feat: new settings and mainpage blocks

frontend/admin/src/utils/constants..js

@@ -0,0 +1,7 @@
+export const sliderEffectOptions = {
+  slide: 'Слайд',
+  flip: 'Переворот',
+  cards: 'Карточки',
+  cube: 'Куб',
+  coverflow: 'Перекрывающиеся слайды',
+};

frontend/admin/src/utils/helpers.js

@@ -0,0 +1,7 @@
+export function getThumb(imageUrl) {
+  if (!imageUrl) return '/image/cache/no_image-100x100.png';
+  const extIndex = imageUrl.lastIndexOf('.');
+  const ext = imageUrl.substring(extIndex);
+  const filename = imageUrl.substring(0, extIndex);
+  return `/image/cache/${filename}-100x100${ext}`;
+}