feat(questions): list and restore removed games

Add a "Removed games" section on the questions page and an Undo
toast after removing a manual game (#39).

src/pages/QuestionsPage.test.jsx

@@ -17,6 +17,7 @@ const booked = (appid) => ({balance: 30, missing: {}, paid: [{kind: 'FINISHED',
 const WALLET = {
     'GET /api/rewards/wallet': json(200, {balance: 30, catalog: [], owned: [], equipped: {}, history: []}),
     'GET /api/rewards/expected': json(200, {}),
+    'GET /api/library/removed-games': json(200, {results: []}),
 };
 const expectedCalls = () => globalThis.fetch.mock.calls.filter(([url]) => url.includes('/api/rewards/expected'));
 const pointsCalls = () => globalThis.fetch.mock.calls.filter(([url]) => url.includes('/api/rewards/games/'));
@@ -40,6 +41,16 @@ afterEach(() => {
 });
 
 describe('QuestionsPage', () => {
+    it('showsTheRemovedGamesSectionAlsoWithoutQuestions', async () => {
+        renderPage({
+            'GET /api/library/questions': json(200, {results: []}),
+            'GET /api/library/removed-games': json(200, {results: [{appid: -1, name: 'Zelda', imageUrl: null, source: 'MANUAL', platform: 'Switch'}]}),
+        });
+
+        expect(await screen.findByText('QUESTIONS.EMPTY')).toBeTruthy();
+        expect(await screen.findByText('REMOVED_GAMES.TITLE_COUNT:1')).toBeTruthy();
+    });
+
     it('showsOneCardPerGameWithTheCountInTheTitle', async () => {
         renderPage({'GET /api/library/questions': json(200, {results: [card(1, 'START'), card(2, 'FINISHED')]})});