feat(header): add community link to nav

Add an icon-only nav link to "/" so logged-in users can get back
to the community stats. Make room for it: less nav link padding
below sm, points chip no longer shrinks from lg, and the view-as
badge hangs below the header at every width.

src/components/AppHeader.test.jsx

@@ -16,11 +16,11 @@ afterEach(() => {
     useTranslation().i18n.language = 'de';
 });
 
-const loggedInAs = (me, routes = {}) => {
+const loggedInAs = (me, routes = {}, options = {}) => {
     localStorage.setItem('tbp_session', '1');
     fetchRoutes({'GET /api/users/me': json(200, me), 'GET /api/library/steam-profile': json(200, {}),
         'GET /api/inbox': json(200, {results: [], unread: 0}), ...routes});
-    renderWithProviders(<AppHeader isAuthenticated onLogout={() => {}}/>);
+    renderWithProviders(<AppHeader isAuthenticated onLogout={() => {}}/>, options);
 };
 
 const openMenu = () => fireEvent.keyDown(screen.getByRole('button', {name: 'NAV.MENU'}), {key: 'Enter'});
@@ -44,6 +44,29 @@ describe('AppHeader', () => {
         screen.getByText('ToBePlayed').style.display = 'none';
 
         expect(screen.getByRole('link', {name: 'ToBePlayed'})).toBeTruthy();
+        expect(screen.queryByTitle('NAV.COMMUNITY')).toBeNull();
+    });
+
+    it('links to the community stats when logged in', () => {
+        loggedInAs({role: 'USER', activeRole: 'USER'});
+
+        const link = screen.getByTitle('NAV.COMMUNITY');
+
+        expect(link.getAttribute('href')).toBe('/');
+        expect(link.getAttribute('aria-current')).toBe('page');
+    });
+
+    it('shows the community link as an icon without a text label', () => {
+        loggedInAs({role: 'USER', activeRole: 'USER'});
+
+        expect(screen.getByTitle('NAV.COMMUNITY').textContent).toBe('');
+    });
+
+    it('marks community active only on the landing page', () => {
+        loggedInAs({role: 'USER', activeRole: 'USER'}, {}, {entries: ['/dashboard']});
+
+        expect(screen.getByTitle('NAV.COMMUNITY').getAttribute('aria-current')).toBeNull();
+        expect(screen.getByTitle('NAV.DASHBOARD').getAttribute('aria-current')).toBe('page');
     });
 
     it('shows how many inbox notes are unread', async () => {