refactor(schemas): 统一 message/notification 命名边界，旧名收敛至兼容映射表

- notification 域：渠道能力（MessageChannel→NotificationChannel、ChannelCapability* 迁入 notification.py）
- message 域：消息收发（Notification→Message、NotificationType→MessageType、CommingMessage→IncomingMessage、NotificationHistoryItem→MessageHistoryItem、NotificationClear*→MessageClear*）
- Agent 工具契约：send_notification_message→send_message、notification_callback→message_callback
- 源码不保留旧名物理别名，旧导入经 app/runtime/compat/manifest.py SYMBOL_ALIASES 惰性解析
- API 路径与持久化键冻结不变，前端零改动
- 新增兼容守护测试与 docs/rules/07 命名边界规范

tests/test_agent_message_routing.py

@@ -15,7 +15,7 @@ from app.db.models.message import Message
 from app.application.messaging.agent import AgentInteractionOption, agent_interaction_manager
 from app.application.messaging.interaction import InteractionContext
 from app.application.messaging.media import media_interaction_manager
-from app.schemas.types import MessageChannel, NotificationType
+from app.schemas.types import NotificationChannel, MessageType
 
 
 def _clear_messages() -> None:
@@ -31,7 +31,7 @@ def test_explicit_ai_message_bypasses_pending_media_interaction():
     media_interaction_manager.clear()
     media_interaction_manager.create_or_replace(
         user_id="10001",
-        channel=MessageChannel.Wechat,
+        channel=NotificationChannel.Wechat,
         source="wechat-test",
         username="tester",
         action="Search",
@@ -47,7 +47,7 @@ def test_explicit_ai_message_bypasses_pending_media_interaction():
             chain, "_handle_ai_message", return_value=True
         ) as handle_ai_message:
             chain.handle_message(
-                channel=MessageChannel.Wechat,
+                channel=NotificationChannel.Wechat,
                 source="wechat-test",
                 userid="10001",
                 username="tester",
@@ -74,7 +74,7 @@ def test_explicit_ai_message_is_not_recorded_to_message_history():
         side_effect=lambda coro, _loop: (coro.close(), Mock())[1],
     ):
         chain.handle_message(
-            channel=MessageChannel.Telegram,
+            channel=NotificationChannel.Telegram,
             source="telegram-test",
             userid="10001",
             username="tester",
@@ -97,7 +97,7 @@ def test_message_chain_passes_stable_channel_admin_principal_to_agent():
         side_effect=lambda coro, _loop: (coro.close(), Mock())[1],
     ):
         chain.handle_message(
-            channel=MessageChannel.Telegram,
+            channel=NotificationChannel.Telegram,
             source="telegram-test",
             userid="10001",
             username="renamed-user",
@@ -120,7 +120,7 @@ def test_message_chain_does_not_trust_channel_display_username():
         side_effect=lambda coro, _loop: (coro.close(), Mock())[1],
     ):
         chain.handle_message(
-            channel=MessageChannel.Telegram,
+            channel=NotificationChannel.Telegram,
             source="telegram-test",
             userid="10002",
             username="admin",
@@ -143,7 +143,7 @@ def test_message_chain_uses_same_admin_contract_for_slack():
         side_effect=lambda coro, _loop: (coro.close(), Mock())[1],
     ):
         chain.handle_message(
-            channel=MessageChannel.Slack,
+            channel=NotificationChannel.Slack,
             source="slack-test",
             userid="UADMIN",
             username="renamed-user",
@@ -159,7 +159,7 @@ def test_ask_user_choice_message_is_not_recorded_to_message_history():
     _clear_messages()
     tool = AskUserChoiceTool(session_id="session-choice", user_id="10001")
     tool.set_message_attr(
-        channel=MessageChannel.Telegram.value,
+        channel=NotificationChannel.Telegram.value,
         source="telegram-test",
         username="tester",
     )
@@ -198,7 +198,7 @@ def test_agent_final_reply_disables_notification_history():
     agent = MoviePilotAgent(
         session_id="session-agent-reply",
         user_id="10001",
-        channel=MessageChannel.Telegram.value,
+        channel=NotificationChannel.Telegram.value,
         source="telegram-test",
         username="tester",
     )
@@ -210,7 +210,7 @@ def test_agent_final_reply_disables_notification_history():
         asyncio.run(agent.send_agent_message("已完成处理"))
 
     notification = async_post_message.await_args.args[0]
-    assert notification.mtype == NotificationType.Agent
+    assert notification.mtype == MessageType.Agent
     assert notification.save_history is False
 
 
@@ -218,7 +218,7 @@ def test_send_message_tool_disables_notification_history():
     """Agent 主动发消息工具发送的通知不保存通知历史。"""
     tool = SendMessageTool(session_id="session-send-message", user_id="10001")
     tool.set_message_attr(
-        channel=MessageChannel.Telegram.value,
+        channel=NotificationChannel.Telegram.value,
         source="telegram-test",
         username="tester",
     )
@@ -242,7 +242,7 @@ def test_agent_choice_callback_is_not_recorded_to_message_history():
     request = agent_interaction_manager.create_request(
         session_id="session-choice",
         user_id="10001",
-        channel=MessageChannel.Telegram.value,
+        channel=NotificationChannel.Telegram.value,
         source="telegram-test",
         username="tester",
         title="需要你的选择",
@@ -268,7 +268,7 @@ def test_agent_choice_callback_is_not_recorded_to_message_history():
             chain._handle_callback(
                 callback_data=f"agent_interaction:choice:{request.request_id}:1",
                 context=InteractionContext(
-                    channel=MessageChannel.Telegram,
+                    channel=NotificationChannel.Telegram,
                     source="telegram-test",
                     user_id="10001",
                     username="tester",