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/utils/statGames.js

@@ -47,8 +47,4 @@ export async function fetchStatGames(source, params, ticket) {
 
 export const libraryLink = (status) => `/library?hideDuplicates=true${status ? `&status=${status}` : ''}`;
 
-// A visitor has no game page of the owner; the Steam store is the only public one. Manual games have no appid there.
-export const gameHref = (appid, own) => {
-    if (own) return `/library/${appid}`;
-    return appid > 0 ? `https://store.steampowered.com/app/${appid}` : null;
-};
+export const gameHref = (appid) => `/library/${appid}`;

src/utils/statGames.test.js

@@ -27,9 +27,8 @@ describe('libraryLink', () => {
 });
 
 describe('gameHref', () => {
-    it('own_LinksTheLibraryPage', () => expect(gameHref(5, true)).toBe('/library/5'));
-    it('visitor_LinksTheStoreOnlyForSteamApps', () => {
-        expect(gameHref(5, false)).toBe('https://store.steampowered.com/app/5');
-        expect(gameHref(-3, false)).toBeNull();
+    it('linksTheLibraryPage', () => {
+        expect(gameHref(5)).toBe('/library/5');
+        expect(gameHref(-3)).toBe('/library/-3');
     });
 });