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/data/ui-strings.yaml

@@ -205,3 +205,10 @@ character_select:
   detective_name: "Commission Investigator"
   detective_tagline: "The manifests don't add up. Someone in this district knows why."
   confirm: "Begin"
+  # #588: Card display strings — name, role, tone per archetype
+  smuggler_card_name: "Smuggler"
+  smuggler_card_role: "Freight logistics worker — Sova Transit"
+  smuggler_card_tone: "Insider access. Social camouflage. The ring is your daily life."
+  detective_card_name: "Detective"
+  detective_card_role: "Commission investigator — External assignment"
+  detective_card_tone: "Institutional authority. Analytical lattice. You were sent here."