feat: add multi-device concurrency, server lifecycle CLI, and unified execution stream

- Implement DevicePool and DeviceExecutionLock concurrency modes (per-device FIFO vs global serialization)
- Extend ArtemisClient SDK and CLI with explicit device targeting and concurrency strategy configuration
- Add server lifecycle management (artemis restart, stop, status) with cross-platform PID discovery
- Update MCP server tools to support multi-device dispatch, trace tagging, and per-device execution
- Enhance Showcase UI with step-by-step visual replay, playback speed controls, and device serial badges
- Add comprehensive unit test coverage and edge-case verification scripts

apps/admin_console/services/task_preset_catalog.py

@@ -334,12 +334,12 @@ PRESET_TASK_CATALOG: list[TaskPreset] = [
         required_packages=["com.google.android.apps.photos"],
         priority=82,
     ),
-    # 9. WeChat (微信)
+    # 9. WeChat
     TaskPreset(
         id="wechat_browse",
         title="Check WeChat Messages",
         description="Open WeChat and view top recent chat conversations",
-        goal="Open WeChat (微信) and view the top recent chat messages.",
+        goal="Open WeChat and view the top recent chat messages.",
         profile="flash",
         category="flash",
         tag="WeChat",
@@ -351,7 +351,7 @@ PRESET_TASK_CATALOG: list[TaskPreset] = [
         id="pro_wechat_to_calendar",
         title="WeChat Notice to Calendar",
         description="Extract meeting notice from WeChat chat and add to Calendar",
-        goal="Open WeChat (微信), locate the latest meeting announcement or event message in the top chat, extract the time and topic, then open Calendar and schedule an event.",
+        goal="Open WeChat, locate the latest meeting announcement or event message in the top chat, extract the time and topic, then open Calendar and schedule an event.",
         profile="pro",
         category="cross_app",
         tag="WeChat + Calendar",
@@ -367,12 +367,12 @@ PRESET_TASK_CATALOG: list[TaskPreset] = [
         required_packages=["com.tencent.mm"],
         priority=93,
     ),
-    # 10. Xiaohongshu (小红书)
+    # 10. Xiaohongshu
     TaskPreset(
         id="xhs_coffee_guide",
         title="RED Cafe Guide Search",
         description="Search trending specialty cafe reviews on Xiaohongshu",
-        goal="Open Xiaohongshu (小红书), search for top-rated specialty coffee shops, and view the top post.",
+        goal="Open Xiaohongshu, search for top-rated specialty coffee shops, and view the top post.",
         profile="flash",
         category="flash",
         tag="Xiaohongshu",
@@ -384,12 +384,12 @@ PRESET_TASK_CATALOG: list[TaskPreset] = [
         required_packages=["com.xingin.xhs"],
         priority=87,
     ),
-    # 11. Meituan / Dianping (美团 / 大众点评)
+    # 11. Meituan / Dianping
     TaskPreset(
         id="meituan_ramen_search",
         title="Meituan Food Search",
         description="Search top-rated Ramen nearby on Meituan or Dianping",
-        goal="Open Meituan (美团) or Dianping (大众点评), search for top-rated Ramen nearby, and view top restaurant rating.",
+        goal="Open Meituan or Dianping, search for top-rated Ramen nearby, and view top restaurant rating.",
         profile="flash",
         category="flash",
         tag="Meituan",
@@ -401,12 +401,12 @@ PRESET_TASK_CATALOG: list[TaskPreset] = [
         required_packages=["com.sankuai.meituan", "com.dianping.v1"],
         priority=86,
     ),
-    # 12. Bilibili (哔哩哔哩)
+    # 12. Bilibili
     TaskPreset(
         id="bilibili_stream",
         title="Bilibili Tech Video",
         description="Search and play an AI Agent tutorial video on Bilibili",
-        goal='Open Bilibili (哔哩哔哩), search for "AI Agent 架构实战", and play the top matching video.',
+        goal='Open Bilibili, search for "AI Agent Architecture", and play the top matching video.',
         profile="flash",
         category="flash",
         tag="Bilibili",

apps/admin_console/services/task_queue_service.py

@@ -241,6 +241,11 @@ class TaskQueueService:
     async def queue_worker(cls):
         """Persistent, self-healing background worker loop processing tasks in FIFO order."""
         print("[QueueWorker] Background worker loop initialized and running.")
+        try:
+            DeviceExecutionLock.cleanup_stale_locks()
+        except Exception as exc:
+            print(f"[QueueWorker] Initial stale lock cleanup notice: {exc}")
+
         while True:
             task_item = None
             sess_id = None
@@ -289,6 +294,7 @@ class TaskQueueService:
                         "session_id": sess_id,
                         "initial_goal": goal,
                         "profile": profile,
+                        "device_serial": task_item.get("device_serial"),
                     },
                 )
 
@@ -322,6 +328,8 @@ class TaskQueueService:
                     "--test-name",
                     test_name,
                 ]
+                if sess_id:
+                    cmd.extend(["--session-id", str(sess_id)])
                 if expected_output:
                     cmd.extend(["--output-description", str(expected_output)])
                 if enable_outputter is not None:
@@ -330,9 +338,13 @@ class TaskQueueService:
                     cmd.extend(["--locked-app", str(locked_app)])
                 if app_path:
                     cmd.extend(["--app-path", str(app_path)])
+                device_serial = task_item.get("device_serial")
+                if device_serial:
+                    cmd.extend(["--device-serial", str(device_serial)])
+                    env["ADB_DEVICE_SERIAL"] = str(device_serial)
 
                 print(
-                    f"[QueueWorker] Starting task [{sess_id}]: '{goal}' (profile: {profile}, outputter: {bool(expected_output or enable_outputter)})"
+                    f"[QueueWorker] Starting task [{sess_id}]: '{goal}' (profile: {profile}, device: {device_serial or 'auto'}, outputter: {bool(expected_output or enable_outputter)})"
                 )
                 proc = await asyncio.create_subprocess_exec(
                     *cmd,
@@ -349,6 +361,7 @@ class TaskQueueService:
                     str(queue_ticket),
                     proc.pid,
                     description=f"frontend task: {goal[:120]}",
+                    device_id=device_serial or "pending",
                     session_id=str(sess_id) if sess_id else None,
                     ingress="frontend",
                 )
@@ -453,6 +466,7 @@ class TaskQueueService:
         enable_outputter: bool | None = None,
         locked_app_package: str | None = None,
         app_path: str | None = None,
+        device_serial: str | None = None,
     ) -> dict[str, Any]:
         """Enqueues one or more goals and wakes up the background worker."""
         cls.ensure_worker_running()
@@ -461,8 +475,18 @@ class TaskQueueService:
         now = time.time()
         for i, goal in enumerate(goals):
             sess_id = str(uuid.uuid4())
+            assigned_serial = device_serial
+            if not assigned_serial:
+                try:
+                    from artemis.runtime import device_pool
+
+                    assigned_serial = device_pool.select_device()
+                except Exception:
+                    assigned_serial = None
+
             queue_ticket = DeviceExecutionLock.reserve(
                 description=f"frontend task: {goal[:120]}",
+                device_id=assigned_serial or "pending",
                 session_id=sess_id,
                 ingress="frontend",
             )
@@ -474,6 +498,7 @@ class TaskQueueService:
                 "enable_outputter": enable_outputter,
                 "locked_app_package": locked_app_package,
                 "app_path": app_path,
+                "device_serial": assigned_serial,
                 "status": "pending",
                 "queue_ticket": queue_ticket,
                 "created_at": now + i * 0.001,