refactor(pages): 引入 Page Object 模式重构全部页面模块，变量统一为 snake_case

将原始 Selenium 操作脚本重构为三层 Page Object 架构：
- Page Objects（LoginPage/ReserveView/RecordsView/MainShell）
- Component Objects（Overlay 基类 + SeatMapOverlay/ReserveResultDialog 等对话框）
- Flow 状态机（ReserveFlow/CheckinFlow/RenewFlow）
- Services（CaptchaHandler/ReserveValidator/RecordChecker）

变量命名统一为 snake_case，方法名保持 camelCase，类名保持 PascalCase。

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

src/pages/services/__init__.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+"""
+Copyright (c) 2026 KenanZhu.
+All rights reserved.
+
+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.services.CaptchaHandler import CaptchaHandler
+from pages.services.ReserveValidator import ReserveValidator
+from pages.services.RecordChecker import RecordChecker
+
+__all__ = [
+    "CaptchaHandler",
+    "ReserveValidator",
+    "RecordChecker",
+]