refactor: 时间选择逻辑下沉至 Dialog、Worker 模板方法抽象、配置访问安全化与代码风格统一

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/pages/flows/_helpers.py

@@ -7,16 +7,13 @@ This software is provided "as is", without any warranty of any kind.
 You may use, modify, and distribute this file under the terms of the MIT License.
 See the LICENSE file for details.
 """
-def timeStrToMins(
-    time_str: str,
-) -> int:
+from pages.strategies.TimeSelectMaker import (
+    minsToTimeStr,
+    timeStrToMins
+)
 
-    hour, minute = map(int, time_str.split(":"))
-    return hour * 60 + minute
 
-def minsToTimeStr(
-    mins: int,
-) -> str:
-
-    hour, minute = divmod(int(mins), 60)
-    return f"{hour:02d}:{minute:02d}"
+__all__ = [
+    "minsToTimeStr",
+    "timeStrToMins",
+]