Author the missing scenario content from the PLAN lists

Joke Shop
- Reservation list without ID (guest list valid, ID missing) — denied.
- Borrowed/mismatched ID (ID valid but mismatched) — denied.
- Guest who refuses the wand screen: new `refuses_screening` event flag, copied
  onto NPCController, handled in _toggle_wand_screening (logs wand.refused, records
  a wand_refused event, small prop hit, panel stays closed).
- Late arrival during the performance (ID + ticket, "arrive" intent).

Studio
- Filming-boundary event and a later repeat, both using the new `film_boundary`
  intent which maps to `steps_end` so the influencer stands past the posted line.
- Celebrity arrival now pulls in a small crowd via a new `extra_spawns` event field
  (two tourists + an influencer), spawned through the normal path.

Building
- Filming-boundary event whose hint points at the body camera and request-reason
  verbs, plus an unclear-intent event that hints at asking for a reason.

Engine support
- Events may carry `hint` (string key logged on spawn), `extra_spawns`, and
  `refuses_screening`; 9 new localized hint strings.

Tests/docs
- Headless suite 139 -> 149 (test_scenario_content.gd) and a new
  smoke_scenario_content.gd that spawns the refusal and celebrity events through the
  real signal path.
- README, TODO section moved to DONE, MEMORY. Version 0.2.13.

DONE.md

@@ -514,3 +514,15 @@ Completed 2026-10-31 (working tree). Headless **139/139**; verified visually at
 
 - [x] Escalation colors that still read in grayscale (shape or label, not hue alone).
 - [x] HUD font scale in settings.
+
+## Scenario content still missing vs PLAN lists
+
+Completed 2026-10-31 (working tree). Headless **149/149**; `src/test/smoke_scenario_content.gd` spawns the refusal event and the celebrity arrival through the real signal path.
+
+
+- [x] Joke Shop: guest on the reservation list without ID; borrowed/mismatched ID; guest
+      refuses wand screening; late arrival during a performance.
+- [x] Studio: filming-boundary repeat (influencer ignores a posted line); celebrity-arrival
+      crowd spike (more rubberneckers, not only one `arrive` spawn).
+- [x] Building: "activate body camera" and "request reason" once those verbs exist, used in
+      at least one authored event.