Fix DLC switch freeze: skip bulk cover scraping for themes/DLC

app/covers.py

@@ -411,6 +411,9 @@ def _fetch_libretro(name, timeout, system="games", indexed_only=False):
         data = fetch_libretro_local(name)
         if data is not None:
             return data
+    # Theme/DLC share the PSP thumbnails repo, so reuse the games index instead
+    # of downloading a duplicate copy of the same tree under a new system key.
+    idx_system = system if system in _PLATFORMS else "games"
     if not indexed_only:
         # 1. Cheap: exact + progressively stripped names (no index needed).
         for kind in _LIBRETRO_KINDS:
@@ -421,7 +424,7 @@ def _fetch_libretro(name, timeout, system="games", indexed_only=False):
     # 2. Fuzzy/exact via the precomputed index (covers exact names too, so the
     #    bulk loader skips the wasteful exact pass entirely).
     for kind in _LIBRETRO_KINDS:
-        best = _index_best(name, kind, system)
+        best = _index_best(name, kind, idx_system)
         if best:
             data = _fetch_png(best, kind, timeout, system)
             if data is not None:

app/gui.py

@@ -2040,7 +2040,10 @@ class StorePage(QWidget):
         p = covers.cover_path(rid, system)
         if p.exists() and covers.file_is_image(p):
             item.setIcon(QIcon(_fit_pixmap(QPixmap(str(p)), self.ICON_W, self.ICON_H)))
-        elif rid not in self._cover_attempted:
+        elif system not in ("theme", "dlc") and rid not in self._cover_attempted:
+            # Themes and DLC have no meaningful box art in libretro/IGDB, and
+            # bulk-scraping hundreds of them on every switch to the DLC list
+            # saturates the network/CPU and makes the store unresponsive.
             self._cover_attempted.add(rid)
             self._cover_queue.append((row, {
                 "name": covers.plain_title(it["name"]) or it["name"],
@@ -2287,9 +2290,9 @@ class StorePage(QWidget):
             meta = dlg.selected_meta
             if meta:
                 title = meta.get("title") or None
-                info.save(str(rid), "games", meta, manual=True, title=title)
+                info.save(str(rid), system, meta, manual=True, title=title)
                 it["title_override"] = title or None
-            self._refresh_item_cover(it, rid, "games")
+            self._refresh_item_cover(it, rid, system)
 
     def _refresh_item_cover(self, it, rid, system):
         p = covers.cover_path(rid, system)