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.

src/game/game_manager.gd

@@ -9,6 +9,7 @@ const AccessArtifact := preload("res://src/core/access_artifact.gd")
 const AccessLoadout := preload("res://src/core/access_loadout.gd")
 const AccessVerifier := preload("res://src/core/access_verifier.gd")
 const DoorState := preload("res://src/core/door_state.gd")
+const CrowdSystem := preload("res://src/core/crowd_system.gd")
 const WandScreener := preload("res://src/core/wand_screener.gd")
 const RadioSystem := preload("res://src/core/radio_system.gd")
 const ScenarioFactory := preload("res://src/content/scenario_factory.gd")
@@ -134,6 +135,7 @@ func _ready() -> void:
 	coordinator.npc_spawn_requested.connect(_spawn_npc)
 	coordinator.shift_ended.connect(_on_shift_ended)
 	coordinator.radio.responder_arrived.connect(_on_responder_arrived)
+	_connect_crowd()
 
 	_build_ui()
 	_last_phase = -1
@@ -160,10 +162,13 @@ func _build_guard() -> GuardController:
 	flashlight.name = "Flashlight"
 	flashlight.visible = false
 	flashlight.position = Vector3(0, -0.15, -0.4)
-	flashlight.rotation_degrees = Vector3(-10, 0, 0)
-	flashlight.spot_range = 18.0
-	flashlight.spot_angle = 28.0
-	flashlight.light_energy = 2.5
+	# Aim straight ahead: tilting it down made the cone hit the ground right in
+	# front of the guard instead of the person or door being checked.
+	flashlight.rotation_degrees = Vector3.ZERO
+	flashlight.spot_range = 22.0
+	flashlight.spot_angle = 30.0
+	flashlight.light_energy = 4.0
+	flashlight.spot_attenuation = 0.6
 	head.add_child(flashlight)
 	var collider := CollisionShape3D.new()
 	var shape := CapsuleShape3D.new()
@@ -217,6 +222,7 @@ func _reset_shift_state() -> void:
 		hud.set_body_camera(false)
 	scenario_duration_s = selected_scenario.shift_duration_s
 	coordinator.setup(selected_scenario, scenario_duration_s, 4242)
+	_connect_crowd()
 	_last_phase = -1
 	_apply_phase_lighting()
 
@@ -481,6 +487,51 @@ func _on_responder_arrived(call: Dictionary) -> void:
 	})
 	coordinator.crowd.apply_event("emergency_responder" if call.get("type", "") == "emergency" else "calm_professionalism")
 
+## Crowd presentation (PLAN: Public Crowd Reaction). The crowd system is a
+## mood/attention float; this turns its events into avatar behavior.
+func _connect_crowd() -> void:
+	# CrowdSystem routes its updates through the EventBus (`event_bus.crowd_changed`);
+	# its own `changed` signal is not emitted by apply_event().
+	if coordinator == null or coordinator.event_bus == null:
+		return
+	if not coordinator.event_bus.crowd_changed.is_connected(_on_crowd_changed):
+		coordinator.event_bus.crowd_changed.connect(_on_crowd_changed)
+
+func _on_crowd_changed(payload: Dictionary) -> void:
+	var event_type := str(payload.get("event", ""))
+	var panic := bool(payload.get("panic", false))
+	# Panic wins: people clear away from the entrance.
+	if panic or event_type == "crowd_panic":
+		_flee_crowd()
+		return
+	if CrowdSystem.reaction_for_event(event_type) == "watch":
+		_rubberneck_crowd()
+
+func _incident_point() -> Vector3:
+	if targeted_npc is Node3D and is_instance_valid(targeted_npc):
+		return (targeted_npc as Node3D).global_position
+	if guard:
+		return guard.global_position
+	return Vector3(0, 0, 1.2)
+
+## Idle bystanders stop and face the incident instead of walking on.
+func _rubberneck_crowd() -> void:
+	var point := _incident_point()
+	for npc in npcs:
+		if not is_instance_valid(npc) or not npc.has_method("start_rubberneck"):
+			continue
+		if npc == targeted_npc:
+			continue
+		npc.start_rubberneck(point)
+
+## Panic: everyone nearby moves away from the door.
+func _flee_crowd() -> void:
+	var door_pos: Vector3 = selected_scenario._location_or_default("entrance", Vector3(0, 0.5, 1.2))
+	for npc in npcs:
+		if not is_instance_valid(npc) or not npc.has_method("start_flee"):
+			continue
+		npc.start_flee(door_pos)
+
 func _responder_profile() -> NpcProfile:
 	var p := NpcProfile.new()
 	p.id = "responder"