feat(client): add fog entity visualization and wire Sprint 7 UI (#431, #434)

Fog entity cognitive delay rendering (D-059/D-060): sonar-style sound
pings (3 concentric rings, 1.5s fade), unrecognized grey blobs with
breathing pulse, D-033 color transition at 50% recognition progress,
±0.5 tile position drift. FogEntities node at z:950 between fog
shader and InsertOverlay.

Protocol v7 bump to match server PR #23 (pending_recognitions field).
Wires dialogue box and fog entities into game loop with mock test data.

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

client/scripts/autoloads/game_state.gd

@@ -29,6 +29,12 @@ var current_monologue: Variant = null  # {id, text, duration_seconds} or null
 var player_stance: String = "Walk"  # Sprint/Walk/Careful/Crouch
 var player_inventory: Array = []  # [{item_id, name, slot}]
 
+# v7 fields (#434, D-061)
+var current_dialogue: Variant = null  # {npc_name, speech, options: [String]} or null
+
+# v7 fields (#431, D-059/D-060)
+var pending_recognitions: Array = []  # [{entity_id, x, y, z, remaining_ticks, total_delay_ticks}]
+
 func apply_snapshot(snapshot: Dictionary) -> void:
 	current_snapshot = snapshot
 
@@ -96,6 +102,18 @@ func apply_snapshot(snapshot: Dictionary) -> void:
 	else:
 		player_inventory = []
 
+	# v7: current_dialogue (#434, D-061)
+	if snapshot.has("current_dialogue") and snapshot.current_dialogue is Dictionary:
+		current_dialogue = snapshot.current_dialogue
+	else:
+		current_dialogue = null
+
+	# v7: pending_recognitions (#431, D-059/D-060)
+	if snapshot.has("pending_recognitions") and snapshot.pending_recognitions is Array:
+		pending_recognitions = snapshot.pending_recognitions
+	else:
+		pending_recognitions = []
+
 	# v2: visible_tiles with visibility sectors
 	# Derives visible_positions when not explicitly provided (real server mode)
 	if snapshot.has("visible_tiles") and snapshot.visible_tiles is Array and snapshot.visible_tiles.size() > 0: