feat(ui): add smallest-first size sort

The redesign only offered a largest-first size sort. Keep the existing `size`
preference value as largest for compatibility with saved settings and add a new
ascending size key for users who want to find small downloads first.

The sort menu now exposes both size directions and the sorter handles the new
smallest-first option directly.

Test Plan:
- git diff --check

Refs: user redesign nitpick about Size (smallest) sort

crates/lanspread-tauri-deno-ts/src/lib/gameState.ts

@@ -209,6 +209,8 @@ export const applyFilterAndSort = (
             return [...list].sort((a, b) => a.name.localeCompare(b.name));
         case 'size':
             return [...list].sort((a, b) => b.size - a.size);
+        case 'sizeAsc':
+            return [...list].sort((a, b) => a.size - b.size);
         case 'status':
             return [...list].sort(compareByState);
     }