Improve task resilience and LLM retry visibility

Persist and publish recoverable provider retries so temporary 503 and throttling events remain visible in live and historical task streams.

Aggregate repeated retries into an expandable action card, preserve terminal pause recovery, harden Windows worker isolation and output forwarding, and retain reliable Android hierarchy fallbacks with regression coverage.

tests/unit/admin_console/test_task_queue_service.py

@@ -14,6 +14,9 @@
 
 import asyncio
 import importlib
+import json
+import os
+import subprocess
 import sys
 from unittest.mock import AsyncMock, MagicMock, patch
 import pytest
@@ -203,9 +206,11 @@ async def test_queue_worker_cmd_construction():
         assert "--app-path" in cmd
         assert "/path/to/app.apk" in cmd
         if sys.platform == "win32":
-            import subprocess
-
-            assert executed_kwargs[0]["creationflags"] == subprocess.CREATE_NEW_PROCESS_GROUP
+            assert executed_kwargs[0]["creationflags"] == (
+                subprocess.CREATE_NEW_PROCESS_GROUP | subprocess.CREATE_NO_WINDOW
+            )
+            assert executed_kwargs[0]["stdout"] == asyncio.subprocess.PIPE
+            assert executed_kwargs[0]["stderr"] == asyncio.subprocess.STDOUT
         else:
             assert "creationflags" not in executed_kwargs[0]
 
@@ -218,6 +223,40 @@ async def test_queue_worker_cmd_construction():
                 pass
 
 
+@pytest.mark.asyncio
+async def test_forward_worker_output_preserves_split_utf8(capsys):
+    stream = asyncio.StreamReader()
+    encoded = "worker 输出正常\n".encode()
+    stream.feed_data(encoded[:9])
+    stream.feed_data(encoded[9:])
+    stream.feed_eof()
+
+    await TaskQueueService._forward_worker_output(stream)
+
+    assert capsys.readouterr().out == "worker 输出正常\n"
+
+
+@pytest.mark.skipif(sys.platform != "win32", reason="Windows console isolation only")
+def test_windows_worker_has_no_inherited_console():
+    probe = r"""
+import ctypes
+import json
+
+buffer = (ctypes.c_uint32 * 32)()
+count = ctypes.windll.kernel32.GetConsoleProcessList(buffer, len(buffer))
+print(json.dumps(list(buffer[:min(count, len(buffer))])))
+"""
+    result = subprocess.run(
+        [sys.executable, "-c", probe],
+        check=True,
+        text=True,
+        **TaskQueueService._subprocess_creation_kwargs(),
+    )
+
+    attached_processes = json.loads(result.stdout)
+    assert os.getpid() not in attached_processes
+
+
 @pytest.mark.asyncio
 async def test_stop_tasks_dead_process_resets_state():
     state.queue_items = [