feat(auth): separate read and write bilibili accounts

tests/test_folder_sync.py

@@ -74,9 +74,10 @@ class FakeFavTransport:
 
 def write_config(tmp, folders):
     data = {
-        "mid": 28802351,
-        "csrf": "csrf-secret",
-        "cookie": "SESSDATA=secret; bili_jct=csrf-secret; buvid3=device",
+        "bilibili": {
+            "read": {"mid": 28802351, "csrf": "csrf-secret", "cookie": "SESSDATA=secret; bili_jct=csrf-secret; buvid3=device"},
+            "write": {"mid": 2, "csrf": "write-csrf", "cookie": "write-cookie"},
+        },
         "storage": {
             "database_path": str(Path(tmp) / "app.db"),
             "backup_dir": str(Path(tmp) / "backup"),