Add crowd presentation, fix NPC navigation, refresh screenshots

NPC navigation (previously dead in the live game)
- Only assign NavigationAgent3D.target_position when it changes: re-assigning every
  frame invalidated the path, so get_next_path_position() kept returning the current
  point and avatars never moved.
- Follow the first path point that is closer to the destination than the avatars are.
  Nav points sit on the navmesh plane (y=0) while bodies stand at y~0.5, so the old
  3D distance test always looked "already there"; path[0] is also the old start point,
  so a naive "far enough away" pick steered backwards and oscillated.
- Fix fsm.state -> fsm.current_state in the idle-lifetime check.

Crowd presentation
- Aggressive behavior, visible weapons, and responder arrivals make idle bystanders
  stop and face the incident for 12 s; someone waiting at the entrance keeps focus.
- Panic (mood >= 0.75) walks people away from the door at 2.4 m/s, then they despawn.
- Wire reactions to EventBus.crowd_changed: CrowdSystem.apply_event() emits on the bus,
  not on its own `changed` signal (the first wiring received nothing).
- Measured a 16-NPC entrance at ~1.2 ms/frame (824 fps, vsync off), so no LOD/culling.

World and HUD
- Skyline is now a ring of four alpha-scissored planes at 200 m instead of a single
  plane; PlaneMesh defaults to horizontal, which is why the backdrop rendered as a band
  overhead. Larger ground plane, mipmapped texture, scissor threshold 0.5 (0.3 left
  mip dashes in the sky), lifted albedo so the city is not pure black.
- Flashlight aims straight ahead and lights the person/door instead of the ground.
- Shorter HUD controls line so it stops overlapping itself.

Tests, tooling, docs
- Headless suite 98 -> 105 (new test_crowd_presentation.gd, 7 tests).
- New smoke_crowd.gd: rubbernecking, panic, and flee-target sanity.
- capture_screenshots.gd starts a shift from the venue menu and stages the night set
  properly; all six README screenshots regenerated.
- README, TODO/DONE (crowd section moved), MEMORY updated. Version 0.2.4.

README.md

@@ -28,8 +28,8 @@ The central design goal is simple:
 
 **All releases:** <https://git.allucanget.biz/zwitschi/security-game/releases>
 
-> **Latest: v0.2.3** — the PLAN verbs (eye contact, recognition as evidence, body camera,
-> blocking that stations the guard, request reason) and working incident recording.
+> **Latest: v0.2.4** — crowd presentation (rubbernecking and panic), the distant skyline ring,
+> working NPC navigation, and a refreshed screenshot gallery.
 > Releases are built automatically when a `vX.Y.Z` tag is pushed
 > (see [`docs/RELEASING.md`](docs/RELEASING.md)); manual builds use
 > `./tools/build_releases.sh`. Installer/AppImage packaging runs in the same pipeline
@@ -211,6 +211,9 @@ godot --headless --path . --script res://src/test/smoke_session_shell.gd
 
