Implement NPC perception, returning trespassers, responder dispatch, wand screening, and accessibility polish

MEMORY.md

@@ -15,7 +15,13 @@ Session memory for durable decisions, state, and gotchas. Keep concise, remove o
 
 ## Current State
 
-- Core simulation, three scenarios, headless tests (25 passing), and a first-person prototype with interaction HUD, access inspection, radio (assist + emergency hold-to-confirm), debug overlay, and shift review are implemented and green.
+- Core simulation, three scenarios, headless tests (41 passing), and a first-person prototype with interaction HUD, access inspection, radio (assist + emergency hold-to-confirm), debug overlay, and shift review are implemented and green.
+- NPC avatars now walk to per-intent waypoints (`VenueScenario.waypoint_for_intent`): enter/trespass/deliver/arrive → entrance, photo/film/perform/wander/roam → sidewalk, sit → steps_end. `NpcAvatar.setup` takes an explicit `door_position`.
+- Returning-trespasser behavior: `NpcProfile.return_probability` (trespasser 0.6, mental-crisis 0.4, others 0). `NPCController._maybe_schedule_return()` moves a directed-away NPC to `LOITERING_DISTANT`; `tick_return(delta)` fires after 20-60s and transitions back to `APPROACH`. `NpcAvatar._advance_fsm` re-targets the door on return.
+- Perception pass: `NPCController.perceive_guard(distance)` returns `{noticed, band, reaction}` with bands `unaware` (>6m), `aware` (2-6m), `near` (<2m). Near + temperament ≥0.6 → ARGUE, else COMPLY. `GameManager._perception_pass()` feeds real guard distance each physics tick and logs first-time notice.
+- Responder dispatch: `RadioSystem` tracks `pending_calls` and decrements `arrival_delay_s` in `tick`; emits `responder_arrived` when a call's delay elapses. `RadioSystem.responder_outcome(call)` maps danger/weapons → command/restraint/evacuation/arrest. `GameManager._on_responder_arrived` spawns a `RESPONDER` avatar at the entrance and logs the outcome. HUD shows an emergency-radio cooldown label via `_update_radio_cooldown`.
+- Wand screening (Joke Shop): `WandScreener` (new `src/core/wand_screener.gd`) classifies carried items as prohibited (`weapon/knife/gun/blade`) vs false-alarm (`keys/belt/phone/coins/watch/buckle`) vs clear. `NpcProfile.carried_items` holds guest items. `GameManager` binds `W` to `_toggle_wand_screening` and `A`/`D` to `decide_wand`; `decide_access` blocks admission at wand venues until `controller.screened` is true. `VenueScenario.door_staff_lines` holds venue-specific door-staff dialogue (Joke Shop has id/ticket/wand/refusal/prohibited lines).
+- Polish/accessibility: tone picker (`T` cycles `selected_tone` via `TONE_ORDER`; HUD `tone_label`), aim-free targeting (`Tab` cycles nearby NPCs within `NEARBY_RADIUS`), color-coded escalation indicator (`Hud.set_escalation`), procedural audio (`AudioFeedback` node generates sine tones for confirm/radio/escalation/deny), and a centralized `Strings` table (`src/core/strings.gd`, `lookup`/`fmt`) for localization. NOTE: `Strings.get` was renamed to `Strings.lookup` because `get` collides with `Object.get`.
 - Run tests: `godot --headless --path . --script res://src/test/test_runner.gd`
 - Boot check: `godot --headless --path . --quit-after 120`
 - Screenshot tool: `godot --path . --script res://src/test/take_screenshot.gd` (writes to `user://screenshot.png`).
@@ -24,7 +30,6 @@ Session memory for durable decisions, state, and gotchas. Keep concise, remove o
 
 - RefCounted reference cycle: `NPCController` holds an `FSM` that holds a back-reference to its owner, so test suites report "resources still in use at exit". Benign (process exit), but worth breaking later (e.g. `WeakRef` or explicit `dispose()`).
 - Headless (dummy renderer) logs "Parameter m is null" from `mesh_get_surface_count`; it does not occur with a real GL driver and does not affect logic.
-- NPC avatars all walk to the entrance and idle; per-intent waypoints are not implemented yet (see TODO).
 - Wand screening (Joke Shop) is policy-only; the interaction is not yet in the prototype (see TODO).
 
 ## Open Questions