feat: add prompt-first batches and pausable task guidance

tests/unit/mcp/test_mcp_tools.py

@@ -279,6 +279,45 @@ def test_mobile_manage_task_unknown_trace(temp_trace_env):
     assert "not found" in res["message"]
 
 
+def test_web_task_can_be_paused_and_guided_from_mcp(temp_trace_env, monkeypatch):
+    import sqlite3
+    from pathlib import Path
+
+    import artemis.runtime.task_control as control
+
+    monkeypatch.setattr(control, "TRACES_PATH", Path(temp_trace_env))
+    monkeypatch.setattr("mcp_server.tools.task_manager._pid_alive", lambda pid: True)
+    trace_id = str(uuid.uuid4())
+    db = Path(temp_trace_env) / "data_engine.db"
+    with sqlite3.connect(db) as conn:
+        conn.execute(
+            "CREATE TABLE sessions (session_id TEXT, status TEXT, pid INTEGER, "
+            "start_time REAL, end_time REAL, device_info TEXT)"
+        )
+        conn.execute(
+            "INSERT INTO sessions VALUES (?, 'running', 17, 1, NULL, ?)",
+            (trace_id, '{"device_id":"test-device"}'),
+        )
+
+    assert (
+        mobile_manage_task(action="status", trace_id=trace_id)["device_serial"] == "test-device"
+    )
+    assert mobile_manage_task(action="pause", trace_id=trace_id)["status"] == "pausing"
+    assert (Path(temp_trace_env) / trace_id / "pause.request").exists()
+    control._write_atomic(
+        control.control_dir(trace_id) / "task_control_state.json", {"status": "task_paused"}
+    )
+    guided = mobile_manage_task(
+        action="inject_instruction", trace_id=trace_id, instruction="先确认当前画面"
+    )
+    assert guided["status"] == "task_paused"
+    assert (Path(temp_trace_env) / trace_id / "resume.request").exists()
+    assert (
+        control.consume_instructions(control.control_dir(trace_id))["instruction"]
+        == "先确认当前画面"
+    )
+
+
 def test_mobile_manage_task_status_and_stop(temp_trace_env):
     trace_id = str(uuid.uuid4())
     trace_store.init_trace(trace_id, "Test task", "Flash", "conv-1", device_serial="device-xyz")