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

src/pages/SettingsPage.steamToast.test.jsx

@@ -36,6 +36,7 @@ describe('SettingsPage Steam toast', () => {
             'GET /api/users/me': json(200, profile),
             'POST /api/auth/refresh': {ok: true, status: 204, json: async () => { throw new SyntaxError('no body'); }},
             'GET /api/version': json(404, {}),
+            'GET /api/follows': json(200, {following: [], followers: []}),
         });
     });