fix: 修复 config_flow.py 类型注解错误

- 将 dict[str, any] 改为 dict[str, Any]
- 添加 typing.Any 导入

这会导致 500 Internal Server Error

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

custom_components/sigmesh_gateway/config_flow.py

@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+from typing import Any
+
 import voluptuous as vol
 from homeassistant import config_entries
 from homeassistant.core import callback
@@ -22,7 +24,7 @@ class SigMeshGatewayConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
     VERSION = 1
 
     async def async_step_user(
-        self, user_input: dict[str, any] | None = None
+        self, user_input: dict[str, Any] | None = None
     ) -> FlowResult:
         """处理用户配置步骤."""
         errors = {}
@@ -79,7 +81,7 @@ class SigMeshGatewayOptionsFlow(config_entries.OptionsFlow):
         """初始化选项流程."""
         self.config_entry = config_entry
 
-    async def async_step_init(self, user_input: dict[str, any] | None = None) -> FlowResult:
+    async def async_step_init(self, user_input: dict[str, Any] | None = None) -> FlowResult:
         """管理选项."""
         if user_input is not None:
             return self.async_create_entry(title="", data=user_input)