feat: 新增工具插件、系统日志、workflow配置及前端优化

1. 新增工具插件(edit_file, python_executor, search_file, shell_executor, write_file)
2. 新增系统事件日志模块和API
3. 新增workflow配置文件和详情API
4. 前端增加SSE、错误边界、设置引导等组件
5. 优化认证加密、速率限制、配置加载等工具模块
6. 删除废弃的cluster和health API
7. 补充单元测试和集成测试

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/unit/test_utils_ray_hook.py

@@ -44,3 +44,64 @@ def test_ray_actor_hook_unknown_actor_raises(fake_actors):
 
     with pytest.raises(ValueError):
         ray_actor_hook("does_not_exist")
+
+
+def test_wait_for_actor_returns_immediately_when_ready(fake_actors):
+    """actor 已就绪时 wait_for_actor 立刻返回，不进入轮询等待。"""
+    handle = MagicMock()
+    fake_actors.register("postgres_database", handle)
+
+    from kilostar.utils.ray_hook import wait_for_actor
+
+    got = wait_for_actor("postgres_database", timeout=5.0)
+    assert got is handle
+
+
+def test_wait_for_actor_times_out_with_clear_error(fake_actors):
+    """超时仍未就绪时抛 TimeoutError，并在 message 里带 actor 名。"""
+    from kilostar.utils.ray_hook import wait_for_actor
+
+    with pytest.raises(TimeoutError) as exc_info:
+        wait_for_actor("never_ready", timeout=0.2, interval=0.05)
+    assert "never_ready" in str(exc_info.value)
+
+
+def test_wait_for_actor_succeeds_after_delayed_registration(fake_actors):
+    """actor 在第 N 次轮询时才注册，wait_for_actor 应在它就绪后返回。"""
+    from kilostar.utils.ray_hook import wait_for_actor
+
+    handle = MagicMock()
+    calls = {"n": 0}
+    original_get = fake_actors.get
+
+    def delayed_get(name, namespace="kilostar"):
+        calls["n"] += 1
+        if calls["n"] >= 3:
+            return handle
+        raise ValueError("not ready yet")
+
+    fake_actors.get = delayed_get
+    try:
+        got = wait_for_actor("late_actor", timeout=2.0, interval=0.05)
+        assert got is handle
+        assert calls["n"] >= 3
+    finally:
+        fake_actors.get = original_get
+
+
+def test_ray_actor_hook_with_timeout_waits(fake_actors):
+    """ray_actor_hook(timeout>0) 会走 wait_for_actor 等待路径。"""
+    from kilostar.utils.ray_hook import ray_actor_hook
+
+    handle = MagicMock()
+    calls = {"n": 0}
+
+    def delayed_get(name, namespace="kilostar"):
+        calls["n"] += 1
+        if calls["n"] >= 2:
+            return handle
+        raise ValueError("not ready yet")
+
+    fake_actors.get = delayed_get
+    actors = ray_actor_hook("slow_actor", timeout=2.0, interval=0.05)
+    assert actors.slow_actor is handle