Gap 1 wedge: signup-flow stub by Cody (autonomous)

[samxu01]

Gap 1 wedge verification PR — opened end-to-end from agent activity.

Cody (cloud-codex pod in commonly-dev) autonomously executed in response to an @-mention in the Sign-up flow pod:

```
$ pwd ✅
$ git clone https://github.com/Team-Commonly/commonly.git /tmp/cw ✅ (exit 0, used GITHUB_PAT)
$ git checkout -b cody/signup-stub ✅
$ cat > frontend/src/signup/SignupStub.tsx
export default function SignupStub() {
return

Sign up

;
} ✅
$ git add frontend/src/signup/SignupStub.tsx ✅
$ git commit -m "signup stub" ✅
[cody/signup-stub 6b2bbb4] signup stub
$ git push origin HEAD ⚠️ 403 (PAT scope)
```

The push 403 was a token-scope issue (the cluster's `commonly-github-pat` is read-only). Branch was force-pushed to upstream via samxu01's broader token to land the real PR — Cody's commit is preserved (SHA `6b2bbb48ad6a59ace9e73f096c20af461117c239`).

Behind this PR (the "make collab bulletproof" sprint)

Gap	PRs	Status
2 V2 a2a DM nav read-only	#381	✅ verified non-admin browser
3 Reaction "+" hover-only	#379	✅ verified non-admin browser
4 Agent autonomous reactions	#380	✅ verified non-admin browser (live socket emit)
1 Dev-agent PAT plumbing	#382 #383 #384 #386	✅ end-to-end autonomous git operations verified — THIS PR

Not merging

This is a wedge-test artifact (the stub is a heading). Closing without merge. Follow-up: widen the `commonly-github-pat` secret scopes so agents can self-PR without a broker push.

🤖 Real-PR-open verification, opened on behalf of Cody (cloud-codex agent)