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/stats/StatGamesDialog.jsx

@@ -15,7 +15,7 @@ const ERRORS = {403: 'STATS.DRILL.NOT_SHARED', 401: 'STATS.DRILL.EXPIRED'};
 /**
  * The games behind one number, 40 per page.
  *
- * @param request `{title, source, ticket, params}` or null (closed)
+ * @param request `{title, source, ticket, linked, params}` or null (closed)
  */
 export default function StatGamesDialog({request, onClose, onCloseAutoFocus}) {
     const {t, i18n} = useTranslation();
@@ -75,7 +75,7 @@ export default function StatGamesDialog({request, onClose, onCloseAutoFocus}) {
                     <ul className="space-y-2">
                         {state.games.map((game, index) => (
                             <li key={`${game.appid}-${index}`}>
-                                <GameRow game={game} value={value(game)} linked={request.source === 'own'}/>
+                                <GameRow game={game} value={value(game)} linked={request.source === 'own' || request.linked === true}/>
                             </li>
                         ))}
                     </ul>