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/web/mini_program/test_smoke.py

@@ -0,0 +1,43 @@
+"""小程序冒烟测试 — 通过 miniprogram-automator 驱动。
+
+用法:
+    pytest tests/web/mini_program/ -m p0
+"""
+
+import pytest
+
+pytestmark = [pytest.mark.mini_program]
+
+
+class TestMiniProgramSmoke:
+    """小程序启动 + 基础页面验证。"""
+
+    @pytest.mark.p0
+    @pytest.mark.smoke
+    def test_mini_program_launches(self, run_mini_action):
+        """验证小程序能正常启动并展示首页。"""
+        result = run_mini_action("smoke")
+        assert result["ok"], f"小程序启动失败: {result.get('message')}"
+
+    @pytest.mark.p0
+    @pytest.mark.smoke
+    def test_navigate_to_pages(self, run_mini_action):
+        """验证关键页面可正常导航。"""
+        pages = ["/pages/order/index", "/pages/mine/index"]
+        for p in pages:
+            result = run_mini_action("navigate", page=p)
+            assert result["ok"], f"导航到 {p} 失败: {result.get('message')}"
+
+
+class TestMiniProgramElements:
+    """关键元素验证。"""
+
+    @pytest.mark.p1
+    @pytest.mark.parametrize("selector,label", [
+        pytest.param(".order-entry", "运单入口", id="order_entry"),
+        pytest.param(".mine-tab", "我的tab", id="mine_tab"),
+    ])
+    def test_key_element_exists(self, run_mini_action, selector, label):
+        """验证关键 UI 元素存在。"""
+        result = run_mini_action("element", element_action="exists", selector=selector)
+        assert result["ok"], f"{label} ({selector}) 不存在: {result.get('message')}"