refactor: clean up unused imports and improve file loading logic

src/lib/misc.ts

@@ -0,0 +1,7 @@
+export function debounce<T extends (...args: any[]) => void>(fn: T, delay = 200) {
+    let timer: ReturnType<typeof setTimeout> | null = null;
+    return (...args: Parameters<T>) => {
+        if (timer) clearTimeout(timer);
+        timer = setTimeout(async () => await fn(...args), delay);
+    };
+}