feat(ui): make stat numbers clickable to open games

StatDrill context holds one dialog for a page. StatCount wraps a number:
total and status counts link to the library filter, other numbers open
StatGamesDialog. DrillRow and DrillButton support drill-down in tag bars
(genres, platforms, moods) and other stat displays. Dialog shows 40 games
per page with bottom-sheet layout on phones, handles pagination and errors
(403 not shared, 401 expired, 400 bad argument).

src/pages/LandingPage.test.jsx

@@ -1,6 +1,6 @@
 // @vitest-environment jsdom
 import {afterEach, describe, expect, it, vi} from 'vitest';
-import {cleanup, render, screen} from '@testing-library/react';
+import {cleanup, fireEvent, render, screen} from '@testing-library/react';
 import {MemoryRouter} from 'react-router-dom';
 import LandingPage from './LandingPage.jsx';
 import {fetchRoutes, json} from '../test/fetchRoutes.js';
@@ -42,4 +42,20 @@ describe('LandingPage', () => {
             expect(screen.queryByText(`LANDING.${title}`)).toBeNull();
         }
     });
+
+    it('opensTheGamesBehindTheTotalButNotBehindOneUsersLibrary', async () => {
+        fetchRoutes({
+            'GET /api/stats/public': json(200, {topPlayedGames: [], topOwnedGames: [], totalLibraryEntries: 9, biggestLibrary: 4}),
+            'GET /api/stats/public/games': json(200, {content: [{appid: 3, name: 'Common', libraries: 2, minutes: 60}],
+                page: 0, size: 40, totalElements: 1, totalPages: 1}),
+        });
+        renderPage();
+
+        fireEvent.click(await screen.findByRole('button', {name: /LANDING\.TOTAL_GAMES/}));
+
+        expect(await screen.findByText('Common')).toBeTruthy();
+        expect(fetch.mock.calls.at(-1)[0]).toContain('/api/stats/public/games?key=ENTRIES&page=0');
+        expect(screen.queryByRole('button', {name: /LANDING\.BIGGEST_LIBRARY/})).toBeNull();
+        expect(screen.queryByRole('button', {name: /LANDING\.TOTAL_USERS/})).toBeNull();
+    });
 });