Add one-use consent for a named player to start seat AI

Let a human owner authorize another human in the started room to start a fixed difficulty once within 24 hours. The owner retains the seat, cookie, private hand, recovery setup and takeback control. Consent is explicit even while online; neither host status nor inactivity authorizes a takeover. Activation enters the existing paced private-view AI path without strategic changes.

Add additive migration 0006, both exact session fences, owner/delegate-only metadata in the authenticated room snapshot, atomic CAS activation and consumption, expiry and terminal retry receipts. Replacement hides older consent; own AI changes invalidate unused consent. Recovery or handover of either bound seat invalidates the grant. Future-version guards prevent stale computed state from overwriting a racing action. Exact browser retry records retain the original operation/version across refresh and cannot rearm old consent. Shared HTTP continuation preserves coalescing across ordinary and control routes.

Independent review found no material remaining issue. Revoke messaging accurately handles activation winning the race. Browser QA exercised grant/revoke, preserved consent after refresh, reciprocal fixed-profile activation, consumed receipts, keyboard takeback and private ownership. The panel now remains expanded after success and action buttons are at least 44px. Responsive screenshot acceptance remains open because the browser viewport override targeted a failed secondary-origin tab; desktop controls and no-overflow width were verified. The QA room is stopped at a genuine human setup decision with both seats taken back.

Types, lint, all 4906 offline tests, production build and all 45 HTTP tests pass on the stable source fingerprint. Seven new offline cases cover client consent/retry validation and real SQLite privacy, restart, one-use races, future versions, takeback, expiry and both-seat recovery/handover; two new HTTP cases cover authentication, injection, fixed-profile continuation and takeback. The first broad run exposed 68 legacy VM fixtures missing the new production dependency; their mappings were updated and the real shared continuation remains exercised. The historical 0005 migration test verifies backfill before applying 0006 for current code.

All 1174 original rooms, 2456 seats and every prior recovery/entry/handover/migration row remain unchanged. SQLite integrity and foreign keys pass; migration and QA added 88 rooms and 188 seats. No reset, server restart, usage check or automation was performed.

The current Sites integration has no supported durable Cron/DO provisioning path. Document this platform blocker rather than adding an inert scheduled export; unattended resumption and broader network-failure acceptance remain unfinished. Full rules, component, AI strength and publication gates remain closed.

Verified source tree: 2d86fc611e9ef4f5a10db10f96687a31db1ec238908ecf1e9333c50fac9ccaa8

docs/IMPLEMENTATION_STATUS.md

@@ -1,5 +1,20 @@
 # Dune implementation status
 
+## 20 September 2026 — One-use named-player AI permission
+
+The [AI permission prototype](SEAT_AI_PERMISSION.md) connects optional owner
+consent to a named human and fixed difficulty for one activation within 24 hours.
+It retains ownership and private information, uses both exact session fences,
+atomic versioned activation/consumption, owner takeback invalidation and saved
+exact retries. Additive migration 0006 preserves existing rooms and seats.
+Independent review, focused SQLite/client/HTTP checks, browser acceptance and
+final source-bound check/build/HTTP/preservation evidence belong to the private
+checkpoint and Git message. No AI strategy or mode/publication gate changes.
+
+The [Sites platform audit](AUTOPILOT.md#platform-audit-20-september-2026) found no
+supported durable trigger or alarm binding. Unattended resumption remains a
+platform blocker; no inert scheduler was added or claimed complete.
+
 ## 20 September 2026 — Movement and Traitor introduction exercises
 
 The [introduction](INTERACTIVE_INTRODUCTION.md) now connects seven lessons and