feat(client): Sprint 12 — renderer fix, sound pipeline, medium-range indicators

#345: entity_renderer.gd already used entity_id; added regression tests
  confirming old "id" field is rejected and "entity_id" is accepted.

#447 (OQ-29): DIALOGUE_MAX_WIDTH = 1920 added to constants.gd. Full
  viewport width at target resolution (60 × TILE_SIZE), per D-061 Lead
  directive "max-width". Recorded as D-076 in decisions/perception.md.

#126: SoundIndicatorRenderer — fog-edge directional arrows for medium-range
  sound events (D-018). Node2D at z:951 in World scene. Color-coded per
  D-018/D-069 (neutral/voice/danger). GameState.medium_sound_events
  partitions Medium events from snapshot sound_events field. Tests added
  to test_rendering.gd; Hoshe's test_sound_indicators.gd stubs updated.

#125: Close-range stereo audio pipeline wired. AudioManager.play_sound_event()
  maps event_type to D-038 asset key (Footstep/FootstepSprint → sfx_footstep_*).
  GameState.close_sound_events partitions Close events. main.gd calls
  _play_close_sound_events() each snapshot tick. test_audio_bus_routing.gd
  Layer 4 stubs upgraded to real tests.

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

client/scripts/rendering/world_renderer.gd

@@ -16,6 +16,7 @@ extends Node2D
 @onready var tile_renderer = $FogGroup/FloorTiles
 @onready var fog_renderer = $FogOverlay
 @onready var entity_renderer = $FogGroup/YSortGroup/Entities
+@onready var sound_indicator_renderer = $SoundIndicators  # #126 D-018 medium-range indicators
 
 var _last_tick: int = -1
 
@@ -42,3 +43,7 @@ func update_from_state() -> void:
 	# Update entity sprites
 	if entity_renderer and entity_renderer.has_method("update_entities"):
 		entity_renderer.update_entities(GameState.visible_entities)
+
+	# D-018 #126: Update medium-range sound indicators
+	if sound_indicator_renderer and sound_indicator_renderer.has_method("update_sound_events"):
+		sound_indicator_renderer.update_sound_events(GameState.medium_sound_events)