fix: reduce workflow settings input lag

app/(admin)/settings/agent-workflow/agent-workflow-settings-client.tsx

@@ -1,7 +1,18 @@
 "use client";
 
 import Link from "next/link";
-import { useDeferredValue, useEffect, useMemo, useRef, useState, type ChangeEvent, type DragEvent, type ReactNode } from "react";
+import {
+  startTransition,
+  useDeferredValue,
+  useEffect,
+  useMemo,
+  useRef,
+  useState,
+  type ChangeEvent,
+  type ComponentProps,
+  type DragEvent,
+  type ReactNode,
+} from "react";
 import useSWR from "swr";
 import { toast } from "sonner";
 import { motion, AnimatePresence } from "framer-motion";
@@ -176,6 +187,150 @@ interface AgentWorkflowSettingsDraft {
   state: AgentWorkflowSettingsDraftState;
 }
 
+type BufferedInputProps = Omit<
+  ComponentProps<typeof Input>,
+  "defaultValue" | "onChange" | "value"
+> & {
+  commitDelayMs?: number;
+  onValueCommit: (value: string) => void;
+  value: string;
+};
+
+type BufferedTextareaProps = Omit<
+  ComponentProps<typeof Textarea>,
+  "defaultValue" | "onChange" | "value"
+> & {
+  commitDelayMs?: number;
+  onValueCommit: (value: string) => void;
+  value: string;
+};
+
+function scheduleWorkflowIdleTask(callback: () => void, timeoutMs = 2000) {
+  if (typeof window === "undefined") {
+    return () => {};
+  }
+
+  if ("requestIdleCallback" in window && "cancelIdleCallback" in window) {
+    const idleId = window.requestIdleCallback(callback, { timeout: timeoutMs });
+    return () => window.cancelIdleCallback(idleId);
+  }
+
+  const timer = window.setTimeout(callback, timeoutMs);
+  return () => window.clearTimeout(timer);
+}
+
+function BufferedInput({
+  commitDelayMs = 450,
+  onBlur,
+  onValueCommit,
+  value,
+  ...props
+}: BufferedInputProps) {
+  const [draftValue, setDraftValue] = useState(value);
+  const committedValueRef = useRef(value);
+
+  useEffect(() => {
+    setDraftValue(value);
+    committedValueRef.current = value;
+  }, [value]);
+
+  const commitValue = (nextValue: string, options?: { immediate?: boolean }) => {
+    if (nextValue === committedValueRef.current) {
+      return;
+    }
+
+    committedValueRef.current = nextValue;
+    if (options?.immediate) {
+      onValueCommit(nextValue);
+      return;
+    }
+
+    startTransition(() => {
+      onValueCommit(nextValue);
+    });
+  };
+
+  useEffect(() => {
+    if (draftValue === committedValueRef.current) {
+      return;
+    }
+
+    const timer = window.setTimeout(() => {
+      commitValue(draftValue);
+    }, commitDelayMs);
+
+    return () => window.clearTimeout(timer);
+  }, [commitDelayMs, draftValue]);
+
+  return (
+    <Input
+      {...props}
+      value={draftValue}
+      onChange={(event) => setDraftValue(event.target.value)}
+      onBlur={(event) => {
+        commitValue(draftValue, { immediate: true });
+        onBlur?.(event);
+      }}
+    />
+  );
+}
+
+function BufferedTextarea({
+  commitDelayMs = 450,
+  onBlur,
+  onValueCommit,
+  value,
+  ...props
+}: BufferedTextareaProps) {
+  const [draftValue, setDraftValue] = useState(value);
+  const committedValueRef = useRef(value);
+
+  useEffect(() => {
+    setDraftValue(value);
+    committedValueRef.current = value;
+  }, [value]);
+
+  const commitValue = (nextValue: string, options?: { immediate?: boolean }) => {
+    if (nextValue === committedValueRef.current) {
+      return;
+    }
+
+    committedValueRef.current = nextValue;
+    if (options?.immediate) {
+      onValueCommit(nextValue);
+      return;
+    }
+
+    startTransition(() => {
+      onValueCommit(nextValue);
+    });
+  };
+
+  useEffect(() => {
+    if (draftValue === committedValueRef.current) {
+      return;
+    }
+
+    const timer = window.setTimeout(() => {
+      commitValue(draftValue);
+    }, commitDelayMs);
+
+    return () => window.clearTimeout(timer);
+  }, [commitDelayMs, draftValue]);
+
+  return (
+    <Textarea
+      {...props}
+      value={draftValue}
+      onChange={(event) => setDraftValue(event.target.value)}
+      onBlur={(event) => {
+        commitValue(draftValue, { immediate: true });
+        onBlur?.(event);
+      }}
+    />
+  );
+}
+
 function stableStringifyWorkflowDraftValue(value: unknown): string {
   if (value === null || typeof value !== "object") {
     return JSON.stringify(value) ?? "null";
@@ -1419,6 +1574,7 @@ export function AgentWorkflowSettingsClient({
     Record<keyof AgentWorkflowSettingsPayload, string> | null
   >(null);
   const hasWarnedRemoteWorkflowUpdateRef = useRef(false);
+  const draftCancelRef = useRef<(() => void) | null>(null);
 
