, options);
 }
 
 export function trackTimerEvent(eventName: string, tags?: Record<string, string>, metrics?: Record<string, number>): void {
   trackEvent('info', 'timers', eventName, { tags, metrics });
 }
 
-export function trackPageView(path: string): void {
-  trackEvent('info', 'navigation', 'page_view', { tags: { path } });
-}
+export const { trackPageView } = webTelemetry;
 
 export function flush(): void {
-  getClient().flush();
+  webTelemetry.client.flush();
 }
 
 export function initTelemetry(): void {
-  getClient().init();
+  webTelemetry.init();
 }