fix(client): apply arch review corrections — 640px dialogue width, D-067 chime

DIALOGUE_MAX_WIDTH: correct to 640px (20 × TILE_SIZE) per Tyre architecture
  review. D-076 updated in decisions/perception.md with amendment note.
  Initial 1920px was D-061 "max-width" but readability wins at 640px.

D-067 recognition chime: wire sfx_monologue_chime to fog entity recognition
  onset. AudioManager.CHIME_RECOGNITION constant added. main.gd tracks seen
  entity IDs in _known_recognition_ids; fires chime on first appearance in
  pending_recognitions, expires when entity leaves the queue. UISounds bus
  (not WorldSFX) per D-038 "monologue chime is a UI sound." Tests added
  to test_audio_bus_routing.gd (Layer 2b).

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

client/scripts/autoloads/audio_manager.gd

@@ -5,6 +5,11 @@ extends Node
 ## No-op fallback when audio assets absent (D-038).
 ## Spatial audio positioning for close-range sounds (D-018).
 
+# --- D-067: Recognition chime asset key ---
+# Fires on first fog recognition (cognitive delay onset). UISounds bus (not WorldSFX).
+# Matches sfx_monologue_chime.ogg from D-038 — "neural lattice firing" feel.
+const CHIME_RECOGNITION := "sfx_monologue_chime"
+
 # --- Bus names (D-068) ---
 const BUS_MUSIC := "Music"
 const BUS_AMBIENT := "Ambient"