fix(client): address PR #24 review — 5 critical bugs, 3 warnings, 8 suggestions

Critical:
- Protocol test assertions updated v6→v7 (test_protocol_v6.gd)
- Dialogue signal connections wired (option_selected→DialogueResponse,
  dialogue_dismissed→DialogueEnd sent to server via SimBridge)
- Consume-once race fixed: _consume_dialogue() checks is_dialogue_active()
  before re-showing; dialogue_id tracking prevents re-trigger during fade
- Dialogue box responsive: _update_layout() clamps width to MAX_WIDTH_PX
  (832px) or 65% viewport, height to 20% viewport (MAX_HEIGHT_RATIO)
- Auto-pause added: SimBridge.send_input(PAUSE) on dialogue open/close

Warnings:
- Test coverage: 16 new tests in test_protocol_v7.gd (pending_recognitions
  decode, current_dialogue, GameState, SimBridge mock data, insert colors)
- queue_redraw() optimization: early return when no entities and no pings
- Fixed 200px height → responsive 20% viewport via _update_layout()

Suggestions:
- WASD detection refactored to _WALK_AWAY_ACTIONS array loop
- Button colors reference Constants.INSERT_COLOR_TEXT/HOVER/ACTIVE
- Named constants: COLOR_TRANSITION_START, SILHOUETTE_APPEAR_THRESHOLD,
  SILHOUETTE_SIZE with explanatory comments
- Bounds check: MAX_PENDING_RECOGNITIONS=64 with truncation warning
- Mock dialogue sustained across ticks (not 1-tick flash)
- COLOR_PING coupling with cursor documented as intentional
- Consume helpers extracted: _consume_monologue(), _consume_dialogue()

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

client/scripts/main.gd

@@ -13,12 +13,22 @@ extends Node2D
 @onready var stance_indicator = $UILayer/StanceIndicator  # D-053: z-layer 7
 @onready var cursor_renderer = $UILayer/CursorRenderer  # D-056: z-layer 7
 
+# Tracks the dialogue_id from dialogue_box to prevent consume-once race during fade-in.
+# If a new snapshot arrives with null dialogue while fade-in is still running,
+# we don't re-trigger show_dialogue because _last_dialogue_id still matches.
+var _last_dialogue_id: int = 0
+
 func _ready() -> void:
 	print("The Settled Reach — client initialized")
 
 	# Connect to simulation (will use test mode initially)
 	SimBridge.connect_to_sim()
 
+	# D-061: Connect dialogue box signals
+	if dialogue_box:
+		dialogue_box.option_selected.connect(_on_dialogue_option_selected)
+		dialogue_box.dialogue_dismissed.connect(_on_dialogue_dismissed)
+
 func _process(_delta: float) -> void:
 	# Main game loop: poll snapshot, apply state, flush input
 	var snapshot = SimBridge.poll_snapshot()
@@ -46,22 +56,10 @@ func _process(_delta: float) -> void:
 			fog_entities.update_from_state()
 
 		# Show monologue if server sent one this tick (#414)
-		# Consume-once: set to null after showing to prevent re-display.
-		# Single monologue per snapshot is guaranteed by server.
-		if GameState.current_monologue != null and monologue_display:
-			var mono: Dictionary = GameState.current_monologue
-			monologue_display.show_monologue(mono.get("text", ""), mono.get("duration_seconds", 5.0))
-			GameState.current_monologue = null
+		_consume_monologue()
 
 		# D-061: Show dialogue if server sent one this tick (#434)
-		if GameState.current_dialogue != null and dialogue_box:
-			var dlg: Dictionary = GameState.current_dialogue
-			dialogue_box.show_dialogue(
-				dlg.get("npc_name", ""),
-				dlg.get("speech", ""),
-				dlg.get("options", [])
-			)
-			GameState.current_dialogue = null
+		_consume_dialogue()
 
 	# Track camera to player position every frame (D-015: locked, no panning)
 	# Camera2D smoothing handles interpolation — we just set the target
@@ -92,3 +90,57 @@ func _process(_delta: float) -> void:
 					"verb": null,
 				}
 		SimBridge.send_input(input)
+
+
+# Consume-once: show monologue text, then clear to prevent re-display.
+# Single monologue per snapshot is guaranteed by server.
+func _consume_monologue() -> void:
+	if GameState.current_monologue != null and monologue_display:
+		var mono: Dictionary = GameState.current_monologue
+		monologue_display.show_monologue(mono.get("text", ""), mono.get("duration_seconds", 5.0))
+		GameState.current_monologue = null
+
+
+# Consume-once with ID tracking: show dialogue, then clear.
+# Uses dialogue_id to avoid re-triggering during fade-in if a null snapshot arrives.
+func _consume_dialogue() -> void:
+	if GameState.current_dialogue == null or not dialogue_box:
+		return
+	# Don't re-show the same dialogue if it's already active with the same content
+	if dialogue_box.is_dialogue_active():
+		GameState.current_dialogue = null
+		return
+	var dlg: Dictionary = GameState.current_dialogue
+	dialogue_box.show_dialogue(
+		dlg.get("npc_name", ""),
+		dlg.get("speech", ""),
+		dlg.get("options", [])
+	)
+	_last_dialogue_id = dialogue_box.get_dialogue_id()
+	GameState.current_dialogue = null
+
+
+# D-061: Handle dialogue option selection → send to server
+func _on_dialogue_option_selected(index: int, text: String) -> void:
+	SimBridge.send_input({
+		"action": InputMapper.Action.INTERACT,
+		"timestamp_msec": Time.get_ticks_msec(),
+		"action_data": {
+			"target_entity_id": null,
+			"verb": "DialogueResponse",
+			"dialogue_option_index": index,
+			"dialogue_option_text": text,
+		},
+	})
+
+
+# D-064: Handle walk-away → send DialogueEnd to server
+func _on_dialogue_dismissed() -> void:
+	SimBridge.send_input({
+		"action": InputMapper.Action.INTERACT,
+		"timestamp_msec": Time.get_ticks_msec(),
+		"action_data": {
+			"target_entity_id": null,
+			"verb": "DialogueEnd",
+		},
+	})