Restore UI functionalities and clean up dependencies

backendia/dashboard/node_modules/next/dist/shared/lib/mitt.d.ts

@@ -0,0 +1,8 @@
+type Handler = (...evts: any[]) => void;
+export type MittEmitter<T> = {
+    on(type: T, handler: Handler): void;
+    off(type: T, handler: Handler): void;
+    emit(type: T, ...evts: any[]): void;
+};
+export default function mitt(): MittEmitter<string>;
+export {};