refactor: consolidate shared application helpers

hooks/use-debounced-autosave.ts

@@ -1,10 +1,24 @@
 "use client";
 
 import { useCallback, useEffect, useRef, useState } from "react";
-import { registerPendingSave } from "@/lib/admin-form-save-bridge";
 
 export type AutoSaveStatus = "clean" | "dirty" | "saving" | "saved" | "error";
 
+type FlushSave = () => Promise<void>;
+
+const pendingSaves = new Set<FlushSave>();
+
+export function registerPendingSave(flush: FlushSave) {
+  pendingSaves.add(flush);
+  return () => {
+    pendingSaves.delete(flush);
+  };
+}
+
+export async function flushPendingSaves() {
+  await Promise.all([...pendingSaves].map((flush) => flush()));
+}
+
 export function useDebouncedAutoSave({
   save,
   delay = 1000,