mqtt_overlays: убраны assist_question / assist_response

Conversation events HA Assist не приходят (архитектурное ограничение).
Чтобы placeholders ❯ Вы: ... и ✎ HA: ... не висели на экране без
данных — overlay'и убраны до решения вопроса с источником диалога.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docker/mqtt_overlays.json

@@ -1,5 +1,7 @@
 {
   "version": 1,
+  "grid_cols": 8,
+  "grid_rows": 8,
   "_doc": "MQTT-driven text overlays. Каждый блок = одна MQTT-подписка + persistent text overlay в фиксированной позиции на output frame'е. Не привязан к layout cells. anchor: right-bottom/right-top/left-bottom/left-top/center. format: printf-style для extracted значения (для double — \"%+.1f°C\"). json_field пустой → raw payload как string.",
 
   "overlays": [
@@ -15,38 +17,6 @@
       "color": [255, 255, 255],
       "alpha": 230,
       "font_path": "/fonts/DejaVuSans-Bold.ttf"
-    },
-    {
-      "id": "assist_question",
-      "_doc": "Последний вопрос пользователя к HA Assist. Plain-text retained.",
-      "topic": "assist/conversation/text",
-      "json_field": "",
-      "format": "🗣 %s",
-      "anchor": "left-bottom",
-      "margin_x": 32,
-      "margin_y": 78,
-      "pixel_size": 22,
-      "color": [200, 220, 255],
-      "alpha": 230,
-      "bg_alpha": 180,
-      "bg_pad": 10,
-      "placeholder": "🗣 ..."
-    },
-    {
-      "id": "assist_response",
-      "_doc": "Ответ HA Assist последнего turn'а. Plain-text retained.",
-      "topic": "assist/conversation/response",
-      "json_field": "",
-      "format": "🤖 %s",
-      "anchor": "left-bottom",
-      "margin_x": 32,
-      "margin_y": 32,
-      "pixel_size": 22,
-      "color": [255, 255, 255],
-      "alpha": 230,
-      "bg_alpha": 180,
-      "bg_pad": 10,
-      "placeholder": "🤖 ..."
     }
   ]
 }