correcting pixiv connection functionality

backend/app/services/gallery_dl.py

@@ -387,6 +387,8 @@ class GalleryDLService:
             "please login",
             "must be logged in",
             "authentication required",
+            "authenticationerror",
+            "refresh-token",  # Pixiv OAuth
             "session expired",
             "invalid cookie",
             "cookies are expired",
@@ -560,6 +562,12 @@ class GalleryDLService:
                 config["extractor"]["discord"] = {}
             config["extractor"]["discord"]["token"] = auth_token
 
+        # Add refresh token for Pixiv
+        if auth_token and platform == "pixiv":
+            if "pixiv" not in config["extractor"]:
+                config["extractor"]["pixiv"] = {}
+            config["extractor"]["pixiv"]["refresh-token"] = auth_token
+
         # Write temporary config file
         with tempfile.NamedTemporaryFile(
             mode="w",