fix(tui): move app.agents from blocking to non-blocking bootstrap - #27448

Summary

• Move agentsPromise from blockingRequests to non-blocking Promise.all in SyncProvider.bootstrap()
• Adjust response array indices (agents removed from blocking section)

Problem

The TUI shows a blank page indefinitely when the app.agents HTTP request hangs. This happens because:

1. SyncProvider.bootstrap() puts ALL initial HTTP requests into a blockingRequests array
2. The ready getter returns store.status !== "loading", which blocks the entire component tree from rendering until all blocking requests complete
3. app.agents triggers Agent.Service initialization via lazy InstanceState/ScopedCache
4. If Agent.Service init encounters filesystem errors (e.g. ENAMETOOLONG on deeply nested node_modules/.pnpm paths in the project directory), the error is not properly propagated, causing the request to hang forever
5. Result: TUI never renders — user sees a blank screen

Fix

Move agentsPromise from blockingRequests to the non-blocking section (alongside command.list, lsp.status, mcp.status, etc.). The TUI now renders as soon as essential data (providers, config, project) is available, while agents load asynchronously in the background with .catch(() => {}).

The agents data is still populated into the store when the request eventually resolves — the UI just doesn't block on it.

Testing

• Verified TUI renders successfully in ~1.5s with the fix applied
• Agent list populates correctly after initial render
• No regression in normal startup flow

🤖 Generated with Claude Code