feat(ui): add follow button, follows card, and inbox page

src/components/AppHeader.points.test.jsx

@@ -24,6 +24,7 @@ describe('AppHeader points chip', () => {
         fetchRoutes({
             'GET /api/users/me': json(200, {role: 'USER', activeRole: 'USER'}),
             'GET /api/library/steam-profile': json(200, {}),
+            'GET /api/inbox': json(200, {results: [], unread: 0}),
             'GET /api/rewards/wallet': json(200, {balance: 135, catalog: [], owned: [], equipped: {}, history: []}),
         });
         renderWithProviders(<><Load/><AppHeader isAuthenticated onLogout={() => {}}/></>);