fix: count only absolute path lines in _count_downloaded_files

backend/app/services/gallery_dl.py

@@ -542,19 +542,15 @@ class GalleryDLService:
     def _count_downloaded_files(self, stdout: str) -> int:
         """Count the number of files downloaded from stdout.
 
-        Gallery-dl outputs one line per downloaded file.
-        Lines starting with '#' or containing 'skip' are not downloads.
+        Gallery-dl writes each downloaded file path to stdout as an absolute path
+        (starting with '/'). Log lines contain '[' prefixes; verbose HTTP lines
+        go to stderr. Counting only lines starting with '/' avoids over-counting
+        log and progress output.
         """
         if not stdout:
             return 0
 
-        count = 0
-        for line in stdout.strip().split("\n"):
-            line = line.strip()
-            if line and not line.startswith("#") and "skip" not in line.lower():
-                count += 1
-
-        return count
+        return sum(1 for line in stdout.splitlines() if line.strip().startswith("/"))
 
     async def download(
         self,