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/core/db_helper.py

@@ -0,0 +1,75 @@
+"""MySQL 数据库操作工具 — 测试中的数据库校验/数据修改。
+
+连接配置在 tests/config/test_config.yaml 的 database 段维护。
+
+Usage:
+    from tests.core.db_helper import update_risk_control_status
+
+    affected = update_risk_control_status("RHJC040026071600021457570057", status=1)
+"""
+
+import pymysql
+
+from tests.core.config_loader import load_config
+
+
+def _resolve_config(config: dict | None) -> dict:
+    """显式传入优先，否则读 yaml 的 database 段。"""
+    if config is not None:
+        return config
+    cfg = dict(load_config()["database"])
+    cfg.setdefault("charset", "utf8mb4")
+    return cfg
+
+
+def get_connection(config: dict | None = None):
+    """获取数据库连接。"""
+    return pymysql.connect(**_resolve_config(config))
+
+
+def execute_sql(sql: str, params: tuple | None = None, config: dict | None = None) -> int:
+    """执行 SQL（INSERT/UPDATE/DELETE），返回影响行数。"""
+    conn = get_connection(config)
+    try:
+        with conn.cursor() as cursor:
+            affected = cursor.execute(sql, params)
+            conn.commit()
+            return affected
+    finally:
+        conn.close()
+
+
+def query_sql(sql: str, params: tuple | None = None, config: dict | None = None) -> list[dict]:
+    """执行查询 SQL，返回结果列表。"""
+    conn = get_connection(config)
+    try:
+        with conn.cursor(pymysql.cursors.DictCursor) as cursor:
+            cursor.execute(sql, params)
+            return cursor.fetchall()
+    finally:
+        conn.close()
+
+
+def update_risk_control_status(order_code: str, status: int = 1, config: dict | None = None) -> int:
+    """更新运单风控状态。
+
+    执行 SQL:
+        UPDATE tms_order_detail_ext SET risk_control_status = <status>
+        WHERE order_detail_code IN (
+            SELECT `code` FROM `tms_order_detail` WHERE order_code = '<order_code>'
+        )
+
+    Args:
+        order_code: 运输单号（对应 tms_order_detail.order_code）
+        status: 风控状态值，默认 1
+        config: 数据库连接配置（不传则读 yaml database 段）
+    Returns:
+        影响行数
+    """
+    sql = (
+        "UPDATE tms_order_detail_ext SET risk_control_status = %s "
+        "WHERE order_detail_code IN ("
+        "  SELECT `code` FROM `tms_order_detail` WHERE order_code = %s"
+        ")"
+    )
+    return execute_sql(sql, (status, order_code), config)