   useEffect(() => {
     if (!data) return;
@@ -1633,26 +1789,36 @@ export function AgentWorkflowSettingsClient({
 
     const draftTimer = window.setTimeout(() => {
       const updatedAt = Date.now();
-      try {
-        writeAgentWorkflowSettingsDraft({
-          version: 2,
-          updatedAt,
-          baseSignature:
-            serverDraftBaseSignatureRef.current ||
-            createAgentWorkflowSettingsStateSignature(autoDraftState),
-          baseSignatures:
-            serverDraftBaseSignaturesRef.current ||
-            createAgentWorkflowSettingsSectionSignatures(autoDraftState),
-          state: autoDraftState,
-        });
-        setAutoDraftUpdatedAt(updatedAt);
-        setAutoDraftStatus("saved");
-      } catch {
-        toast.error("本地自动保存失败，请及时手动保存配置");
-      }
-    }, 700);
+      const cancelIdleDraft = scheduleWorkflowIdleTask(() => {
+        try {
+          writeAgentWorkflowSettingsDraft({
+            version: 2,
+            updatedAt,
+            baseSignature:
+              serverDraftBaseSignatureRef.current ||
+              createAgentWorkflowSettingsStateSignature(autoDraftState),
+            baseSignatures:
+              serverDraftBaseSignaturesRef.current ||
+              createAgentWorkflowSettingsSectionSignatures(autoDraftState),
+            state: autoDraftState,
+          });
+          startTransition(() => {
+            setAutoDraftUpdatedAt(updatedAt);
+            setAutoDraftStatus("saved");
+          });
+        } catch {
+          toast.error("本地自动保存失败，请及时手动保存配置");
+        }
+      });
 
-    return () => window.clearTimeout(draftTimer);
+      draftCancelRef.current = cancelIdleDraft;
+    }, 1200);
+
+    return () => {
+      window.clearTimeout(draftTimer);
+      draftCancelRef.current?.();
+      draftCancelRef.current = null;
+    };
   }, [autoDraftState]);
 
   const sortedSteps = useMemo(
@@ -3603,12 +3769,12 @@ export function AgentWorkflowSettingsClient({
                 <div className="space-y-3">
                   <div className="space-y-1">
                     <Label className="text-xs">按钮名称</Label>
-                    <Input
+                    <BufferedInput
                       value={option.buttonName}
-                      onChange={(e) =>
+                      onValueCommit={(value) =>
                         updateOption(step.key, option.key, (currentOption) => ({
                           ...currentOption,
-                          buttonName: e.target.value,
+                          buttonName: value,
                         }))
                       }
                       placeholder="选项名称"
@@ -3617,12 +3783,12 @@ export function AgentWorkflowSettingsClient({
                   </div>
                   <div className="space-y-1">
                     <Label className="text-xs">说明文案</Label>
-                    <Input
+                    <BufferedInput
                       value={option.description || ""}
-                      onChange={(e) =>
+                      onValueCommit={(value) =>
                         updateOption(step.key, option.key, (currentOption) => ({
                           ...currentOption,
-                          description: e.target.value,
+                          description: value,
                         }))
                       }
                       placeholder="简短描述"
@@ -3637,13 +3803,13 @@ export function AgentWorkflowSettingsClient({
                         {AGENT_WORKFLOW_PROMPT_FRAGMENT_MAX_LENGTH}
                       </span>
                     </div>
-                    <Textarea
+                    <BufferedTextarea
                       value={option.promptFragment || ""}
                       maxLength={AGENT_WORKFLOW_PROMPT_FRAGMENT_MAX_LENGTH}
-                      onChange={(e) =>
+                      onValueCommit={(value) =>
                         updateOption(step.key, option.key, (currentOption) => ({
                           ...currentOption,
-                          promptFragment: e.target.value,
+                          promptFragment: value,
                         }))
                       }
                       placeholder="注入的提示词片段"
@@ -3973,12 +4139,12 @@ export function AgentWorkflowSettingsClient({
 
                   <div className="min-w-0 flex-1">
                     <div className="flex flex-wrap items-center gap-2">
-                      <Input
+                      <BufferedInput
                         value={step.title}
-                        onChange={(e) =>
+                        onValueCommit={(value) =>
                           updateStep(step.key, (currentStep) => ({
                             ...currentStep,
-                            title: e.target.value,
+                            title: value,
                           }))
                         }
                         className="h-8 min-w-[180px] max-w-[260px] border-0 bg-transparent px-0 text-base font-medium shadow-none focus-visible:ring-0"
@@ -4077,12 +4243,12 @@ export function AgentWorkflowSettingsClient({
                 <CardContent className="border-t bg-muted/20 pt-4">
                   <div className="mb-4 space-y-2">
                     <Label className="text-xs">模块说明</Label>
-                    <Textarea
+                    <BufferedTextarea
                       value={step.description || ""}
-                      onChange={(e) =>
+                      onValueCommit={(value) =>
                         updateStep(step.key, (currentStep) => ({
                           ...currentStep,
-                          description: e.target.value,
+                          description: value,
                         }))
                       }
                       rows={2}