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 c773295e2..28dc60e8c 100644
--- a/app/(admin)/settings/agent-workflow/agent-workflow-settings-client.tsx
+++ b/app/(admin)/settings/agent-workflow/agent-workflow-settings-client.tsx
@@ -2717,11 +2717,23 @@ export function AgentWorkflowSettingsClient({
         throw new Error(message);
       }
 
-      toast.success("风格化工作流配置已保存");
+      const updatedSettings = await mutate();
+      const savedWorkflowConfig = normalizeAgentWorkflowUiConfig(
+        updatedSettings?.agentWorkflowUiConfig
+      );
+      const expectedStepCount = countAgentWorkflowSteps(config.steps || []);
+      const savedStepCount = countAgentWorkflowSteps(savedWorkflowConfig.steps || []);
+      if (savedStepCount !== expectedStepCount) {
+        toast.error(
+          `服务端回读到的模块数量不一致（本地 ${expectedStepCount} / 服务端 ${savedStepCount}），已保留本地自动草稿，请先不要刷新页面。`
+        );
+        return;
+      }
+
       removeAgentWorkflowSettingsDraft();
       setAutoDraftUpdatedAt(null);
       setAutoDraftStatus("idle");
-      await mutate();
+      toast.success("风格化工作流配置已保存");
     } catch (error) {
       toast.error(error instanceof Error ? error.message : "保存失败");
     } finally {
diff --git a/app/api/site-settings/route.ts b/app/api/site-settings/route.ts
index 831fae190..b5f9f5d3f 100644
--- a/app/api/site-settings/route.ts
+++ b/app/api/site-settings/route.ts
@@ -701,6 +701,32 @@ export async function GET() {
 
 const AGENT_WORKFLOW_INPUT_OPTIONS_MAX_ITEMS = 5000;
 
+const agentWorkflowOptionSchema: z.ZodTypeAny = z.lazy(() =>
+  z.object({
+    key: z.string().trim().min(1).max(64),
+    buttonName: z.string().trim().min(1).max(64),
+    description: z.string().trim().max(300).nullable().optional(),
+    previewImageUrl: z.string().trim().max(1000).nullable().optional(),
+    enabled: z.boolean().optional(),
+    sortOrder: z.number().min(0).max(999).optional(),
+    promptFragment: z.string().trim().max(1000).nullable().optional(),
+    blockedOptionKeys: z.array(z.string().trim().min(1).max(64)).max(100).optional(),
+    children: z.array(agentWorkflowOptionSchema).max(100).optional(),
+  })
+);
+
+const agentWorkflowStepSchema: z.ZodTypeAny = z.lazy(() =>
+  z.object({
+    key: z.string().trim().min(1).max(64),
+    title: z.string().trim().min(1).max(64),
+    description: z.string().trim().max(300).nullable().optional(),
+    enabled: z.boolean().optional(),
+    sortOrder: z.number().min(0).max(999).optional(),
+    options: z.array(agentWorkflowOptionSchema).max(100),
+    children: z.array(agentWorkflowStepSchema).max(100).optional(),
+  })
+);
+
 const updateSchema = z.object({
   siteName: z.string().min(1).max(128).optional(),
   siteLogo: z.string().nullable().optional(),
@@ -892,35 +918,7 @@ const updateSchema = z.object({
         })
         .optional(),
       steps: z
-        .array(
-          z.object({
-            key: z.string().trim().min(1).max(64),
-            title: z.string().trim().min(1).max(64),
-            description: z.string().trim().max(300).nullable().optional(),
-            enabled: z.boolean().optional(),
-            sortOrder: z.number().min(0).max(999).optional(),
-            options: z
-              .array(
-                z.lazy(() =>
-                  z.object({
-                    key: z.string().trim().min(1).max(64),
-                    buttonName: z.string().trim().min(1).max(64),
-                    description: z.string().trim().max(300).nullable().optional(),
-                    previewImageUrl: z.string().trim().max(1000).nullable().optional(),
-                    enabled: z.boolean().optional(),
-                    sortOrder: z.number().min(0).max(999).optional(),
-                    promptFragment: z.string().trim().max(1000).nullable().optional(),
-                    blockedOptionKeys: z
-                      .array(z.string().trim().min(1).max(64))
-                      .max(100)
-                      .optional(),
-                    children: z.array(z.any()).max(100).optional(),
-                  })
-                )
-              )
-              .max(100),
-          })
-        )
+        .array(agentWorkflowStepSchema)
         .max(20),
     })
     .optional(),