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/protocol/protocol.gd

@@ -11,7 +11,7 @@ class_name Protocol
 
 ## Protocol version — must match server PROTOCOL_VERSION in bridge/types.rs.
 ## Reject snapshots where version != this value.
-const PROTOCOL_VERSION: int = 6
+const PROTOCOL_VERSION: int = 7
 
 
 # -- Decode: bytes from server → GDScript types --------------------------------
@@ -122,6 +122,21 @@ static func decode_snapshot(bytes: PackedByteArray) -> Variant:
 					"slot": int(raw_item.get("slot", 0)),
 				})
 
+	# v7: pending_recognitions (#431, D-059/D-060) — cognitive delay fog entities
+	var pending_recognitions: Array = []
+	var raw_recognitions: Variant = raw.get("pending_recognitions")
+	if raw_recognitions is Array:
+		for raw_pr in raw_recognitions:
+			if raw_pr is Dictionary and raw_pr.has("entity_id") and raw_pr.has("x") and raw_pr.has("y"):
+				pending_recognitions.append({
+					"entity_id": int(raw_pr["entity_id"]),
+					"x": float(raw_pr["x"]),
+					"y": float(raw_pr["y"]),
+					"z": int(raw_pr.get("z", 0)),
+					"remaining_ticks": int(raw_pr.get("remaining_ticks", 0)),
+					"total_delay_ticks": int(raw_pr.get("total_delay_ticks", 1)),
+				})
+
 	return {
 		"tick": tick,
 		"entities": entities,
@@ -134,6 +149,7 @@ static func decode_snapshot(bytes: PackedByteArray) -> Variant:
 		"visible_tiles": visible_tiles,
 		"nearby_interactions": nearby_interactions,
 		"current_monologue": current_monologue,
+		"pending_recognitions": pending_recognitions,
 	}