refactor(tests): restructure into layered POM architecture with Allure reporting

- Split framework into core/ (config, logger, db, driver factories, screenshot,
  allure integration) and pages/ (PO layer: base/admin/driver); flatten test
  files per platform (web/admin, app/driver_android, cross_end)
- Slim root conftest.py 656 -> ~100 lines: drop inline CN HTML report, add
  Allure severity mapping (p0/p1/p2 -> blocker/normal/minor) and
  environment.properties; support both tests.*-prefixed and bare imports
- Preserve TC-D2S-001/002 cross-end E2E cases with business logic unchanged,
  add allure epic/feature/story/step annotations
- Deduplicate: single makereport hook, shared failure-screenshot helpers,
  single SCREENSHOTS_DIR constant; deterministic auth-state role loading
- Move DB credentials from db_helper.py into test_config.yaml (database section)
- Move pytest.ini to repo root; switch reporting to allure-pytest
  (drop pytest-html/junitxml); update requirements.txt accordingly
- Delete deprecated scaffolding: test_freight_full_flow + 6 stale page
  objects, iOS/shipper empty shells, dead utils
- Fix flaky vxe-table action-row wait: wait for a visible td instead of
  hidden placeholder rows (fixed shipper-payment timeouts)
- Verified end-to-end against live env: both E2E cases pass (2 passed 3m12s);
  run artifacts (logs/screenshots/allure) included per repo convention

tests/pages/admin/navbar.py

@@ -0,0 +1,53 @@
+"""导航栏公共组件。
+
+跨页面复用的顶部/侧边导航操作。
+
+Usage:
+    from tests.pages.admin.navbar import NavBar
+
+    navbar = NavBar(page)
+    navbar.go_to("运输管理")
+"""
+
+from playwright.sync_api import Page, expect
+
+from tests.pages.base.web_base_page import BasePage
+
+
+class NavBar(BasePage):
+    """侧边导航栏组件。"""
+
+    def __init__(self, page: Page):
+        super().__init__(page)
+        # ⚠️ 以下定位器需要根据实际 DOM 调整
+        self.sidebar = page.locator(".ant-layout-sider")
+        self.logout_btn = page.get_by_text("退出登录")
+
+    def go_to(self, menu_name: str) -> None:
+        """点击侧边栏菜单项展开/跳转。
+
+        Args:
+            menu_name: 菜单名称文本（如 "运输管理"、"基础信息"）
+        """
+        menu_item = self.page.get_by_text(menu_name).first
+        self.click_when_ready(menu_item)
+
+    def go_to_submenu(self, parent_menu: str, sub_menu: str) -> None:
+        """点击父级菜单后，点击子菜单项。
+
+        Args:
+            parent_menu: 父级菜单文本（如 "整车运输"）
+            sub_menu: 子菜单文本（如 "运单管理"）
+        """
+        self.go_to(parent_menu)
+        sub_item = self.page.get_by_text(sub_menu).first
+        self.click_when_ready(sub_item)
+
+    def logout(self) -> None:
+        """退出登录。"""
+        self.click_when_ready(self.logout_btn)
+        expect(self.page).to_have_url("#/login", timeout=10_000)
+
+    def is_expanded(self) -> bool:
+        """检查侧边栏是否展开。"""
+        return self.sidebar.is_visible()