Implement TODO backlog: LATE phase fix, protester, CALL_SOMEONE, door lock, flashlight, persistence, navmesh, JSON localization, and release tooling

- Fix LATE shift phase (start 700s) so the violent-threat event is reachable
- Add PROTESTER archetype (rules, profile, colors, events in public venues)
- Add CALL_SOMEONE reaction (FSM -> ARGUING, influencer/trespasser/protester weights)
- Door lock: DoorState core class, L binding, red/green visual indicator,
  locked doors thwart FORCE_ENTRY
- Flashlight: G binding, SpotLight3D, perception radius bonus at evening/late
- Persistence: save shift results via Save autoload, history + best score on
  review screen, round-trip test
- Navigation: flat NavigationRegion3D navmesh, NavigationAgent3D path following
  with direct-movement fallback; steps made visual-only so NPCs reach entrance
- Localization: strings moved to content/strings.en.json (loader keeps
  lookup/fmt signatures; coverage test over all keys)
- Distribution: export_presets.cfg (Linux/Windows/macOS), tools/build_releases.sh,
  docs/RELEASING.md, prominent README Downloads section
- Remove stale signal_bus.gd (invalid static-signal experiment)
- Tests: 53 passing across 9 suites

src/game/game_manager.gd

@@ -7,6 +7,7 @@ const Rules := preload("res://src/core/rules.gd")
 const Strings := preload("res://src/core/strings.gd")
 const AccessArtifact := preload("res://src/core/access_artifact.gd")
 const AccessVerifier := preload("res://src/core/access_verifier.gd")
+const DoorState := preload("res://src/core/door_state.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")
@@ -21,6 +22,9 @@ const Hud := preload("res://src/game/ui/hud.gd")
 const RadioPanel := preload("res://src/game/ui/radio_panel.gd")
 const ShiftReview := preload("res://src/game/ui/shift_review.gd")
 
+var world_builder: WorldBuilder = null
+var door := DoorState.new()
+var flashlight_on := false
 var coordinator: ShiftCoordinator = null
 var guard: GuardController = null
 var hud: Hud = null
@@ -55,7 +59,8 @@ func _ready() -> void:
 	scene_root.name = "SceneRoot"
 	add_child(scene_root)
 
-	WorldBuilder.new(scene_root).build()
+	world_builder = WorldBuilder.new(scene_root)
+	world_builder.build()
 	_ensure_lighting()
 
 	guard = _build_guard()
@@ -86,6 +91,15 @@ func _build_guard() -> GuardController:
 	camera.name = "Camera3D"
 	camera.current = true
 	head.add_child(camera)
+	var flashlight := SpotLight3D.new()
+	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
+	head.add_child(flashlight)
 	var collider := CollisionShape3D.new()
 	var shape := CapsuleShape3D.new()
 	shape.radius = 0.4
@@ -202,7 +216,10 @@ func _responder_profile() -> NpcProfile:
 	return p
 
 func _on_shift_ended(review: Dictionary) -> void:
-	shift_review_panel.show_review(review, selected_scenario)
+	# Persist the finished shift locally (Save autoload, user:// JSON).
+	if Save:
+		Save.save_shift_result(review)
+	shift_review_panel.show_review(review, selected_scenario, Save.load_shift_results() if Save else [])
 
 func _on_guard_target(target: Node3D) -> void:
 	targeted_npc = target
@@ -259,6 +276,10 @@ func _handle_key(keycode: Key) -> void:
 			_cycle_nearby_target()
 		KEY_F:
 			hud.toggle_debug()
+		KEY_G:
+			_toggle_flashlight()
+		KEY_L:
+			_toggle_door_lock()
 		_:
 			_handle_action_key(keycode)
 
@@ -291,6 +312,25 @@ func _handle_action_key(keycode: Key) -> void:
 		_:
 			pass
 
+## Toggle the guard's flashlight. In evening/late phases it widens NPC
+## perception radius (PLAN.md: Level 3 — flashlight at night).
+func _toggle_flashlight() -> void:
+	flashlight_on = not flashlight_on
+	var lamp: SpotLight3D = guard.get_node_or_null("Head/Flashlight") as SpotLight3D
+	if lamp:
+		lamp.visible = flashlight_on
+	hud.set_flashlight(flashlight_on)
+	hud.log(Strings.lookup("flashlight.on") if flashlight_on else Strings.lookup("flashlight.off"))
+
+## Lock or unlock the restricted door (PLAN.md: Level 3). Locked doors thwart
+## FORCE_ENTRY attempts during the reaction flow.
+func _toggle_door_lock() -> void:
+	door.toggle()
+	if world_builder:
+		world_builder.set_door_locked(door.locked)
+	hud.set_door(door.locked)
+	hud.log(Strings.lookup("door.locked") if door.locked else Strings.lookup("door.unlocked"))
+
 ## Cycle the dialogue tone (Professional → Friendly → Firm → Suspicious).
 func _cycle_tone() -> void:
 	var idx := TONE_ORDER.find(selected_tone)
@@ -368,11 +408,20 @@ func _react_to_outcome(controller: Object, outcome: Dictionary) -> void:
 			hud.log(Strings.fmt("react.threaten", [name]))
 			coordinator.crowd.apply_event("aggressive_behavior")
 		Rules.Reaction.FORCE_ENTRY:
-			hud.log(Strings.fmt("react.force_entry", [name]))
-			coordinator.crowd.apply_event("emergency_responder")
-			coordinator.reputation.apply("security_failure", -5.0, "forced entry attempt")
+			var force_result: Dictionary = door.attempt_force()
+			if force_result.get("succeeded", false):
+				hud.log(Strings.fmt("react.force_entry", [name]))
+				coordinator.crowd.apply_event("emergency_responder")
+				coordinator.reputation.apply("security_failure", -5.0, "forced entry attempt")
+			else:
+				hud.log(Strings.fmt("door.thwarted", [name]))
+				coordinator.crowd.apply_event("aggressive_behavior")
+				coordinator.reputation.apply("prop", -2.0, "forcing attempt (locked door)")
 		Rules.Reaction.RETURN_LATER:
 			hud.log(Strings.fmt("react.return_later", [name]))
+		Rules.Reaction.CALL_SOMEONE:
+			hud.log(Strings.fmt("react.call_someone", [name]))
+			coordinator.crowd.apply_event("aggressive_behavior")
 		_:
 			hud.log(Strings.lookup("react.none"))
 
@@ -576,6 +625,9 @@ func _perception_pass() -> void:
 	if guard == null:
 		return
 	var guard_pos: Vector3 = guard.global_position
+	var lit_bonus := 0.0
+	if flashlight_on and coordinator.current_phase >= Rules.Phase.EVENING:
+		lit_bonus = 4.0
 	for avatar in npcs:
 		if not is_instance_valid(avatar):
 			continue
@@ -584,7 +636,7 @@ func _perception_pass() -> void:
 			continue
 		var distance: float = (avatar.global_position - guard_pos).length()
 		var already_noticed: bool = controller.guard_noticed
-		var perception: Dictionary = controller.perceive_guard(distance)
+		var perception: Dictionary = controller.perceive_guard(distance, lit_bonus)
 		if perception.get("noticed", false) and not already_noticed:
 			# First-time notice: log a subtle reaction.
 			var name: String = (controller.profile.display_name if controller.profile else "Person")