Update gallery default fixture

Co-authored-by: Cursor <cursoragent@cursor.com>

gallery.py

@@ -68,7 +68,7 @@ GALLERY_TOP_N = 10
 # what counts as medium/hard may drift with new models, but a stable,
 # simple comparison sheet is worth more here than a moving ground truth.
 FIXED_FIXTURES = [
-    {"id": "108", "task": "generation", "difficulty": "Medium"},
+    {"id": "101", "task": "generation", "difficulty": "Medium"},
     {"id": "111", "task": "generation", "difficulty": "Hard"},
     {"id": "229", "task": "editing", "difficulty": "Medium"},
     {"id": "207", "task": "editing", "difficulty": "Hard"},