diff --git a/app/api/canvas/local-edit/route.ts b/app/api/canvas/local-edit/route.ts
index 2dd419f70..0eb22276e 100644
--- a/app/api/canvas/local-edit/route.ts
+++ b/app/api/canvas/local-edit/route.ts
@@ -3710,6 +3710,9 @@ function buildScaleAdjustPatchPrompt(
       "Clean local image edit for a cropped workspace.",
       `Return one clean realistic crop with the same framing and aspect as input image 1. This crop maps to full-photo pixels left=${patchReference.workspacePixelRect.left}, top=${patchReference.workspacePixelRect.top}, width=${patchReference.workspacePixelRect.width}, height=${patchReference.workspacePixelRect.height}.`,
       "Input image 1 is the rough target draft. The selected subject is already placed at the requested final size and position; keep that final footprint.",
+      structureLockedDraft
+        ? "Structure lock: treat the selected subject pixels in input image 1 as the locked product/person layer. AI work is limited to background completion, boundary blending, occlusion, lighting, contact shadows, and removing rough draft artifacts. Do not repaint the product/person interior."
+        : "",
       includeSourceReference
         ? "Input image 2 is the original clean crop for background texture, lighting, perspective, and non-target objects only. Do not restore the selected subject to its old size."
         : "",
@@ -3732,6 +3735,9 @@ function buildScaleAdjustPatchPrompt(
     firstInputRole,
     secondInputRole,
     cropLines,
+    structureLockedDraft
+      ? "Structure lock: treat the selected subject pixels in input image 1 as the locked product/person layer. AI work is limited to background completion, boundary blending, occlusion, lighting, contact shadows, and removing rough draft artifacts. Do not repaint or redesign the target subject interior."
+      : "",
     "Only edit the selected target subject inside the search area. The target subject can be a person/model/child/body part, furniture, product, or another movable object. Keep the crop borders, wall, window frame, floor, rug, sofa, lamps, decor, lighting, camera perspective, and all non-target subjects stable.",
     "If the selected target is a person, scale the whole visible person/body coherently to the final footprint while preserving identity, face, pose, anatomy, hand shape, hair, clothing, and natural human proportions. If a person appears outside the selected target, preserve that non-target person without resizing or redrawing them.",
     "When the final footprint is smaller, the selected subject must clearly shrink; erase the old larger subject footprint outside the final footprint and replace it with natural background/floor/rug/wall/shadow that matches the original crop.",
@@ -4170,9 +4176,7 @@ export async function POST(request: NextRequest) {
         : [];
     const scaleAdjustProtectedRegions =
       isScaleAdjustOperation && scaleAdjustPatchReference
-        ? scaleAdjustPatchReference.structureLockedDraft
-          ? [scaleAdjustPatchReference.workspaceRect]
-          : scaleAdjustProtectedChangeRegions
+        ? scaleAdjustProtectedChangeRegions
         : scaleAdjustCompositeRegions;
     const scaleAdjustVerificationConfig = isScaleAdjustOperation
       ? {
@@ -4386,12 +4390,8 @@ export async function POST(request: NextRequest) {
             featherMaxPx: 42,
             featherMinPx: 10,
             featherRatio: 0.018,
-            maskMode: scaleAdjustPatchReference.structureLockedDraft
-              ? "workspace"
-              : "diff",
-            regions: scaleAdjustPatchReference.structureLockedDraft
-              ? undefined
-              : scaleAdjustPatchCompositeRegions,
+            maskMode: "diff",
+            regions: scaleAdjustPatchCompositeRegions,
             sourceImageUrl,
             workspaceRegion: scaleAdjustPatchReference.workspaceRect,
           }
diff --git a/components/agents/AgentGenerationWorkspaceDarkV2.tsx b/components/agents/AgentGenerationWorkspaceDarkV2.tsx
index 6561e0bde..a21973f1d 100644
--- a/components/agents/AgentGenerationWorkspaceDarkV2.tsx
+++ b/components/agents/AgentGenerationWorkspaceDarkV2.tsx
@@ -764,7 +764,7 @@ type DirectDetailReviewResult = {
 };
 
 const AGENT_IMAGE_TASK_POLL_INTERVAL_MS = 1600;
-const AGENT_IMAGE_TASK_TIMEOUT_MS = 10 * 60 * 1000;
+const AGENT_IMAGE_TASK_TIMEOUT_MS = 15 * 60 * 1000;
 const AGENT_DETAIL_IMAGE_PARALLEL_WORKER_COUNT = 4;
 
