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/components/AppHeader.test.jsx

@@ -20,7 +20,8 @@ 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}),
-        'GET /api/library/questions/count': json(200, {count: 0}), ...routes});
+        'GET /api/library/questions/count': json(200, {count: 0}),
+        'GET /api/library/removed-games': json(200, {results: []}), ...routes});
     renderWithProviders(<AppHeader isAuthenticated onLogout={() => {}}/>, options);
 };
 
@@ -108,6 +109,24 @@ describe('AppHeader', () => {
         expect((await screen.findByRole('link', {name: 'NAV.QUESTIONS_OPEN:2'})).className).not.toContain('max-sm:hidden');
     });
 
+    it('keeps the questions icon at every width while the user has removed games', async () => {
+        loggedInAs({role: 'USER', activeRole: 'USER'},
+            {'GET /api/library/removed-games': json(200, {results: [{appid: 1, name: 'Game'}]})});
+
+        await vi.waitFor(() => expect(screen.getByTitle('NAV.QUESTIONS').className).not.toContain('max-sm:hidden'));
+    });
+
+    it('skipsTheRemovedGamesCallWhileQuestionsAreOpen', async () => {
+        const removed = vi.fn(() => json(200, {results: []}));
+        loggedInAs({role: 'USER', activeRole: 'USER'}, {'GET /api/library/questions/count': json(200, {count: 2}),
+            'GET /api/library/removed-games': removed});
+
+        await screen.findByRole('link', {name: 'NAV.QUESTIONS_OPEN:2'});
+        await new Promise((resolve) => setTimeout(resolve, 0));
+
+        expect(removed).not.toHaveBeenCalled();
+    });
+
     it('keeps the questions icon below sm on the questions page, without a badge', async () => {
         loggedInAs({role: 'USER', activeRole: 'USER'}, {'GET /api/library/questions/count': json(200, {count: 0})},
             {entries: ['/questions']});