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.

src/game/game_manager.gd

@@ -479,8 +479,19 @@ func _spawn_npc(profile: NpcProfile, intent: String, npc_id: String, event: Dict
 	# Authored events stay for the whole shift; routine traffic cycles out.
 	avatar.ephemeral = event.get("kind", "routine") == "routine"
 	avatar.lifetime_s = 45.0 + float((npc_counter * 17) % 60)
+	avatar.get_npc_controller().refuses_screening = bool(event.get("refuses_screening", false))
 	scene_root.add_child(avatar)
 	npcs.append(avatar)
+	# Authored events can point the player at the right verb (PLAN.md verbs).
+	if event.has("hint") and hud:
+		hud.log(Strings.lookup(str(event["hint"])))
+	# Celebrity arrivals draw extra bystanders, not just one avatar.
+	for extra in event.get("extra_spawns", []):
+		var extra_profile := selected_scenario.profile_for(extra.get("npc_type", Rules.NpcType.TOURIST))
+		if extra_profile == null or npcs.size() >= MAX_LIVE_NPCS:
+			continue
+		_spawn_npc(extra_profile, str(extra.get("intent", "photo")),
+			"%s_w%d" % [npc_id, npcs.size()], {"kind": "routine"})
 
 ## Drop references to freed avatars so the cap and Tab cycling stay accurate.
 func _purge_npcs() -> void:
@@ -1238,6 +1249,16 @@ func _toggle_wand_screening() -> void:
 	var controller: Object = _targeted_controller()
 	if controller == null:
 		return
+	if controller.refuses_screening:
+		# Authored event: this guest refuses the screen (Joke Shop content).
+		hud.set_wand_icon(false)
+		hud.log(Strings.fmt("wand.refused", [controller.profile.display_name if controller.profile else "The guest"]))
+		coordinator.recorder.add_event(controller.npc_id, {
+			"type": "wand_refused",
+			"outcome": "refused",
+		})
+		coordinator.reputation.apply("prop", -1.0, "guest refused screening")
+		return
 	var profile: Object = controller.profile
 	var items: Array = profile.carried_items if profile else []
 	var result: Dictionary = wand_screener.screen(items)