 function sleep(ms: number) {
diff --git a/components/canvas/CanvasChatPanel.tsx b/components/canvas/CanvasChatPanel.tsx
index a482b60f6..2e48a2353 100644
--- a/components/canvas/CanvasChatPanel.tsx
+++ b/components/canvas/CanvasChatPanel.tsx
@@ -796,7 +796,7 @@ const CANVAS_AGENT_SECTION_TITLES = new Set([
   "输出设置",
 ]);
 const CANVAS_IMAGE_TASK_POLL_INTERVAL_MS = 1600;
-const CANVAS_IMAGE_TASK_TIMEOUT_MS = 10 * 60 * 1000;
+const CANVAS_IMAGE_TASK_TIMEOUT_MS = 15 * 60 * 1000;
 const CANVAS_GENERATION_NODE_GAP = 56;
 const CANVAS_GENERATION_STACK_GAP = 28;
 const CANVAS_GENERATION_COLLISION_GAP = 32;
diff --git a/lib/canvas/image-task-queue.ts b/lib/canvas/image-task-queue.ts
index 600d830af..d8bf5d916 100644
--- a/lib/canvas/image-task-queue.ts
+++ b/lib/canvas/image-task-queue.ts
@@ -58,7 +58,9 @@ interface QueueState {
   draining: boolean;
 }
 
-const STALE_RUNNING_MS = 5 * 60 * 1000;
+const DEFAULT_RUNNING_TIMEOUT_MS = 10 * 60 * 1000;
+const SCALE_ADJUST_RUNNING_TIMEOUT_MS = 15 * 60 * 1000;
+const LOCAL_ACTIVE_RUNNING_HARD_TIMEOUT_MS = 30 * 60 * 1000;
 const PENDING_LOOKAHEAD_LIMIT = 100;
 const QUEUE_STATUS_PENDING_LOOKAHEAD_LIMIT = 500;
 const QUEUE_STATUS_RECENT_SAMPLE_LIMIT = 120;
@@ -98,6 +100,29 @@ function normalizeTaskModelKey(request: unknown) {
   return normalizeCanvasImageModelKey(rawModel);
 }
 
+function getRecord(value: unknown): Record<string, unknown> | null {
+  return value && typeof value === "object" && !Array.isArray(value)
+    ? (value as Record<string, unknown>)
+    : null;
+}
+
+function getCanvasImageRunningTimeoutMs(request: unknown) {
+  const record = getRecord(request);
+  const debugMeta = getRecord(record?.debugMeta);
+  const debugLabel = String(record?.debugLabel || "");
+  const operation = String(debugMeta?.operation || "");
+  const isScaleAdjust =
+    debugLabel === "canvas-scale-adjust" ||
+    operation === "scale-adjust" ||
+    Boolean(debugMeta?.scaleAdjustPatchWorkflowApplied) ||
+    Boolean(debugMeta?.scaleAdjustPatchForcedForShrink) ||
+    Boolean(record?.scaleAdjustPatchComposite);
+
+  return isScaleAdjust
+    ? SCALE_ADJUST_RUNNING_TIMEOUT_MS
+    : DEFAULT_RUNNING_TIMEOUT_MS;
+}
+
 function isStyleProTaskRequest(request: unknown): request is StyleProTaskRequest {
   return Boolean(
     request &&
@@ -599,8 +624,16 @@ export async function getCanvasImageTaskForUser(params: {
   if (!task) return null;
 
   if (task.status === "running" && task.startedAt) {
-    const staleBefore = new Date(Date.now() - STALE_RUNNING_MS);
-    if (task.startedAt < staleBefore) {
+    const now = Date.now();
+    const runningAgeMs = now - task.startedAt.getTime();
+    const runningTimeoutMs = getCanvasImageRunningTimeoutMs(task.request);
+    const locallyRunning = getQueueState().running.has(task.id);
+    const shouldMarkStale =
+      runningAgeMs >= runningTimeoutMs &&
+      (!locallyRunning || runningAgeMs >= LOCAL_ACTIVE_RUNNING_HARD_TIMEOUT_MS);
+
+    if (shouldMarkStale) {
+      const staleBefore = new Date(now - runningTimeoutMs);
       const timeoutMessage = "图片生成任务已超时，请重新发起生成";
       const completedAt = new Date();
       const [timedOutTask] = await db