Keep shop/item meta in git and fix category icon filenames.

Drop the accidental itemcat_*.png.png downloads by stripping the
existing .png suffix before download_icons appends one. Leave daily
leaderboards/streamers and ignored OpenDota/STRATZ caches uncommitted.

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

web/fetch_item_shop.py

@@ -337,8 +337,17 @@ def main() -> None:
         saved, skipped, fail = download_shop_icons(icon_keys, force=args.force_icons)
         print(f"  item icons saved={saved} skipped={skipped} fail={fail}", flush=True)
         print(f"downloading {len(cat_files)} category icons...", flush=True)
+        # CAT_ICON_BY_LABEL values already include ".png"; download_icons appends
+        # another ".png", so pass bare stems + a full URL template.
+        cat_keys = {
+            name[:-4] if name.endswith(".png") else name for name in cat_files
+        }
         c_saved, c_skipped, c_fail = download_icons(
-            cat_files, CAT_ICON_BASE + "{key}", ITEM_CAT_ICONS, force=args.force_icons, delay=0.05
+            cat_keys,
+            CAT_ICON_BASE + "{key}.png",
+            ITEM_CAT_ICONS,
+            force=args.force_icons,
+            delay=0.05,
         )
         print(f"  cat icons saved={c_saved} skipped={c_skipped} fail={c_fail}", flush=True)