feat: 添加日历批量操作与客户端时区感知功能，优化前端 UI 交互体验

backend/src/schemas/agent/__init__.py

@@ -1,3 +1,7 @@
+from schemas.agent.forwarded_props import (
+    ClientTimeContext,
+    parse_forwarded_props_client_time,
+)
 from schemas.agent.runtime_models import (
     ResultType,
     RouterAgentOutput,
@@ -22,6 +26,7 @@ from schemas.agent.ui_hints import (
 
 __all__ = [
     "AgentType",
+    "ClientTimeContext",
     "ResultType",
     "RouterAgentOutput",
     "RouterUiDecision",
@@ -39,4 +44,5 @@ __all__ = [
     "WorkerAgentOutputRich",
     "WorkerAgentOutput",
     "resolve_worker_output_model",
+    "parse_forwarded_props_client_time",
 ]