diff --git a/app/api/canvas/generate/image/route.ts b/app/api/canvas/generate/image/route.ts
index 9b19e28c0..d51b21610 100644
--- a/app/api/canvas/generate/image/route.ts
+++ b/app/api/canvas/generate/image/route.ts
@@ -26,6 +26,10 @@ function toGenerateImagePayload(body: GenerateImageRequest): CanvasGenerateImage
       typeof body.aspectRatio === "string" && body.aspectRatio.trim()
         ? body.aspectRatio.trim()
         : "1:1",
+    imageSize:
+      typeof body.imageSize === "string" && body.imageSize.trim()
+        ? body.imageSize.trim()
+        : undefined,
     imageCount:
       typeof body.imageCount === "number" && Number.isFinite(body.imageCount)
         ? body.imageCount
diff --git a/components/canvas/CanvasChatPanel.tsx b/components/canvas/CanvasChatPanel.tsx
index 11c2af1c3..c9de01e87 100644
--- a/components/canvas/CanvasChatPanel.tsx
+++ b/components/canvas/CanvasChatPanel.tsx
@@ -343,6 +343,7 @@ type CanvasImageGenerationRequest = {
   prompt: string;
   model?: string;
   aspectRatio?: string;
+  imageSize?: string;
   imageCount?: number;
   negativePrompt?: string;
   referenceImage?: string;
@@ -4162,6 +4163,7 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
             prompt: promptOverride,
             model: modelForGeneration,
             aspectRatio: "9:16",
+            imageSize: imageParams.imageSize,
             imageCount: 1,
             negativePrompt: imageParams.negativePrompt,
             referenceImage: productAttachments[0]?.url,
@@ -4421,6 +4423,7 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
           prompt: reviewPrompt,
           model: modelForGeneration,
           aspectRatio: "1:1",
+          imageSize: imageParams.imageSize,
           imageCount: DETAIL_REVIEW_IMAGE_COUNT,
           negativePrompt: imageParams.negativePrompt,
           referenceImage: productAttachments[0]?.url,
@@ -4770,6 +4773,7 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
           prompt: reviewPrompt,
           model: modelForGeneration,
           aspectRatio: "1:1",
+          imageSize: imageParams.imageSize,
           imageCount: DETAIL_REVIEW_IMAGE_COUNT,
           negativePrompt: imageParams.negativePrompt,
           referenceImage: productAttachments[0]?.url,
diff --git a/lib/ai/providers/ruxa-image.ts b/lib/ai/providers/ruxa-image.ts
index 8fc706c81..dac1de838 100644
--- a/lib/ai/providers/ruxa-image.ts
+++ b/lib/ai/providers/ruxa-image.ts
@@ -75,13 +75,21 @@ function normalizeOutputFormat(outputFormat?: string): "png" | "jpg" {
 }
 
 function extractTaskId(payload: any): string | undefined {
+  if (typeof payload === "string" && payload.trim()) {
+    return payload.trim();
+  }
+  if (typeof payload?.data === "string" && payload.data.trim()) {
+    return payload.data.trim();
+  }
   return (
     payload?.taskId ||
     payload?.task_id ||
     payload?.id ||
+    payload?.task?.id ||
     payload?.data?.taskId ||
     payload?.data?.task_id ||
-    payload?.data?.id
+    payload?.data?.id ||
+    payload?.data?.task?.id
   );
 }
 
@@ -110,6 +118,15 @@ function extractErrorMessage(payload: any): string {
   );
 }
 
+function compactPayloadSnippet(payload: any): string {
+  try {
+    const json = JSON.stringify(payload);
+    return json.length > 320 ? `${json.slice(0, 320)}...` : json;
+  } catch {
+    return String(payload || "");
+  }
+}
+
 function extractPromptAndImages(messages: Array<{ role: string; content: any }>) {
   const lastUserMessage = messages.filter((message) => message.role === "user").pop();
   if (!lastUserMessage) {
@@ -347,34 +364,46 @@ export function createRuxaImage({ apiKey, baseURL }: RuxaImageConfig) {
         const activeModelId = options.overrideModelId || modelId;
 
         const createEndpoint = joinApiPath(baseURL, "/api/v1/tasks/create");
+        const callbackUrl = process.env.RUXA_CALLBACK_URL?.trim();
+        const requestBody = {
+          input: {
+            prompt,
+            image_input: imageUrls,
+            aspect_ratio: aspectRatio,
+            resolution,
+            output_format: outputFormat,
+          },
+          model: activeModelId,
+          ...(callbackUrl ? { callBackUrl: callbackUrl } : {}),
+        };
         const createResponse = await fetch(createEndpoint, {
           method: "POST",
           headers: {
             Authorization: `Bearer ${apiKey}`,
             "Content-Type": "application/json",
           },
-          body: JSON.stringify({
-            input: {
-              prompt,
-              image_input: imageUrls,
-              aspect_ratio: aspectRatio,
-              resolution,
-              output_format: outputFormat,
-            },
-            model: activeModelId,
-          }),
+          body: JSON.stringify(requestBody),
         });
-
-        const createPayload = await createResponse.json();
+        const createRawText = await createResponse.text();
+        let createPayload: any = null;
+        try {
+          createPayload = JSON.parse(createRawText);
+        } catch {
+          createPayload = createRawText;
+        }
         if (!createResponse.ok) {
-          throw new Error(extractErrorMessage(createPayload));
+          throw new Error(
+            `${extractErrorMessage(createPayload)} (HTTP ${createResponse.status})`
+          );
         }
 
         let outputUrls = filterSourceImages(collectImageUrls(createPayload), imageUrls);
         if (outputUrls.length === 0) {
           const taskId = extractTaskId(createPayload);
           if (!taskId) {
-            throw new Error("RUXA 创建任务成功，但未返回 taskId");
+            throw new Error(
+              `RUXA 创建任务成功，但未返回 taskId，响应片段: ${compactPayloadSnippet(createPayload)}`
+            );
           }
           outputUrls = await waitForTaskResult(baseURL, apiKey, taskId, imageUrls);
         }
diff --git a/lib/canvas/generate-image.ts b/lib/canvas/generate-image.ts
index dbb6b0344..c2ede07fa 100644
--- a/lib/canvas/generate-image.ts
+++ b/lib/canvas/generate-image.ts
@@ -12,6 +12,7 @@ export interface CanvasGenerateImageRequest {
   negativePrompt?: string;
   model?: string;
   aspectRatio?: string;
+  imageSize?: string;
   imageCount?: number;
   referenceImage?: string;
   referenceImages?: string[];
@@ -80,6 +81,10 @@ export async function generateCanvasImage(
     typeof request.aspectRatio === "string" && request.aspectRatio.trim()
       ? request.aspectRatio.trim()
       : "1:1";
+  const imageSize =
+    typeof request.imageSize === "string" && request.imageSize.trim()
+      ? request.imageSize.trim()
+      : "2K";
   const imageCount =
     typeof request.imageCount === "number" && Number.isFinite(request.imageCount)
       ? Math.max(1, Math.min(8, Math.floor(request.imageCount)))
@@ -180,7 +185,7 @@ export async function generateCanvasImage(
 
   const imageParams = {
     aspectRatio,
-    imageSize: "2K",
+    imageSize,
     imageCount,
     negativePrompt,
   };