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/test/tests/test_scenarios.gd

@@ -41,6 +41,42 @@ var _spawn_count := 0
 func _on_spawn(_profile: NpcProfile, _intent: String, _id: String) -> void:
 	_spawn_count += 1
 
+func test_late_phase_reaches_violent_event() -> bool:
+	## Bug fix: the LATE phase never fired because no shift_phases entry existed.
+	var scenario: VenueScenario = ScenarioFactory.hollywood_building()
+	var coordinator := ShiftCoordinator.new()
+	coordinator.setup(scenario, 900.0, 1)
+	coordinator.start()
+	for i in 760:
+		coordinator.tick(1.0)
+	var a := TestUtils.check_eq(coordinator.current_phase, Rules.Phase.LATE, "LATE phase reached by 760s")
+	var eligible := scenario.events_in_phase(Rules.Phase.LATE)
+	var found := false
+	for e in eligible:
+		if e.get("id", "") == "violent_emergency_event":
+			found = true
+	var b := TestUtils.check(found, "violent event is eligible in LATE phase")
+	# All venues declare the LATE phase honestly.
+	var c := true
+	for venue in [ScenarioFactory.hollywood_building(), ScenarioFactory.joke_shop(), ScenarioFactory.tv_studio()]:
+		if not venue.shift_phases.has(Rules.Phase.LATE):
+			c = false
+	return a and b and TestUtils.check(c, "all venues declare a LATE phase")
+
+func test_protester_archetype_present() -> bool:
+	var profiles := ScenarioFactory.shared_profiles()
+	var protester_found := false
+	for p in profiles:
+		if p.id == "protester":
+			protester_found = true
+	var a := TestUtils.check(protester_found, "protester profile defined")
+	var in_pool := false
+	for venue in [ScenarioFactory.hollywood_building(), ScenarioFactory.tv_studio()]:
+		for e in venue.event_pool:
+			if e.get("npc_type", -1) == Rules.NpcType.PROTESTER:
+				in_pool = true
+	return a and TestUtils.check(in_pool, "protester event referenced in public venues")
+
 func test_shift_coordinator_runs_a_shift() -> bool:
 	var scenario: VenueScenario = ScenarioFactory.hollywood_building()
 	var coordinator := ShiftCoordinator.new()