feat(alipay): add Alipay life account video uploader

- New uploader/alipay_uploader module: QR-code cookie login, upload page
  flow, title/desc/tags fill, thumbnail, collection and publish
- sau_cli: add 'alipay login/check/upload-video' subcommands
- examples: get_alipay_cookie.py and test_alipay_upload.py
- utils/log.py: register alipay logger
- utils/login_qrcode.py: robust QR decode on non-ASCII Windows paths
  (numpy imdecode with cv2.imread fallback)

examples/test_alipay_upload.py

@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+"""测试支付宝生活号上传：使用已保存的 cookie 上传并发布一个视频。"""
+import asyncio
+import sys
+from datetime import datetime
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
+
+from uploader.alipay_uploader.main import AlipayVideo
+
+
+async def main():
+    base = Path(__file__).resolve().parents[1]
+    video_path = Path(r"D:\video-moving\assets\outro\outro_horizontal.mp4")
+    account_file = base / "cookies" / "alipay_uploader" / "account.json"
+
+    app = AlipayVideo(
+        title="测试发布标题",
+        file_path=str(video_path),
+        tags=["测试", "自动化"],
+        account_file=str(account_file),
+        desc="测试描述",
+        thumbnail_path=r"C:\Users\admin\Downloads\ScreenShot_2026-08-04_170159_630.png",
+        collection_name="",
+        headless=False,
+    )
+    await app.main()
+
+
+if __name__ == "__main__":
+    asyncio.run(main())