fix price error

frontend/src/EditGame.tsx

@@ -333,7 +333,7 @@ export function EditGame({ onShowToast }: Props) {
                   <input
                     type="number"
                     value={price}
-                    onChange={(e) => setPrice(Number(e.target.value))}
+                    onChange={(e) => setPrice(Number(e.target.value.replace(',', '.')))}
                     min="0"
                     step="0.01"
                     style={inputStyles}

frontend/src/GameList.tsx

@@ -463,7 +463,7 @@ export function GameList({ onShowToast }: Props) {
                   <input
                     type="number"
                     value={price}
-                    onChange={(e) => setPrice(Number(e.target.value))}
+                    onChange={(e) => setPrice(Number(e.target.value.replace(',', '.')))}
                     min="0"
                     step="0.01"
                     style={inputStyles}