perf(app): reduce startup websocket work

Make provider catalogs compact and content-addressed so repeat launches can reuse the persisted snapshot instead of transferring it again. Remove eager global catalog loading and the stopped-agent defensive tail fetch, while keeping sequence-gap and reconnect recovery as the correctness paths. Add an opt-in production-ID Android profiling build for local startup traces.

packages/app/src/contexts/session-context.tsx

@@ -10,7 +10,6 @@ import {
   createSetAgentInitializing,
   refreshAgentInitializationTimeout,
 } from "@/hooks/use-agent-initialization";
-import { prefetchProvidersSnapshot } from "@/hooks/use-providers-snapshot";
 import { generateMessageId, type StreamItem } from "@/types/stream";
 import {
   createSessionAgentStreamReducerQueue,
@@ -494,19 +493,6 @@ function SessionProviderInternal({ children, serverId, client }: SessionProvider
     });
   }, [client, serverId, updateSessionServerInfo]);
 
-  useEffect(() => {
-    if (!isConnected) {
-      return;
-    }
-
-    const serverInfo = client.getLastServerInfoMessage();
-    if (!serverInfo?.features?.providersSnapshot) {
-      return;
-    }
-
-    prefetchProvidersSnapshot(serverId, client);
-  }, [client, isConnected, serverId]);
-
   useEffect(() => {
     const unregister = voiceRuntime?.registerSession({
       serverId,
@@ -739,19 +725,6 @@ function SessionProviderInternal({ children, serverId, client }: SessionProvider
     viewedTimelineSyncRef.current?.setConnected(isConnected);
   }, [isConnected]);
 
-  useEffect(
-    () =>
-      getHostRuntimeStore().subscribeAgentStoppedRunning(serverId, (agentId) => {
-        const session = useSessionStore.getState().sessions[serverId];
-        const timeline = selectAgentTimelineState(session, agentId);
-        if (timeline.status === "synced" && timeline.newer === "available") {
-          return;
-        }
-        viewedTimelineSyncRef.current?.reconcileAgent(agentId);
-      }),
-    [serverId],
-  );
-
   // Daemon message handlers - directly update Zustand store
   useEffect(() => {
     const agentStreamReducerQueue = createSessionAgentStreamReducerQueue({