优化 peq 流程

client/src/pages/eq/components/BatchEditDialog.tsx

@@ -6,6 +6,7 @@ export function BatchEditDialog({
   text,
   onChangeText,
   onSave,
+  saving = false,
   onClose,
   eqUi,
 }: {
@@ -13,6 +14,7 @@ export function BatchEditDialog({
   text: string;
   onChangeText: (v: string) => void;
   onSave: () => void;
+  saving?: boolean;
   onClose: () => void;
   eqUi: PeqEqUi;
 }) {
@@ -34,6 +36,7 @@ export function BatchEditDialog({
             type="button"
             className="text-white/45 hover:text-white/75 transition-colors"
             onClick={onClose}
+            disabled={saving}
           >
             <X size={20} />
           </button>
@@ -43,6 +46,7 @@ export function BatchEditDialog({
         </p>
         <textarea
           value={text}
+          disabled={saving}
           onChange={(e) => onChangeText(e.target.value)}
           spellCheck={false}
           className="h-[360px] w-full resize-none overflow-auto rounded-[10px] border border-white/12 bg-[#15171b] p-3 font-mono text-[13px] leading-6 text-white/90 outline-none focus:border-[#00FFF6]/55"
@@ -52,6 +56,7 @@ export function BatchEditDialog({
             type="button"
             className="px-5 py-2 rounded-full text-[24px] text-white/80 bg-[#3f4349] hover:bg-[#4a4f56] transition-colors"
             onClick={onClose}
+            disabled={saving}
           >
             {eqUi.cancel}
           </button>
@@ -59,6 +64,8 @@ export function BatchEditDialog({
             type="button"
             className="px-5 py-2 rounded-full text-[24px] text-black bg-[#00FFF6] hover:brightness-95 transition-all"
             onClick={onSave}
+            disabled={saving}
+            aria-busy={saving}
           >
             {eqUi.save}
           </button>

client/src/pages/eq/hooks/usePeqUndoHistory.ts

@@ -16,6 +16,7 @@ export type PeqUndoSnapshot = {
   bandsByMode: { A: PeqUndoBand[]; B: PeqUndoBand[] };
   preamp: number;
   autoPre: number;
+  metaByMode?: Record<"A" | "B", { preamp: number; autoPre: number }>;
 };
 
 function cloneSnapshot(snapshot: PeqUndoSnapshot): PeqUndoSnapshot {
@@ -27,6 +28,7 @@ function cloneSnapshot(snapshot: PeqUndoSnapshot): PeqUndoSnapshot {
     },
     preamp: snapshot.preamp,
     autoPre: snapshot.autoPre,
+    ...(snapshot.metaByMode ? { metaByMode: { A: { ...snapshot.metaByMode.A }, B: { ...snapshot.metaByMode.B } } } : {}),
   };
 }
 
@@ -36,6 +38,7 @@ export function peqUndoSnapshotsEqual(
 ): boolean {
   if (a.abMode !== b.abMode) return false;
   if (a.preamp !== b.preamp || a.autoPre !== b.autoPre) return false;
+  if (JSON.stringify(a.metaByMode) !== JSON.stringify(b.metaByMode)) return false;
   return (
     JSON.stringify(a.bandsByMode.A) === JSON.stringify(b.bandsByMode.A) &&
     JSON.stringify(a.bandsByMode.B) === JSON.stringify(b.bandsByMode.B)