feat(client): character select, triangle activation consumer, news ticker

Sprint 24 Signal — three client tickets delivering the player-facing
storyteller feedback loop:

- #588: Character archetype select screen between New Game and session
  start. Two-card UI (Smuggler/Detective), keyboard+mouse, ESC cancels.
  GameState.character_archetype persisted and sent in StartupMessage.
  PROTOCOL_VERSION bumped to 19.
- #590: Triangle crisis event consumer. Decodes triangle_crisis_events
  from snapshot, fires sfx_monologue_chime_urgent once per triangle per
  session via AudioManager.CHIME_ACTIVATION.
- #592: News ticker HUD element. Scrolling marquee on UILayer, visible
  only when current_ticker is present in snapshot (Last Shift zone).
  Zero-arg update_from_state reads from GameState.current_snapshot.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/scripts/main.gd

@@ -23,6 +23,7 @@ extends Node2D
 @onready var settings_dialog = $ModalLayer/SettingsDialog     # #528: audio settings (ESC/OPEN_MENU)
 @onready var loading_screen = $ModalLayer/LoadingScreen       # #257: blocking overlay during load
 @onready var debug_console = $ModalLayer/DebugConsole         # #581: tilde debug console
+@onready var news_ticker = $UILayer/NewsTicker                # #592: scrolling headline bar (D-049 z-7)
 
 var _last_dialogue_npc_id: int = -1  # D-064: NPC entity_id for WalkAway input
 var _last_dialogue_npc_name: String = ""  # #535: NPC name for dialogue_response attribution
@@ -31,6 +32,7 @@ var _last_monologue_tick: int = -1       # Prevent re-consuming monologue when s
 var _last_dialogue_tick: int = -1
 var _last_confrontation_tick: int = -1  # Deduplicate confrontation_monologue signals within same tick
 var _known_recognition_ids: Dictionary = {}  # D-067: entity_ids that have already chimed
+var _known_triangle_ids: Dictionary = {}     # #590: triangle_ids that have already fired the activation chime
 var _flash_rect: ColorRect = null  # #502/#501: ephemeral screen flash overlay (shared: teleport preempts amber)
 var _teleport_in_progress: bool = false  # #501/#117: forces camera snap (not lerp) on next _process frame
 var _pending_record_inputs: Array = []   # #507: accumulates server-bound inputs across frames; flushed into record_tick() on snapshot arrival
@@ -102,12 +104,15 @@ func _ready() -> void:
 	if fog_entities:
 		_router.register_always(fog_entities.update_from_state)
 	_router.register_always(_play_recognition_chimes)
+	_router.register_always(_handle_triangle_crisis_events)
 	if gauntlet_hud:
 		_router.register_always(gauntlet_hud.update_from_state)
 	if checklist_overlay:
 		_router.register_always(checklist_overlay.update_from_state)
 	if time_display:
 		_router.register_always(time_display.update_from_state)
+	if news_ticker:
+		_router.register_always(news_ticker.update_from_state)
 	if journal_panel:
 		_router.register_always(journal_panel.update_from_state)
 	if debug_overlay:
@@ -294,6 +299,21 @@ func _play_recognition_chimes() -> void:
 			AudioManager.play(AudioManager.CHIME_RECOGNITION)
 
 
+# #590 D-072/D-089: Triangle activation consumer — fires sfx_monologue_chime_urgent once
+# per triangle_id. The tell_state on the activated NPC and subsequent proximity monologue
+# lines are the visible consequence (D-039 wow moment #2 "The Character's Eye").
+# No overlay is shown — the chime is the only client-side reaction (D-039 intent).
+func _handle_triangle_crisis_events() -> void:
+	var events: Array = GameState.current_snapshot.get("triangle_crisis_events", [])
+	for ev in events:
+		if not ev is Dictionary or not ev.has("triangle_id"):
+			continue
+		var tid: int = ev.triangle_id
+		if not _known_triangle_ids.has(tid):
+			_known_triangle_ids[tid] = true
+			AudioManager.play(AudioManager.CHIME_ACTIVATION, AudioManager.BUS_UI_SOUNDS)
+
+
 # D-073 (#529): Zone ambient crossfade — reads zone_id from GameState.current_zone_id
 # (extracted in apply_snapshot(), server-authoritative per D-020).
 # Calls AudioManager.set_zone() when zone changes (AudioManager handles crossfade).