diff --git a/app/(admin)/settings/agent-workflow/agent-workflow-settings-client.tsx b/app/(admin)/settings/agent-workflow/agent-workflow-settings-client.tsx
index 3fb2aa861..dc53dd505 100644
--- a/app/(admin)/settings/agent-workflow/agent-workflow-settings-client.tsx
+++ b/app/(admin)/settings/agent-workflow/agent-workflow-settings-client.tsx
@@ -113,6 +113,14 @@ import { Switch } from "@/components/ui/switch";
 import { Badge } from "@/components/ui/badge";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import { Collapsible, CollapsibleContent, CollapsibleTrigger } from "@/components/ui/collapsible";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
 import { Separator } from "@/components/ui/separator";
 import { SearchableSelect } from "@/components/ui/searchable-select";
 import { cn } from "@/lib/utils";
@@ -160,6 +168,7 @@ const WORKFLOW_STEP_DRAG_DATA_TYPE = "application/x-agent-workflow-step";
 const WORKFLOW_SETTINGS_DRAFT_STORAGE_KEY = "agent-workflow-settings-draft:v1";
 const WORKFLOW_SETTINGS_STALE_DRAFT_STORAGE_KEY = "agent-workflow-settings-stale-draft:v1";
 const WORKFLOW_SETTINGS_DRAFT_MAX_AGE_MS = 7 * 24 * 60 * 60 * 1000;
+const DELETE_WORKFLOW_STEP_PASSWORD = "123456";
 
 type WorkflowStepDropPosition = "before" | "after" | "inside";
 
@@ -258,15 +267,26 @@ function scheduleWorkflowIdleTask(callback: () => void, timeoutMs = 2000) {
 function BufferedInput({
   commitDelayMs = 450,
   onBlur,
+  onCompositionEnd,
+  onCompositionStart,
+  onFocus,
   onValueCommit,
   value,
   ...props
 }: BufferedInputProps) {
   const [draftValue, setDraftValue] = useState(value);
   const committedValueRef = useRef(value);
+  const draftValueRef = useRef(value);
+  const isFocusedRef = useRef(false);
+  const isComposingRef = useRef(false);
 
   useEffect(() => {
+    if (isFocusedRef.current && draftValueRef.current !== committedValueRef.current) {
+      return;
+    }
+
     setDraftValue(value);
+    draftValueRef.current = value;
     committedValueRef.current = value;
   }, [value]);
 
@@ -287,7 +307,7 @@ function BufferedInput({
   };
 
   useEffect(() => {
-    if (draftValue === committedValueRef.current) {
+    if (draftValue === committedValueRef.current || isComposingRef.current) {
       return;
     }
 
@@ -302,9 +322,30 @@ function BufferedInput({
     <Input
       {...props}
       value={draftValue}
-      onChange={(event) => setDraftValue(event.target.value)}
+      onChange={(event) => {
+        const nextValue = event.target.value;
+        draftValueRef.current = nextValue;
+        setDraftValue(nextValue);
+      }}
+      onFocus={(event) => {
+        isFocusedRef.current = true;
+        onFocus?.(event);
+      }}
+      onCompositionStart={(event) => {
+        isComposingRef.current = true;
+        onCompositionStart?.(event);
+      }}
+      onCompositionEnd={(event) => {
+        isComposingRef.current = false;
+        const nextValue = event.currentTarget.value;
+        draftValueRef.current = nextValue;
+        setDraftValue(nextValue);
+        commitValue(nextValue);
+        onCompositionEnd?.(event);
+      }}
       onBlur={(event) => {
-        commitValue(draftValue, { immediate: true });
+        isFocusedRef.current = false;
+        commitValue(draftValueRef.current, { immediate: true });
         onBlur?.(event);
       }}
     />
@@ -314,15 +355,26 @@ function BufferedInput({
 function BufferedTextarea({
   commitDelayMs = 450,
   onBlur,
+  onCompositionEnd,
+  onCompositionStart,
+  onFocus,
   onValueCommit,
   value,
   ...props
 }: BufferedTextareaProps) {
   const [draftValue, setDraftValue] = useState(value);
   const committedValueRef = useRef(value);
+  const draftValueRef = useRef(value);
+  const isFocusedRef = useRef(false);
+  const isComposingRef = useRef(false);
 
   useEffect(() => {
+    if (isFocusedRef.current && draftValueRef.current !== committedValueRef.current) {
+      return;
+    }
+
     setDraftValue(value);
+    draftValueRef.current = value;
     committedValueRef.current = value;
   }, [value]);
 
@@ -343,7 +395,7 @@ function BufferedTextarea({
   };
 
   useEffect(() => {
-    if (draftValue === committedValueRef.current) {
+    if (draftValue === committedValueRef.current || isComposingRef.current) {
       return;
     }
 
