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)

utils/login_qrcode.py

@@ -5,6 +5,7 @@ from pathlib import Path
 import sys
 
 import cv2
+import numpy as np
 import segno
 
 
@@ -35,13 +36,16 @@ def remove_qrcode_file(qrcode_path: Path | None) -> bool:
 
 
 def decode_qrcode_from_path(qrcode_path: Path) -> str | None:
-    # Windows 下 cv2.imread 不支持中文路径, 改用 np.fromfile + imdecode
-    import numpy as np
-
+    # Windows 下 cv2.imread 对中文路径不稳定，优先走 numpy+imdecode
+    image = None
     try:
-        image = cv2.imdecode(np.fromfile(str(qrcode_path), dtype=np.uint8), cv2.IMREAD_COLOR)
+        data = np.fromfile(str(qrcode_path), dtype=np.uint8)
+        if data.size > 0:
+            image = cv2.imdecode(data, cv2.IMREAD_COLOR)
     except Exception:
-        return None
+        image = None
+    if image is None:
+        image = cv2.imread(str(qrcode_path))
     if image is None:
         return None