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/PileOfShameCard.jsx

@@ -36,7 +36,7 @@ export default function PileOfShameCard({summary, trend, syncing, onShuffle, shu
 
             <div>
                 <div className="flex items-baseline gap-2">
-                    <StatCount to={libraryLink('BACKLOG')} title={t('DASHBOARD.PILE_OF_SHAME')} params={{key: 'PILE'}}
+                    <StatCount to={libraryLink('BACKLOG')} title={t('DASHBOARD.PILE_OF_SHAME')} params={{key: 'PILE'}} count={backlog}
                                label={`${t('BACKLOG.STATUS.BACKLOG')}: ${backlog}`}>
                         <span className="text-4xl font-bold tabular-nums">{backlog.toLocaleString(i18n.language)}</span>
                     </StatCount>
@@ -77,7 +77,8 @@ export default function PileOfShameCard({summary, trend, syncing, onShuffle, shu
                             <li key={s} className="flex items-center gap-1.5">
                                 <span className={`size-2 rounded-full ${STATUS_META[s].bar}`}/>
                                 {t(`BACKLOG.STATUS.${s}`)}
-                                <StatCount to={libraryLink(s)} label={`${t(`BACKLOG.STATUS.${s}`)}: ${summary.byStatus[s]}`}>
+                                <StatCount to={libraryLink(s)} count={summary.byStatus[s]}
+                                           label={`${t(`BACKLOG.STATUS.${s}`)}: ${summary.byStatus[s]}`}>
                                     <span className="tabular-nums text-foreground">{summary.byStatus[s]}</span>
                                 </StatCount>
                             </li>