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/autoloads/audio_manager.gd

@@ -10,6 +10,11 @@ extends Node
 # Matches sfx_monologue_chime.ogg from D-038 — "neural lattice firing" feel.
 const CHIME_RECOGNITION := "sfx_monologue_chime"
 
+# --- D-067: Triangle activation chime (#590, D-072/D-089) ---
+# Fires once per session when the triangle's tell_state shifts to RoutineDeviation.
+# Sharper variant (D-067: "contradiction/anomaly") — sfx_monologue_chime_urgent.ogg.
+const CHIME_ACTIVATION := "sfx_monologue_chime_urgent"
+
 # --- Bus names (D-068) ---
 const BUS_MUSIC := "Music"
 const BUS_AMBIENT := "Ambient"

client/scripts/autoloads/game_state.gd

@@ -92,6 +92,11 @@ var debug_response: Variant = null
 # Format: user://saves/<game-id>/<filename>.sav or "" if no pending load.
 var pending_load_path: String = ""
 
+# #588: Character archetype chosen at character select screen.
+# "detective" or "smuggler". Set before game scene loads; sent in StartupMessage.
+# Default: "detective" — fallback for legacy saves without character.txt.
+var character_archetype: String = "detective"
+
 # v7 fields (#431, D-059/D-060)
 var pending_recognitions: Array = []  # [{entity_id, x, y, z, remaining_ticks, total_delay_ticks}]
 

client/scripts/autoloads/session_manager.gd

@@ -47,11 +47,12 @@ func new_game() -> String:
 
 
 ## Resume an existing game session by setting the active game-id.
-## Restores world_seed from the save directory for D-010 deterministic replay.
+## Restores world_seed and character_archetype from the save directory.
 func resume_game(game_id: String) -> void:
 	GameState.current_game_id = game_id
 	var save_path := SAVES_DIR + game_id + "/"
 	GameState.world_seed = _read_seed_file(save_path)
+	GameState.character_archetype = _read_archetype_file(save_path)
 
 
 ## List all game directories under user://saves/ sorted by last-modified (most recent first).
@@ -146,6 +147,24 @@ func _read_seed_file(save_path: String) -> int:
 	return file.get_64() & 0x7FFFFFFFFFFFFFFF
 
 
+## Write character_archetype to save directory. Called after new_game() creates the dir.
+func save_character_archetype(game_id: String, archetype: String) -> void:
+	var save_path := SAVES_DIR + game_id + "/"
+	var file := FileAccess.open(save_path + "character.txt", FileAccess.WRITE)
+	if file == null:
+		push_error("SessionManager: failed to write character.txt: %s" % error_string(FileAccess.get_open_error()))
+		return
+	file.store_string(archetype)
+
+
+## Read character_archetype from save directory. Returns "detective" if missing (legacy saves).
+func _read_archetype_file(save_path: String) -> String:
+	var file := FileAccess.open(save_path + "character.txt", FileAccess.READ)
+	if file == null:
+		return "detective"
+	return file.get_as_text().strip_edges()
+
+
 func _find_newest_save(dir_path: String) -> String:
 	var dir := DirAccess.open(dir_path)
 	if dir == null:

client/scripts/autoloads/sim_bridge.gd

@@ -233,7 +233,7 @@ func _process(delta: float) -> void:
 
 		# Send startup message with world_seed (#175, D-010/D-029).
 		# Server blocks waiting for this before entering the tick loop.
-		var startup_bytes := Protocol.encode_startup_message(GameState.world_seed)
+		var startup_bytes := Protocol.encode_startup_message(GameState.world_seed, GameState.character_archetype)
 		if startup_bytes.size() > 0:
 			var send_err := _bridge.send_message(startup_bytes)
 			if send_err != OK: