feat: implement dashboard prototype

fe-app-podkop/src/helpers/onMount.ts

@@ -0,0 +1,30 @@
+export async function onMount(id: string): Promise<HTMLElement> {
+  return new Promise((resolve) => {
+    const el = document.getElementById(id);
+
+    if (el && el.offsetParent !== null) {
+      return resolve(el);
+    }
+
+    const observer = new MutationObserver(() => {
+      const target = document.getElementById(id);
+      if (target) {
+        const io = new IntersectionObserver((entries) => {
+          const visible = entries.some((e) => e.isIntersecting);
+          if (visible) {
+            observer.disconnect();
+            io.disconnect();
+            resolve(target);
+          }
+        });
+
+        io.observe(target);
+      }
+    });
+
+    observer.observe(document.body, {
+      childList: true,
+      subtree: true,
+    });
+  });
+}