@@ -358,9 +410,30 @@ function BufferedTextarea({
     <Textarea
       {...props}
       value={draftValue}
-      onChange={(event) => setDraftValue(event.target.value)}
+      onChange={(event) => {
+        const nextValue = event.target.value;
+        draftValueRef.current = nextValue;
+        setDraftValue(nextValue);
+      }}
+      onFocus={(event) => {
+        isFocusedRef.current = true;
+        onFocus?.(event);
+      }}
+      onCompositionStart={(event) => {
+        isComposingRef.current = true;
+        onCompositionStart?.(event);
+      }}
+      onCompositionEnd={(event) => {
+        isComposingRef.current = false;
+        const nextValue = event.currentTarget.value;
+        draftValueRef.current = nextValue;
+        setDraftValue(nextValue);
+        commitValue(nextValue);
+        onCompositionEnd?.(event);
+      }}
       onBlur={(event) => {
-        commitValue(draftValue, { immediate: true });
+        isFocusedRef.current = false;
+        commitValue(draftValueRef.current, { immediate: true });
         onBlur?.(event);
       }}
     />
@@ -1820,6 +1893,9 @@ export function AgentWorkflowSettingsClient({
   const [copiedWorkflowStep, setCopiedWorkflowStep] = useState<AgentWorkflowStepUiConfig | null>(
     null
   );
+  const [pendingDeleteStepKey, setPendingDeleteStepKey] = useState<string | null>(null);
+  const [deleteStepPassword, setDeleteStepPassword] = useState("");
+  const [deleteStepDialogOpen, setDeleteStepDialogOpen] = useState(false);
   const [autoDraftUpdatedAt, setAutoDraftUpdatedAt] = useState<number | null>(null);
   const [autoDraftStatus, setAutoDraftStatus] = useState<"idle" | "restored" | "saved">("idle");
   const [recoverableDraftUpdatedAt, setRecoverableDraftUpdatedAt] = useState<number | null>(null);
@@ -2115,6 +2191,13 @@ export function AgentWorkflowSettingsClient({
     () => new Map(workflowStepAnalyses.map((item) => [item.key, item] as const)),
     [workflowStepAnalyses]
   );
+  const pendingDeleteStep = useMemo(
+    () =>
+      pendingDeleteStepKey
+        ? findAgentWorkflowStepByKey(config.steps, pendingDeleteStepKey)
+        : null,
+    [config.steps, pendingDeleteStepKey]
+  );
   const workflowSpecialModuleOptions = useMemo(
     () =>
       getAgentWorkflowSpecialModuleRootOptions(deferredWorkflowSteps || []).map((option) => ({
@@ -3043,6 +3126,12 @@ export function AgentWorkflowSettingsClient({
     }
   };
 
+  const handleRequestRemoveStep = (stepKey: string) => {
+    setPendingDeleteStepKey(stepKey);
+    setDeleteStepPassword("");
+    setDeleteStepDialogOpen(true);
+  };
+
   const handleRemoveStep = (stepKey: string) => {
     const targetStep = findAgentWorkflowStepByKey(config.steps, stepKey);
     setConfig((prev) =>
@@ -3060,6 +3149,25 @@ export function AgentWorkflowSettingsClient({
     });
   };
 
+  const handleConfirmRemoveStep = () => {
+    if (deleteStepPassword.trim() !== DELETE_WORKFLOW_STEP_PASSWORD) {
+      toast.error("删除密码错误，请输入正确密码");
+      return;
+    }
+
+    if (!pendingDeleteStepKey) {
+      toast.error("没有找到要删除的模块");
+      return;
+    }
+
+    const deleteStepTitle = pendingDeleteStep?.title || pendingDeleteStepKey;
+    handleRemoveStep(pendingDeleteStepKey);
+    setDeleteStepDialogOpen(false);
+    setPendingDeleteStepKey(null);
+    setDeleteStepPassword("");
+    toast.success(`已删除模块「${deleteStepTitle}」`);
+  };
+
   const canMoveWorkflowStep = (
     sourceStepKey: string | null,
     targetStepKey: string | null,
@@ -5070,7 +5178,7 @@ export function AgentWorkflowSettingsClient({
                       variant="ghost"
                       size="icon"
                       className="h-8 w-8 text-destructive"
-                      onClick={() => handleRemoveStep(step.key)}
+                      onClick={() => handleRequestRemoveStep(step.key)}
                     >
                       <Trash2 className="h-4 w-4" />
                     </Button>
@@ -6947,6 +7055,70 @@ export function AgentWorkflowSettingsClient({
           </TabsContent>
         </Tabs>
       </main>
+
+      <Dialog
+        open={deleteStepDialogOpen}
+        onOpenChange={(open) => {
+          setDeleteStepDialogOpen(open);
+          if (!open) {
+            setPendingDeleteStepKey(null);
+            setDeleteStepPassword("");
+          }
+        }}
+      >
+        <DialogContent className="sm:max-w-[460px]">
+          <form
+            className="space-y-4"
+            onSubmit={(event) => {
+              event.preventDefault();
+              handleConfirmRemoveStep();
+            }}
+          >
+            <DialogHeader>
+              <DialogTitle>确认删除模块</DialogTitle>
+              <DialogDescription>
+                删除模块会同时移除该模块下的卡片和子模块。请输入删除密码后继续。
+              </DialogDescription>
+            </DialogHeader>
+
+            <div className="space-y-2">
+              <Label htmlFor="workflow-delete-step-password">删除模块</Label>
+              <div className="rounded-md border bg-muted/30 px-3 py-2 text-sm">
+                {pendingDeleteStep?.title || pendingDeleteStepKey || "未选择模块"}
+              </div>
+            </div>
+
+            <div className="space-y-2">
+              <Label htmlFor="workflow-delete-step-password">删除密码</Label>
+              <Input
+                id="workflow-delete-step-password"
+                type="password"
+                value={deleteStepPassword}
+                onChange={(event) => setDeleteStepPassword(event.target.value)}
+                placeholder="请输入删除密码"
+                autoComplete="current-password"
+                autoFocus
+              />
+              <p className="text-xs text-muted-foreground">
+                当前固定删除密码为 123456，输错不会删除任何数据。
+              </p>
+            </div>
+
+            <DialogFooter>
+              <Button
+                type="button"
+                variant="outline"
+                onClick={() => setDeleteStepDialogOpen(false)}
+              >
+                取消
+              </Button>
+              <Button type="submit" variant="destructive">
+                确认删除
+              </Button>
+            </DialogFooter>
+          </form>
+        </DialogContent>
+      </Dialog>
     </div>
   );
 }