fix(app-bundle): the overlay's rail-gate markers still match the deleted amico-run bin — post-sunset amicode shell rows may not classify #1673

Problem

Found by the #1667 implementation (the amico-run bin deletion, PR #1672): the engine overlay's UI classification surfaces still key on the deleted bin's name —

• packages/app-bundle/overlay/packages/ui/src/amicode/rail-gate.ts:19 — SHELL_MARKERS contains "amico-run" (while its sibling markers "amico plan" / "amico spec" never matched amico run rows either);
• packages/app-bundle/overlay/packages/ui/src/amicode/brain-ref.ts:61 — regex /amico-run|julia/.

After the sunset, a shell row running amico run … may not be classified as amicode work by the UI rail gate — silently dropping the daily-driver path from the UI's own recognition, the exact "silent downgrade" class the campaign exists to prevent. The implementer correctly left overlay edits out of the bin-deletion slice: overlay changes require the manifest-hash refresh + materialize-path testing, a different verification discipline than the package suites.

Approach

Update the markers to the post-sunset vocabulary (amico run, alongside amico plan/amico spec/amico catalog/amico vault — enumerate what the rail gate intends to classify), refresh the overlay manifest hash per the overlay doctrine, and pin it with a test: a synthetic shell row running amico run … classifies as amicode work, and the deleted amico-run token alone no longer matches anything (the retirement is complete on both sides).

Acceptance criteria

• Rail-gate markers classify amico run (and the intended sibling verbs) as amicode work; a test pins it.
• The stale amico-run marker entries removed; nothing else in the marker set weakened.
• Overlay manifest-hash refreshed + the materialize path verified per the overlay doctrine (the vendored-engine build gate green).

Prior art

• PR feat: the amico-run sunset begins — the A1′ campaign's first frontier (#852) #1672 (the deletion) + cast D's notes (the finding's origin).
• The overlay doctrine: manifest-hash refresh required for any overlay edit (ADR-0011-era ruling).