fix: stabilize psd template admin and export render

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

@@ -66,6 +66,26 @@ import type { AgentWorkflowUiConfig } from "@/types/agent";
 
 const fetcher = (url: string) => fetch(url, { cache: "no-store" }).then((res) => res.json());
 
+async function fetchPsdTemplateList(url: string): Promise<AgentPsdTemplateListResponse> {
+  const response = await fetch(url, { cache: "no-store" });
+  const payload = (await response
+    .json()
+    .catch(() => null)) as Partial<AgentPsdTemplateListResponse> | null;
+
+  if (
+    !response.ok ||
+    !payload ||
+    payload.success !== true ||
+    !Array.isArray(payload.templates)
+  ) {
+    throw new Error(
+      String(payload?.error || "").trim() || "PSD 模板读取失败"
+    );
+  }
+
+  return payload as AgentPsdTemplateListResponse;
+}
+
 const SYSTEM_FONT_OPTIONS = [
   { id: "__system_sans", label: "系统无衬线", family: "sans-serif" },
   { id: "__system_serif", label: "系统衬线", family: "serif" },
@@ -227,9 +247,19 @@ export function PsdTemplatesSettingsClient({
   backHref: string;
   backLabel: string;
 }) {
-  const { data, mutate, isLoading } = useSWR<AgentPsdTemplateListResponse>(
+  const {
+    data,
+    error: templatesRequestError,
+    mutate,
+    isLoading,
+  } = useSWR<AgentPsdTemplateListResponse>(
     "/api/admin/psd-templates",
-    fetcher
+    fetchPsdTemplateList,
+    {
+      keepPreviousData: true,
+      revalidateOnFocus: false,
+      dedupingInterval: 10_000,
+    }
   );
   const { data: siteSettingsData, mutate: mutateSiteSettings } = useSWR<{
     agentWorkflowUiConfig?: AgentWorkflowUiConfig;
@@ -244,11 +274,15 @@ export function PsdTemplatesSettingsClient({
 
   const templates = useMemo(() => (data?.success ? data.templates : []), [data]);
   const templateListErrorMessage = useMemo(() => {
+    if (templatesRequestError instanceof Error) {
+      return templatesRequestError.message.trim() || "PSD 模板读取失败";
+    }
+
     if (!data || data.success) {
       return "";
     }
     return String(data.error || "").trim() || "PSD 模板读取失败";
-  }, [data]);
+  }, [data, templatesRequestError]);
   const fonts = useMemo(() => (fontsData?.success ? fontsData.fonts : []), [fontsData]);
   const brandOptions = useMemo(
     () =>
@@ -437,6 +471,10 @@ export function PsdTemplatesSettingsClient({
   );
 
   useEffect(() => {
+    if (templateListErrorMessage) {
+      return;
+    }
+
     if (!templates.length) {
       setSelectedTemplateId(null);
       return;
@@ -445,7 +483,7 @@ export function PsdTemplatesSettingsClient({
     if (!selectedTemplateId || !templates.some((template) => template.id === selectedTemplateId)) {
       setSelectedTemplateId(templates[0].id);
     }
-  }, [selectedTemplateId, templates]);
+  }, [selectedTemplateId, templateListErrorMessage, templates]);
 
   useEffect(() => {
     if (!selectedTemplate) {
@@ -1721,7 +1759,24 @@ export function PsdTemplatesSettingsClient({
               <CardDescription>按品牌查看模板，选择一个模板继续配置槽位。</CardDescription>
             </CardHeader>
             <CardContent className="space-y-3">
-              {isLoading ? (
+              {templateListErrorMessage && templates.length > 0 ? (
+                <div className="flex items-start gap-3 rounded-xl border border-amber-300/30 bg-amber-500/5 p-4 text-sm text-amber-100">
+                  <AlertTriangle className="mt-0.5 h-4 w-4 shrink-0" />
+                  <div className="min-w-0 flex-1">
+                    <div>{`${templateListErrorMessage}，当前先显示上次成功加载的模板列表。`}</div>
+                    <Button
+                      className="mt-3"
+                      onClick={() => void mutate()}
+                      size="sm"
+                      type="button"
+                      variant="outline"
+                    >
+                      重新加载
+                    </Button>
+                  </div>
+                </div>
+              ) : null}
+              {isLoading && templates.length === 0 ? (
                 <div className="space-y-3">
                   {Array.from({ length: 3 }).map((_, index) => (
                     <div

lib/agents/psd-template-renderer.ts

@@ -94,15 +94,6 @@ function sanitizeFileSegment(value: string, fallback: string) {
   return normalized || fallback;
 }
 
-function hasDedicatedRenderBase(template: AgentPsdTemplate) {
-  const renderBaseUrl = String(template.renderBaseUrl || "").trim();
-  const previewUrl = String(template.previewUrl || "").trim();
-  return Boolean(String(template.renderBasePath || "").trim()) || (
-    Boolean(renderBaseUrl) &&
-    renderBaseUrl !== previewUrl
-  );
-}
-
 function resolveTextOverlayFrame(params: {
   layerWidth: number;
   layerHeight: number;
@@ -327,7 +318,6 @@ export async function renderAgentPsdTemplate(params: {
   const canvasHeight = Math.max(1, Math.round(Number(template.height || 1)));
   const remoteBufferCache = new Map<string, Buffer>();
   const fontMap = new Map(fonts.map((font) => [font.id, font]));
-  const shouldUseDedicatedRenderBase = hasDedicatedRenderBase(template);
 
   async function readCachedBuffer(url: string, label = "PSD 模板资源") {
     const normalizedUrl = String(url || "").trim();
@@ -350,7 +340,6 @@ export async function renderAgentPsdTemplate(params: {
   }
 
   const compositeInputs: Array<{ input: Buffer; left: number; top: number }> = [];
-  let didAppendDedicatedRenderBase = false;
 
   async function appendBufferOverlay(params: {
     input: Buffer;
@@ -408,47 +397,8 @@ export async function renderAgentPsdTemplate(params: {
     }
   }
 
-  if (shouldUseDedicatedRenderBase && template.renderBaseUrl) {
-    try {
-      const renderBaseBuffer = await readCachedBuffer(
-        template.renderBaseUrl,
-        "PSD 模板底图"
-      );
-      const normalizedRenderBaseBuffer = await sharp(renderBaseBuffer)
-        .rotate()
-        .resize({
-          width: canvasWidth,
-          height: canvasHeight,
-          fit: "fill",
-          background: {
-            r: 0,
-            g: 0,
-            b: 0,
-            alpha: 0,
-          },
-        })
-        .png()
-        .toBuffer();
-      didAppendDedicatedRenderBase = await appendBufferOverlay({
-        input: normalizedRenderBaseBuffer,
-        left: 0,
-        top: 0,
-        width: canvasWidth,
-        height: canvasHeight,
-      });
-    } catch (error) {
-      console.warn("[PSD Template] failed to load dedicated render base during render:", {
-        templateId: template.id,
-        error,
-      });
-    }
-  }
-
   for (const layer of [...template.layers].reverse()) {
     if (!layer.isEditable) {
-      if (didAppendDedicatedRenderBase) {
-        continue;
-      }
       await appendStoredLayer(layer);
       continue;
     }