From c0f376c4cffc1ea320a983c120fb01e1f57cd448 Mon Sep 17 00:00:00 2001
From: 134 <a134@134deMacBook-Pro.local>
Date: Sun, 5 Jul 2026 14:23:41 +0800
Subject: [PATCH] fix: erase old footprint in scale guide

---
 app/api/canvas/local-edit/route.ts | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/app/api/canvas/local-edit/route.ts b/app/api/canvas/local-edit/route.ts
index e6e3488e0..e4c06ba9d 100644
--- a/app/api/canvas/local-edit/route.ts
+++ b/app/api/canvas/local-edit/route.ts
@@ -3188,6 +3188,18 @@ async function buildScaleAdjustVisualLayoutGuideBuffer(params: {
       if (structureLockAppliedRef) {
         structureLockAppliedRef.value = true;
       }
+      if (structureLockedComposite.method === "rect-crop-guide" && sourceRaw) {
+        sourceFootprintBoxes.push({
+          ...placement.sourceFootprintBox,
+          background: estimateScaleAdjustBoxBackground({
+            box: placement.sourceFootprintBox,
+            raw: sourceRaw,
+            width: sourceWidth,
+          }),
+          innerOpacity: 0.7,
+          opacity: 0.88,
+        });
+      }
       subjectWashComposites.push(structureLockedComposite.wash);
       if (structureLockedComposite.compositeClip) {
         compositeClipComposites.push(structureLockedComposite.compositeClip);
@@ -5029,7 +5041,7 @@ export async function POST(request: NextRequest) {
         scaleAdjustPromptStrategy: isScaleAdjustOperation
             ? scaleAdjustPatchReference
               ? useScaleAdjustFullFrameStructurePatch
-              ? "full-frame-source-locked-target-guide-v8-one-shot"
+              ? "full-frame-source-locked-target-guide-v9-erased-old-footprint-one-shot"
               : scaleAdjustPatchReference.structureLockedDraft
               ? "ai-patch-workspace-structure-locked-draft-v87-subject-alpha-clipped-one-shot"
               : "ai-patch-workspace-draft-v75-soft-wipe-erase-ghost-one-shot"