test(gateway): cover photo burst interrupt regressions

Add regression coverage for non-album Telegram photo burst batching, photo follow-ups that should queue without interrupting active runs, and the gateway priority-interrupt path for photo events.

tests/gateway/test_interrupt_key_match.py

@@ -11,7 +11,7 @@ import asyncio
 import pytest
 
 from gateway.config import Platform, PlatformConfig
-from gateway.platforms.base import BasePlatformAdapter, MessageEvent, SendResult
+from gateway.platforms.base import BasePlatformAdapter, MessageEvent, MessageType, SendResult
 from gateway.session import SessionSource, build_session_key
 
 
@@ -122,3 +122,29 @@ class TestInterruptKeyConsistency:
 
         # Interrupt event was set
         assert adapter._active_sessions[session_key].is_set()
+
+    @pytest.mark.asyncio
+    async def test_photo_followup_is_queued_without_interrupt(self):
+        """Photo follow-ups should queue behind the active run instead of interrupting it."""
+        adapter = StubAdapter()
+        adapter.set_message_handler(lambda event: asyncio.sleep(0, result=None))
+
+        source = _source("-1001234", "group")
+        session_key = build_session_key(source)
+        interrupt_event = asyncio.Event()
+        adapter._active_sessions[session_key] = interrupt_event
+
+        event = MessageEvent(
+            text="caption",
+            source=source,
+            message_type=MessageType.PHOTO,
+            message_id="2",
+            media_urls=["/tmp/photo-a.jpg"],
+            media_types=["image/jpeg"],
+        )
+        await adapter.handle_message(event)
+
+        queued = adapter._pending_messages[session_key]
+        assert queued is event
+        assert queued.media_urls == ["/tmp/photo-a.jpg"]
+        assert interrupt_event.is_set() is False

tests/gateway/test_telegram_documents.py

@@ -352,6 +352,26 @@ class TestDocumentDownloadBlock:
 # ---------------------------------------------------------------------------
 
 class TestMediaGroups:
+    @pytest.mark.asyncio
+    async def test_non_album_photo_burst_is_buffered_and_combined(self, adapter):
+        first_photo = _make_photo(_make_file_obj(b"first"))
+        second_photo = _make_photo(_make_file_obj(b"second"))
+
+        msg1 = _make_message(caption="two images", photo=[first_photo])
+        msg2 = _make_message(photo=[second_photo])
+
+        with patch("gateway.platforms.telegram.cache_image_from_bytes", side_effect=["/tmp/burst-one.jpg", "/tmp/burst-two.jpg"]):
+            await adapter._handle_media_message(_make_update(msg1), MagicMock())
+            await adapter._handle_media_message(_make_update(msg2), MagicMock())
+            assert adapter.handle_message.await_count == 0
+            await asyncio.sleep(adapter.MEDIA_GROUP_WAIT_SECONDS + 0.05)
+
+        adapter.handle_message.assert_awaited_once()
+        event = adapter.handle_message.await_args.args[0]
+        assert event.text == "two images"
+        assert event.media_urls == ["/tmp/burst-one.jpg", "/tmp/burst-two.jpg"]
+        assert len(event.media_types) == 2
+
     @pytest.mark.asyncio
     async def test_photo_album_is_buffered_and_combined(self, adapter):
         first_photo = _make_photo(_make_file_obj(b"first"))

tests/gateway/test_telegram_photo_interrupts.py

@@ -0,0 +1,49 @@
+import asyncio
+from unittest.mock import MagicMock
+
+import pytest
+
+from gateway.config import GatewayConfig, Platform, PlatformConfig
+from gateway.platforms.base import MessageEvent, MessageType
+from gateway.session import SessionSource, build_session_key
+from gateway.run import GatewayRunner
+
+
+class _PendingAdapter:
+    def __init__(self):
+        self._pending_messages = {}
+
+
+def _make_runner():
+    runner = object.__new__(GatewayRunner)
+    runner.config = GatewayConfig(platforms={Platform.TELEGRAM: PlatformConfig(enabled=True, token="***")})
+    runner.adapters = {Platform.TELEGRAM: _PendingAdapter()}
+    runner._running_agents = {}
+    runner._pending_messages = {}
+    runner._pending_approvals = {}
+    runner._voice_mode = {}
+    runner._is_user_authorized = lambda _source: True
+    return runner
+
+
+@pytest.mark.asyncio
+async def test_handle_message_does_not_priority_interrupt_photo_followup():
+    runner = _make_runner()
+    source = SessionSource(platform=Platform.TELEGRAM, chat_id="12345", chat_type="dm")
+    session_key = build_session_key(source)
+    running_agent = MagicMock()
+    runner._running_agents[session_key] = running_agent
+
+    event = MessageEvent(
+        text="caption",
+        message_type=MessageType.PHOTO,
+        source=source,
+        media_urls=["/tmp/photo-a.jpg"],
+        media_types=["image/jpeg"],
+    )
+
+    result = await runner._handle_message(event)
+
+    assert result is None
+    running_agent.interrupt.assert_not_called()
+    assert runner.adapters[Platform.TELEGRAM]._pending_messages[session_key] is event