feat(import): add the import page, multi-select add and the favorite platform

src/components/ManualGameCard.jsx

@@ -9,10 +9,7 @@ import {Card} from '@/components/ui/card';
 import {Input} from '@/components/ui/input';
 import {Label} from '@/components/ui/label';
 import useSessionExpired from '../hooks/useSessionExpired.js';
-import {hoursToMinutes, removeGame, updateManualGame} from '../utils/manualGames.js';
-
-// Two decimals: then hoursToMinutes gives back the same minute, so an unchanged form is not dirty.
-const toHours = (minutes) => (minutes > 0 ? String(Math.round((minutes / 60) * 100) / 100) : '');
+import {hoursToMinutes, removeGame, toHours, updateManualGame} from '../utils/manualGames.js';
 
 /**
  * Platform and hours of a game added by hand, and removing it. Steam games get both from the sync.