Long-press message selection + delete (message.delete frame, outbox removal, all-device sync)

gateway-plugin/adapter.py

@@ -2216,6 +2216,52 @@ class AndroidAdapter(BasePlatformAdapter):
         )
         await self._ws_server.send_to(device_id, resp)
 
+    # ── Message deletion (app -> agent) ───────────────────────────────────
+
+    async def on_message_delete(self, frame: protocol.Frame, device_id: str) -> None:
+        """Handle an inbound ``message.delete`` request.
+
+        Removes the requested message(s) from the outbox (so ``history`` and
+        ``sync`` no longer return them) and broadcasts ``message.deleted`` to
+        every device (outboxed too, so an offline device learns of the
+        deletion on its next ``sync``). Deleting is idempotent: a message that
+        is already gone (pruned by retention) simply yields 0 removed rows,
+        and the ``message.deleted`` broadcast is still emitted so live caches
+        drop it.
+        """
+        payload = frame.payload
+        chat_id = frame.chat_id or payload.get("chat_id")
+        if not isinstance(chat_id, str) or not chat_id.strip():
+            await self._ws_server.send_to(
+                device_id,
+                protocol.error(protocol.ERR_NOT_FOUND, "message.delete requires chat_id", id=frame.id),
+            )
+            return
+        chat_id = chat_id.strip()
+        thread_id = frame.thread_id or payload.get("thread_id")
+        if not isinstance(thread_id, str) or not thread_id.strip():
+            thread_id = None
+        message_ids = payload.get("message_ids")
+        if not isinstance(message_ids, list):
+            message_ids = [payload.get("message_id")] if payload.get("message_id") else []
+        message_ids = [m for m in message_ids if isinstance(m, str) and m.strip()]
+        if not message_ids:
+            await self._ws_server.send_to(
+                device_id,
+                protocol.error(protocol.ERR_UNSUPPORTED, "message.delete requires message_ids", id=frame.id),
+            )
+            return
+        removed = 0
+        for mid in message_ids:
+            removed += self._outbox.delete_message(chat_id, mid, thread_id=thread_id)
+        logger.info(
+            "android: message.delete from %s chat_id=%r thread_id=%r ids=%s removed=%s",
+            device_id, chat_id, thread_id, message_ids, removed,
+        )
+        resp = protocol.message_deleted(chat_id, message_ids, thread_id=thread_id)
+        resp.id = frame.id
+        await self._broadcast_or_log(chat_id, resp)
+
     # ── M5: push token registration ───────────────────────────────────────
 
     async def on_fcm_register(self, frame: protocol.Frame, device_id: str) -> None: