fix(tui): report the not-found guidance when project invoke opens outside a project

[notgitika]

Opening the TUI outside a project and choosing project invoke spun on Resolving project… forever. the picker checked its loading branch before its error branch, so the failed project resolution never rendered.

It now goes through ProjectGate like project build and project deploy, printing the same message the commands do:

✗ No AgentCore project found at <cwd> or any parent directory (looked for agentcore/agentcore.json). Run 'agentcore project create' to scaffold one.

Regression test added; it times out on the old code.

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)

[agentcore-devx-automation]

AgentCore Harness Review

Verdict: Looks good

Nice focused refactor. ProjectInvokePickerScreen now shares the same ProjectGate/LoadingFrame behavior as the other project screens (build, deploy), which replaces the previous "spin forever / print raw error" fallback with the CLI's own projectNotFoundMessage guidance and adds a retry key on transient failures.

A few things I checked and think are fine:

• Splitting the screen into a gate wrapper + ProjectInvokePicker child cleanly removes the project?. guards; the child now correctly assumes a resolved Project and preserves the existing esc-when-loading/erroring logic (screen.tsx L117-119).
• The new not-found test uses a real mkdtemp + process.chdir rather than mocking process.cwd/fs, which matches the existing pattern used in buildDeploy.screen.test.tsx and status/index.test.ts. The afterEach restores the original cwd and cleans up all pushed dirs.
• flatFrame / waitForFlatText are already exported from src/testing, and the assertions on the flattened frame (message + cwd + agentcore project create) exercise exactly what the new gate path renders.
• No new user-facing feature/command surface, so I don't think additional telemetry is needed here — the underlying projectManager.resolve path is already instrumented at the handler level.

Nothing blocking from me.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.09%. Comparing base (831025c) to head (5be0da3).
⚠️ Report is 2 commits behind head on refactor.

Additional details and impacted files

@@            Coverage Diff            @@
##           refactor    #2205   +/-   ##
=========================================
  Coverage     97.09%   97.09%           
=========================================
  Files           544      544           
  Lines         37834    37848   +14     
=========================================
+ Hits          36736    36750   +14     
  Misses         1098     1098           

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