refactor(app): simplify session directory with direct snapshots and add sessionReady state

Replace subscription-based session accessor pattern with direct snapshot updates in daemon connections context. Add sessionReady flag to connection state to track when initial agent list has been received. Auto-select first ready host in create agent modal. Migrate from app.json to app.config.js. Add android:release script and Playwright testing docs.

packages/app/src/hooks/use-session-directory.ts

@@ -1,35 +1,20 @@
-import { useEffect, useMemo, useState } from "react";
+import { useMemo } from "react";
 import { useDaemonConnections } from "@/contexts/daemon-connections-context";
 import type { SessionContextValue } from "@/contexts/session-context";
 
-export function useSessionDirectory(): Map<string, SessionContextValue | null> {
-  const { sessionAccessors, subscribeToSessionDirectory } = useDaemonConnections();
-  const [revision, setRevision] = useState(0);
-
-  useEffect(() => {
-    return subscribeToSessionDirectory(() => {
-      setRevision((current) => current + 1);
-    });
-  }, [subscribeToSessionDirectory]);
+export function useSessionDirectory(): Map<string, SessionContextValue> {
+  const { sessionSnapshots } = useDaemonConnections();
 
   return useMemo(() => {
-    const entries = new Map<string, SessionContextValue | null>();
-    sessionAccessors.forEach((entry, serverId) => {
-      try {
-        entries.set(serverId, entry.getSnapshot());
-      } catch (error) {
-        console.error(`[useSessionDirectory] Failed to read session accessor for "${serverId}"`, error);
-        entries.set(serverId, null);
-      }
+    const entries = new Map<string, SessionContextValue>();
+    sessionSnapshots.forEach((snapshot, serverId) => {
+      entries.set(serverId, snapshot);
     });
     return entries;
-  }, [sessionAccessors, revision]);
+  }, [sessionSnapshots]);
 }
 
 export function useSessionForServer(serverId: string | null): SessionContextValue | null {
-  const directory = useSessionDirectory();
-  if (!serverId) {
-    return null;
-  }
-  return directory.get(serverId) ?? null;
+  const { sessionSnapshots } = useDaemonConnections();
+  return serverId ? sessionSnapshots.get(serverId) ?? null : null;
 }