 # PLAN-verb smoke: recognize, request reason, body camera, warning, blocking
 godot --headless --path . --script res://src/test/smoke_plan_verbs.gd
+
+# Crowd smoke: rubbernecking on aggression, panic clearing the entrance
+godot --headless --path . --script res://src/test/smoke_crowd.gd
 ```
 
 The unit test runner is the project's own lightweight harness (no editor plugin required) so CI can run it without the editor.
@@ -263,7 +266,7 @@ Implemented so far:
 - Godot 4.3 project scaffold, input map, procedural world builder
 - Venue-driven simulation core: `ShiftCoordinator`, `VenueScenario`, `EventScheduler`, `NPCController` + FSM, `AccessVerifier`, `EscalationManager`, `RadioSystem`, `IncidentRecorder`, `ReputationEvaluator`, `CrowdSystem`
 - Three authored scenarios (Hollywood Boulevard building, The Joke Shop, Late Night TV Studio) with access policies, NPC archetypes, and event pools
-- Headless unit tests: **98 passing** (access rules and venue-correct access loadout, escalation, radio cooldown/battery, NPC reaction determinism, door lock, flashlight perception, persistence round-trip, settings round-trip, navmesh, step colliders, skyline alpha, scenario data, full-shift simulation, wand screening, responder dispatch, localization strings, focus cone, action wheel, session shell, PLAN verbs and incident recording)
+- Headless unit tests: **105 passing** (access rules and venue-correct access loadout, escalation, radio cooldown/battery, NPC reaction determinism, door lock, flashlight perception, persistence round-trip, settings round-trip, navmesh, step colliders, skyline alpha, scenario data, full-shift simulation, wand screening, responder dispatch, localization strings, focus cone, action wheel, session shell, PLAN verbs and incident recording, crowd presentation)
 - Simulation extras: protester archetype, CALL_SOMEONE reaction, door lock/secure mechanic (visual indicator), flashlight with night perception bonus, LATE shift phase reaching the violent-threat event
 - First-person prototype with interaction HUD, access inspection, wand screening, radio report form (incl. emergency hold-to-confirm), dispatched responder avatars, aim-free targeting, venue cycling between all three scenarios, color-coded escalation feedback, procedural audio cues, navigation-mesh NPC paths, JSON-backed localized strings, persisted shift history, debug overlay, and shift review
 - Control pass: focus cone on NPC heads with a billboarded gold ring and name, action wheel (LMB/Space) with de-escalation-first slices, mouse-look freeze while a panel is open, acceleration-based walking, and named input actions (`action_menu`, `confirm`, `cancel`, `inspect`, `wand`)
@@ -272,10 +275,13 @@ Implemented so far:
 - Routine traffic despawns after a while at its waypoint so the crowd cap no longer fills with idle standers
 - PLAN verbs: eye contact (distinct Level 1 cue), recognizing a person as a player decision recorded as access evidence, a body-camera flag that a formal warning arms (and `B` toggles), blocking that physically stations the guard between the person and the door, and a Level 3 request-reason ask answered from the NPC's `dialogue_lines`
 - Incidents are now actually opened on focus and closed at shift end, so player actions, access evidence, escalation levels, and unresolved interactions reach the review (previously every recorded event was dropped)
+- Crowd presentation: aggressive behavior and responder arrivals make idle bystanders stop and face the incident; panic sends people away from the door (and they leave the scene). A busy 16-NPC entrance measured ~1.2 ms/frame, so no LOD/culling was needed at the current cap
+- Distant skyline ring: four alpha-scissored planes at 200 m read as a hazy city on the horizon (the baked backdrop used to show as a black slab), with a larger ground plane so the buildings meet the street
+- Flashlight aims straight ahead and lights the person/door being checked instead of the ground in front of the guard
 - Visual polish pass (v0.2.0): phase-based lighting (sun/sky/ambient per shift phase), street lamps with night-mode bulbs and omni lights, glowing marquee signage, crosswalk, planters and low-poly street trees, NPC height/brightness variety, denser routine traffic — day and late-night screenshot sets
 - Assets pass: authored textures in `assets/textures/` (brick facade, concrete, asphalt, awning, skyline, vignette, HUD icons, access-card art) generated by `tools/generate_textures.py`, soft sun shadows, humanoid NPC rigs with archetype props + procedural walk bob and attention head-turn, inspection artifact cards, escalation vignette, mode icons, and a body-camera overlay (REC + shift clock)
 
-Not yet implemented: body-camera replay timeline, crowd rubbernecking, emergency aftermath, editor-based GUT integration, and crowd performance profiling/LOD (see `TODO.md`).
+Not yet implemented: body-camera replay timeline, emergency aftermath, editor-based GUT integration, and crowd performance profiling/LOD (see `TODO.md`).
 
 ### Smoke Test Checklist
 
@@ -302,9 +308,11 @@ Not yet implemented: body-camera replay timeline, crowd rubbernecking, emergency
 21. `Warn` turns the body camera on (REC overlay appears); `B` toggles it manually.
 22. `Block` moves the guard between the person and the door.
 23. The shift review reports the incident count, including interactions left unresolved.
-24. `Esc` with nothing open pauses the shift; resume / restart / settings / quit-to-menu all work, and settings changes persist across a restart.
-25. NPCs route around the building using the navigation mesh (no stuck-at-wall behavior during a smoke run).
-26. When the shift timer reaches 0, the shift review screen shows grade, incident summary, and persisted shift history; "Run another shift" returns to the venue menu.
+24. Escalating on someone (or a responder arriving) makes idle bystanders stop and face the incident.
+25. Repeated alarms panic the crowd and nearby people clear away from the door instead of standing around.
+26. `Esc` with nothing open pauses the shift; resume / restart / settings / quit-to-menu all work, and settings changes persist across a restart.
+27. NPCs route around the building using the navigation mesh (no stuck-at-wall behavior during a smoke run).
+28. When the shift timer reaches 0, the shift review screen shows grade, incident summary, and persisted shift history; "Run another shift" returns to the venue menu.
 
 ## Development Workflow