perf: optimize app startup and background lifecycles

src/lib/host-api.ts

@@ -28,6 +28,23 @@ export async function ensureHostApiToken(): Promise<string> {
   return token;
 }
 
+export type DesktopActivityModule = 'programming' | 'painting' | 'learning' | 'robot' | 'other';
+
+export function reportDesktopActivity(input: {
+  visible: boolean;
+  module: DesktopActivityModule | null;
+}): Promise<unknown> {
+  return invokeIpc('lifecycle:activity', input);
+}
+
+export function setDesktopBackgroundLease(input: {
+  id: string;
+  kind: string;
+  active: boolean;
+}): Promise<unknown> {
+  return invokeIpc('lifecycle:lease', input);
+}
+
 async function getHostApiBaseUrl(): Promise<string> {
   if (hostApiBaseResolved) return cachedHostApiBase;
   try {
@@ -63,6 +80,7 @@ type HostApiProxyData = {
   ok?: boolean;
   json?: unknown;
   text?: string;
+  transport?: 'dispatcher' | 'loopback';
 };
 
 function headersToRecord(headers?: HeadersInit): Record<string, string> {
@@ -72,6 +90,20 @@ function headersToRecord(headers?: HeadersInit): Record<string, string> {
   return { ...headers };
 }
 
+function telemetryRoute(path: string): string {
+  const pathname = path.split('?', 1)[0] || '/';
+  return pathname
+    .split('/')
+    .map((segment, index) => {
+      if (!segment) return '';
+      // Keep diagnostics aggregate-only: IDs, slugs and arbitrary path
+      // segments must never become local telemetry or console output.
+      if (index <= 2 && /^[a-z0-9._-]{1,32}$/i.test(segment)) return segment;
+      return ':id';
+    })
+    .join('/') || '/';
+}
+
 async function parseResponse<T>(response: Response): Promise<T> {
   if (!response.ok) {
     let message = `${response.status} ${response.statusText}`;
@@ -133,9 +165,9 @@ function parseUnifiedProxyResponse<T>(
   }
 
   trackUiEvent('hostapi.fetch', {
-    path,
+    route: telemetryRoute(path),
     method,
-    source: 'ipc-proxy',
+    source: data.transport === 'dispatcher' ? 'ipc-dispatcher' : 'ipc-proxy',
     durationMs: Date.now() - startedAt,
     status: data.status ?? 200,
   });
@@ -165,7 +197,7 @@ function parseLegacyProxyResponse<T>(
   }
 
   trackUiEvent('hostapi.fetch', {
-    path,
+    route: telemetryRoute(path),
     method,
     source: 'ipc-proxy-legacy',
     durationMs: Date.now() - startedAt,
@@ -215,7 +247,7 @@ export async function hostApiFetch<T>(path: string, init?: RequestInit): Promise
     const normalized = normalizeAppError(error, { source: 'ipc-proxy', path, method });
     const message = normalized.message;
     trackUiEvent('hostapi.fetch_error', {
-      path,
+      route: telemetryRoute(path),
       method,
       source: 'ipc-proxy',
       durationMs: Date.now() - startedAt,
@@ -227,7 +259,7 @@ export async function hostApiFetch<T>(path: string, init?: RequestInit): Promise
     }
     if (!allowLocalhostFallback()) {
       trackUiEvent('hostapi.fetch_error', {
-        path,
+        route: telemetryRoute(path),
         method,
         source: 'ipc-proxy',
         durationMs: Date.now() - startedAt,
@@ -252,7 +284,7 @@ export async function hostApiFetch<T>(path: string, init?: RequestInit): Promise
     },
   });
   trackUiEvent('hostapi.fetch', {
-    path,
+    route: telemetryRoute(path),
     method,
     source: 'browser-fallback',
     durationMs: Date.now() - startedAt,