Improve replayed run status handling

tests/test_gui_server.py

@@ -16,7 +16,12 @@ from pathlib import Path
 
 from fastapi.testclient import TestClient
 
-from backend.api.server import AgentState, create_app
+from backend.api.server import (
+    AgentState,
+    create_app,
+    _runtime_event_stage,
+    _sanitize_stored_session_for_resume,
+)
 from src.agent_types import AgentRunResult
 from src.session_store import StoredAgentSession, load_agent_session, save_agent_session
 
@@ -360,6 +365,52 @@ class GuiServerTests(unittest.TestCase):
             self.assertEqual(response.status_code, 200)
             self.assertEqual(response.json()['status'], 'interrupted')
 
+    def test_resume_sanitizer_removes_ui_run_status_messages(self) -> None:
+        stored = StoredAgentSession(
+            session_id='thread-1',
+            model_config={'model': 'test-model'},
+            runtime_config={},
+            system_prompt_parts=('system prompt',),
+            user_context={},
+            system_context={},
+            messages=(
+                {'role': 'user', 'content': 'hello'},
+                {
+                    'role': 'assistant',
+                    'content': '上一次任务已中断，后台没有正在执行的进程。',
+                    'state': 'final',
+                    'stop_reason': 'interrupted',
+                    'metadata': {'kind': 'run_status', 'status': 'interrupted'},
+                },
+                {'role': 'user', 'content': 'continue'},
+            ),
+            turns=1,
+            tool_calls=0,
+            usage={},
+            total_cost_usd=0.0,
+            file_history=(),
+            budget_state={'status': 'interrupted'},
+            plugin_state={},
+        )
+
+        sanitized = _sanitize_stored_session_for_resume(stored)
+
+        self.assertEqual(
+            [message['content'] for message in sanitized.messages],
+            ['hello', 'continue'],
+        )
+
+    def test_runtime_event_stage_names_long_running_work(self) -> None:
+        self.assertEqual(
+            _runtime_event_stage({'type': 'tool_start', 'tool_name': 'python_exec'}),
+            '调用工具 python_exec',
+        )
+        self.assertEqual(
+            _runtime_event_stage({'type': 'final_text_start'}),
+            '正在整理回复',
+        )
+        self.assertEqual(_runtime_event_stage({'type': 'server_heartbeat'}), '')
+
     def test_chat_uses_account_scoped_model_config(self) -> None:
         with tempfile.TemporaryDirectory() as d:
             client, _ = _build_client(Path(d))