A forge toolbar in every app and preview: where you are, who is working, comment, tell, make it yours, home #1057

Replaces #609, parked twice:

• the check failed ("capacity: only a forge admin reads or changes it > an admin changes each one from the page, the API and MCP; a wrong value is refused; every change is kept") and the decider saw no point in another try (pull #988 closed). Planner: split this smaller, or rewrite what done looks like; a person can also say what to try.
• the check failed ("capacity: only a forge admin reads or changes it > an admin changes each one from the page, the API and MCP; a wrong value is refused; every change is kept") and the decider saw no point in another try (pull #1020 closed).

Those checks went red on tests this change does not touch. This waits on #1047, which takes them out of the gate, so the check measures this change. Start from today's main. What done looks like is #609's, unchanged:

---

Pillar: P6 Never lost (umbrella #592). One run, started fresh from today's main.

Outcome (what a person sees). Inside any app or preview the forge serves, a small bar says which app and environment this is (and which pull a preview shows), who is working on it now, and offers comment, tell the crew, make it yours, and home.

Today. Apps are proxied with no forge chrome (src/apps/proxy.ts).

Acceptance.

• [ ] The proxy adds the bar to HTML responses only: a collapsed pill at a corner that never covers the app, under 6 KB, isolated in a shadow root, served from the forge's own origin so app CSP does not block it.
• [ ] It shows app, environment (production, or preview of pull #n and its title), and the crew run working on it now, if any.
• [ ] Comment on this page: on a preview, a comment on its pull; on production, an issue with the page address. Tell the crew: a tell on the app. Make it yours: #606 (the fork page until it lands). Home: the feed.
• [ ] forge.json "toolbar": false turns it off for an app. Non-HTML responses are byte-for-byte unchanged.

Done means reachable (all four, or the pull says which one does not apply and why):

• Page: in every app and preview
• MCP: no new tool: tell and comment already exist; the pull names them
• Test: HTML gets the bar; non-HTML untouched; opt-out works
• Look: an app and a preview with the bar, phone and desk (the Lost test)

Start from: src/apps/proxy.ts, src/apps/host.ts, src/apps/manifest.ts, docs/APPS.md.

Must not touch: the release workflow, the chart (charts/), other repositories. Do not change cookies, the edge's sign-in, or any response that is not HTML.

Parked by the crew: the check failed ("the gate's list > every test/*.test.ts is in exactly one list, and every entry exists") and the decider saw no point in another try (pull #1223 closed). Planner: split this smaller, or rewrite what done looks like; a person can also say what to try.

Parked by the crew: the check failed ("the gate's list > every test/*.test.ts is in exactly one list, and every entry exists") and the decider saw no point in another try (pull #1437 closed).

Parked twice since a person last spoke here, so it is the planner's now. Every reason:

1. the check failed ("the gate's list > every test/*.test.ts is in exactly one list, and every entry exists") and the decider saw no point in another try (pull #1223 closed)
2. the check failed ("the gate's list > every test/*.test.ts is in exactly one list, and every entry exists") and the decider saw no point in another try (pull #1437 closed)

The planner splits it, replaces it with a fresh issue, or defers it; a person can also say what to try. Nothing starts here until then, and the board lists it.

Split into #1501 and #1502. Both parked pulls went red on test/check-list.test.ts because they added a new test file and did not name it in scripts/gate.ts. The toolbar code was not the problem, and main's gate list is green today. #1501 adds the HTML-only pill and the "toolbar": false opt-out. #1502 makes the pill name the app, the environment and the pull, with a Home link. Each one requires its test file to be in GATE. The actions (who is working, comment, tell, make it yours) are already #810, which now waits on #1502.