add swiper view to show

src/app/services/fullscreen.ts

@@ -0,0 +1,13 @@
+const elem = document.documentElement;
+
+export const openFullscreen = () => {
+  if (elem.requestFullscreen) {
+    void elem.requestFullscreen();
+  }
+};
+
+export const closeFullscreen = () => {
+  if (document.exitFullscreen) {
+    void document.exitFullscreen();
+  }
+};