feat: add task lifecycle management and improve generation reliability

Centralize timeout policies, stall detection, and error classification
for image/video/text generation tasks. Improve ecommerce OSS upload flow
and add script evaluation enhancements.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/features/canvas/canvasUtils.ts

@@ -251,7 +251,7 @@ export function blobToDataUrl(blob: Blob) {
 
 export async function waitForImageTaskResult(taskId: string, onStatus?: (status: AiTaskStatus) => void) {
   const resultUrl = await waitForTask(taskId, {
-    timeoutMs: 10 * 60 * 1000,
+    kind: "image",
     onProgress: (e) => {
       onStatus?.({ taskId, status: e.status, progress: e.progress, resultUrl: e.resultUrl ?? undefined, error: e.error ?? undefined } as AiTaskStatus);
     },
@@ -262,7 +262,7 @@ export async function waitForImageTaskResult(taskId: string, onStatus?: (status:
 
 export async function waitForVideoTaskResult(taskId: string, onStatus?: (status: AiTaskStatus) => void) {
   const resultUrl = await waitForTask(taskId, {
-    timeoutMs: 30 * 60 * 1000,
+    kind: "video",
     onProgress: (e) => {
       onStatus?.({ taskId, status: e.status, progress: e.progress, resultUrl: e.resultUrl ?? undefined, error: e.error ?? undefined } as AiTaskStatus);
     },
@@ -495,4 +495,4 @@ export function getWorkflowNodeFocusSelection(node: WebCanvasWorkflow["nodes"][n
     height: clampCanvasPercent(height),
     ratio: toCanvasStyleString(selection.ratio, "16:9"),
   };
-}
+}