refactor(pages): 抽取时间选择策略为 TimeSelectMaker，将 Overlay 基类更名为 Dialog

将 findBestTimeOption 中的预约/续约双分支逻辑抽象为策略模式：
- TimeOptionReader 负责从 WebElement 提取时间数据（ReserveTimeReader / RenewTimeReader）
- TimeDecisionMaker 执行纯决策算法，零 Selenium 依赖
- TimeSelectMaker 作为工厂统一创建配置好的决策器
- 共享常量 LIBRARY_CLOSE_MINS 统一收敛至 TimeSelectMaker

同时将 Overlay 基类重命名为 Dialog，SeatMapOverlay 同步更名为 SeatMapDialog，保持命名一致性。

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

src/pages/components/CheckinResultDialog.py

@@ -16,10 +16,10 @@ from selenium.common.exceptions import (
 from selenium.webdriver.common.by import By
 from selenium.webdriver.remote.webdriver import WebDriver
 
-from pages.components.Overlay import Overlay
+from pages.components.Dialog import Dialog
 
 
-class CheckinResultDialog(Overlay):
+class CheckinResultDialog(Dialog):
     """
         Check-in result dialog.
     """

src/pages/components/Dialog.py

@@ -13,7 +13,7 @@ from selenium.webdriver.support.ui import WebDriverWait
 from selenium.webdriver.support import expected_conditions as EC
 
 
-class Overlay:
+class Dialog:
     """
         Context-managed overlay / modal / dialog on a page.
 
@@ -36,7 +36,7 @@ class Overlay:
 
     def __enter__(
         self,
-    ) -> "Overlay":
+    ) -> "Dialog":
 
         WebDriverWait(self._driver, self._timeout).until(
             EC.visibility_of_element_located(self._root_locator)

src/pages/components/RenewDialog.py

@@ -16,10 +16,10 @@ from selenium.webdriver.common.by import By
 from selenium.webdriver.remote.webdriver import WebDriver
 from selenium.webdriver.remote.webelement import WebElement
 
-from pages.components.Overlay import Overlay
+from pages.components.Dialog import Dialog
 
 
-class RenewDialog(Overlay):
+class RenewDialog(Dialog):
     """
         Renewal time selection dialog.
     """

src/pages/components/ReserveResultDialog.py

@@ -14,10 +14,10 @@ from selenium.common.exceptions import (
 from selenium.webdriver.common.by import By
 from selenium.webdriver.remote.webdriver import WebDriver
 
-from pages.components.Overlay import Overlay
+from pages.components.Dialog import Dialog
 
 
-class ReserveResultDialog(Overlay):
+class ReserveResultDialog(Dialog):
     """
         Reservation result dialog shown after submitting a reserve request.
     """

src/pages/components/SeatMapDialog.py

@@ -18,10 +18,10 @@ from selenium.webdriver.remote.webdriver import WebDriver
 from selenium.webdriver.support.ui import WebDriverWait
 from selenium.webdriver.support import expected_conditions as EC
 
-from pages.components.Overlay import Overlay
+from pages.components.Dialog import Dialog
 
 
-class SeatMapOverlay(Overlay):
+class SeatMapDialog(Dialog):
     """
         Seat selection overlay that opens after choosing a floor and room.
     """

src/pages/components/TimeSelectDialog.py

@@ -15,10 +15,10 @@ from selenium.webdriver.common.by import By
 from selenium.webdriver.remote.webdriver import WebDriver
 from selenium.webdriver.remote.webelement import WebElement
 
-from pages.components.Overlay import Overlay
+from pages.components.Dialog import Dialog
 
 
-class TimeSelectDialog(Overlay):
+class TimeSelectDialog(Dialog):
     """
         Time selection panel that appears after selecting a seat.
 

src/pages/components/__init__.py

@@ -7,14 +7,14 @@ 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.
 """
-from pages.components.SeatMapOverlay import SeatMapOverlay
+from pages.components.SeatMapDialog import SeatMapDialog
 from pages.components.TimeSelectDialog import TimeSelectDialog
 from pages.components.ReserveResultDialog import ReserveResultDialog
 from pages.components.CheckinResultDialog import CheckinResultDialog
 from pages.components.RenewDialog import RenewDialog
 
 __all__ = [
-    "SeatMapOverlay",
+    "SeatMapDialog",
     "TimeSelectDialog",
     "ReserveResultDialog",
     "CheckinResultDialog",