feat(matrix): add adapter baseline and platform-aware command hints

adapter/matrix/room_router.py

@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+from adapter.matrix.store import get_room_meta, next_chat_id, set_room_meta
+from core.store import StateStore
+
+
+async def resolve_chat_id(store: StateStore, room_id: str, matrix_user_id: str) -> str:
+    meta = await get_room_meta(store, room_id)
+    if meta and meta.get("chat_id"):
+        return meta["chat_id"]
+
+    chat_id = await next_chat_id(store, matrix_user_id)
+    await set_room_meta(
+        store,
+        room_id,
+        {
+            "room_type": "chat",
+            "chat_id": chat_id,
+            "display_name": f"Чат {chat_id}",
+            "matrix_user_id": matrix_user_id,
+        },
+    )
+    return chat_id