fix(stats): open game detail pages from stat lists, perfect games clickable

Add perfect games click-through on the dashboard. Remove Steam store
links from game lists. Stat numbers with count 0 are not clickable.
Tests cover the perfect-games click, zero guards, and owner versus
visitor behavior.

src/components/StatCard.jsx

@@ -32,7 +32,7 @@ function useCountUp(target, durationMs = 1600) {
 export default function StatCard({label, value, icon: Icon, suffix, drill}) {
     const {i18n} = useTranslation();
     const animated = useCountUp(value);
-    const target = useDrillTarget({title: label, ...drill});
+    const target = useDrillTarget({title: label, count: value, ...drill});
     const card = (
         <Card className="gap-3 p-5">
             {Icon && (