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:

client/scripts/autoloads/sim_bridge.gd

@@ -9,6 +9,7 @@ var _test_tick: int = 0
 var _test_player_pos: Vector2i = Vector2i(10, 10)
 var _test_facing: String = "North"
 var _test_input_queue: Array = []  # Queued actions for test mode
+var _test_in_dialogue: bool = false  # Mock dialogue state (#434)
 var _last_snapshot: Variant = null  # Most recent decoded snapshot (consumed by poll_snapshot)
 var _outbound_buffer: Array[Dictionary] = []  # Raw inputs awaiting batch encode + transport
 
@@ -38,6 +39,7 @@ func reset_test_state() -> void:
 	_test_player_pos = Vector2i(10, 10)
 	_test_facing = "North"
 	_test_input_queue.clear()
+	_test_in_dialogue = false
 
 # Change connection state and emit signal
 func _set_state(new_state: ConnectionState) -> void:
@@ -263,12 +265,22 @@ func _test_snapshot() -> Dictionary:
 
 	# Process queued inputs
 	for action_name in _test_input_queue:
+		if action_name == "Interact":
+			# Mock dialogue trigger (#434): if near NPC, start dialogue
+			var npc_pos := Vector2i(12, 9)
+			var dist := absi(_test_player_pos.x - npc_pos.x) + absi(_test_player_pos.y - npc_pos.y)
+			if dist <= 2 and _test_has_los(_test_player_pos, npc_pos):
+				_test_in_dialogue = true
+			continue
 		var delta := _action_to_delta(action_name)
 		var new_pos := _test_player_pos + delta
 		if _test_is_walkable(new_pos):
 			_test_player_pos = new_pos
 			if delta != Vector2i.ZERO:
 				_test_facing = _delta_to_facing(delta)
+				# Walk-away dismisses dialogue (D-064)
+				if _test_in_dialogue:
+					_test_in_dialogue = false
 	_test_input_queue.clear()
 
 	var px := _test_player_pos.x
@@ -320,6 +332,38 @@ func _test_snapshot() -> Dictionary:
 			"duration_seconds": 5.0,
 		}
 
+	# v7: mock dialogue (#434, D-061) — triggered by Interact near NPC
+	# One-shot: dialogue data sent once on the trigger tick, not every frame
+	var dialogue: Variant = null
+	if _test_in_dialogue:
+		dialogue = {
+			"npc_name": "Kael",
+			"speech": "Haven't seen you around the transit hub before. You new to Sova, or just passing through?",
+			"options": [
+				"Just arrived. Still getting my bearings.",
+				"Passing through. Know where I can find work?",
+				"I'm looking for someone.",
+			],
+		}
+		_test_in_dialogue = false
+
+	# v7: mock pending_recognitions (#431, D-059/D-060) — cognitive delay fog entity
+	# Entity at (13, 12) in fog: starts as grey blob, transitions to recognized over 6 ticks.
+	# Cycles every 12 ticks: 6 ticks recognizing, 6 ticks off (simulates repeat encounters).
+	var pending_recs: Array = []
+	var cycle_pos := _test_tick % 12
+	if cycle_pos < 6:
+		var total_delay := 6
+		var remaining := total_delay - cycle_pos
+		pending_recs.append({
+			"entity_id": 100,
+			"x": 13.5,
+			"y": 12.5,
+			"z": 0,
+			"remaining_ticks": remaining,
+			"total_delay_ticks": total_delay,
+		})
+
 	return {
 		"tick": _test_tick,
 		"version": Protocol.PROTOCOL_VERSION,
@@ -338,6 +382,8 @@ func _test_snapshot() -> Dictionary:
 		"visible_positions": _test_visible_positions(),
 		"nearby_interactions": nearby,
 		"current_monologue": monologue,
+		"current_dialogue": dialogue,
+		"pending_recognitions": pending_recs,
 	}
 
 # Generate a small test room: 8x6 room with walls, a door, and floor