fix(client): correct 5 bugs found in pre-PR review

- sound_indicator_renderer: draw_colored_polygon → draw_polygon (runtime crash)
- sound_indicator_renderer: append+dedup instead of clear — indicators now
  survive 3.5s instead of dying after one server tick
- dialogue_box: wire Constants.DIALOGUE_MAX_WIDTH (640px) instead of
  hardcoded 832px MAX_WIDTH_PX
- dialogue_box.tscn: update default offsets to ±320 (was ±416)
- decisions/perception.md: fix footer typo (1920px → 640px)
- tests updated for new append/dedup indicator behavior

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

client/tests/test_rendering.gd

@@ -438,24 +438,25 @@ func test_sound_indicator_drops_events_without_position() -> void:
 	assert_that(renderer._indicators.size()).is_equal(1)
 	renderer.queue_free()
 
-func test_sound_indicator_replaces_events_on_update() -> void:
+func test_sound_indicator_appends_new_events() -> void:
 	var renderer := _make_sound_indicator_renderer()
 	renderer.update_sound_events([
 		{"x": 1.0, "y": 1.0, "event_type": "Voice"},
 		{"x": 2.0, "y": 2.0, "event_type": "Footstep"},
 	])
 	assert_that(renderer._indicators.size()).is_equal(2)
-	# New update replaces all previous events
+	# New update appends — existing indicators persist until they expire
 	renderer.update_sound_events([{"x": 5.0, "y": 5.0, "event_type": "Footstep"}])
-	assert_that(renderer._indicators.size()).is_equal(1)
+	assert_that(renderer._indicators.size()).is_equal(3)
 	renderer.queue_free()
 
-func test_sound_indicator_empty_update_clears_indicators() -> void:
+func test_sound_indicator_empty_update_preserves_existing() -> void:
 	var renderer := _make_sound_indicator_renderer()
 	renderer.update_sound_events([{"x": 3.0, "y": 3.0, "event_type": "Voice"}])
 	assert_that(renderer._indicators.size()).is_equal(1)
+	# Empty update does not clear existing indicators — they expire via _process
 	renderer.update_sound_events([])
-	assert_that(renderer._indicators.size()).is_equal(0)
+	assert_that(renderer._indicators.size()).is_equal(1)
 	renderer.queue_free()
 
 func test_sound_indicator_color_voice() -> void:
@@ -479,6 +480,15 @@ func test_sound_indicator_color_neutral_for_unknown() -> void:
 	assert_that(renderer._color_for_type("Unknown")).is_equal(SoundIndicatorRenderer.COLOR_NEUTRAL)
 	renderer.queue_free()
 
+func test_sound_indicator_deduplicates_same_position() -> void:
+	var renderer := _make_sound_indicator_renderer()
+	renderer.update_sound_events([{"x": 5.0, "y": 5.0, "event_type": "Voice"}])
+	assert_that(renderer._indicators.size()).is_equal(1)
+	# Same position again — should reset timer, not add a duplicate
+	renderer.update_sound_events([{"x": 5.0, "y": 5.0, "event_type": "Voice"}])
+	assert_that(renderer._indicators.size()).is_equal(1)
+	renderer.queue_free()
+
 func test_sound_indicator_elapsed_starts_at_zero() -> void:
 	var renderer := _make_sound_indicator_renderer()
 	renderer.update_sound_events([{"x": 10.0, "y": 5.0, "event_type": "Voice"}])

client/tests/test_sound_indicators.gd

@@ -200,9 +200,25 @@ func test_indicator_does_not_crash_for_empty_events() -> void:
 	indicator.set_script(script)
 	add_child(indicator)
 	indicator.update_sound_events([])
+	# Empty update on fresh renderer — no indicators exist, no crash
 	assert_that(indicator._indicators.size()).is_equal(0)
 	indicator.queue_free()
 
+func test_indicator_existing_survive_empty_update() -> void:
+	## Existing indicators persist through an empty update (expire via _process only).
+	var script: GDScript = _load_indicator_script()
+	if script == null:
+		push_warning("TestSoundIndicators: sound_indicator_renderer.gd not found")
+		return
+	var indicator := Node2D.new()
+	indicator.set_script(script)
+	add_child(indicator)
+	indicator.update_sound_events([{"x": 5.0, "y": 5.0, "event_type": "Voice"}])
+	assert_that(indicator._indicators.size()).is_equal(1)
+	indicator.update_sound_events([])
+	assert_that(indicator._indicators.size()).is_equal(1)
+	indicator.queue_free()
+
 func test_indicator_stores_valid_medium_events() -> void:
 	## #126: update_sound_events must store events with x and y fields.
 	var script: GDScript = _load_indicator_script()