fix: some bugs

app/api/upload/git/route.ts

@@ -108,9 +108,11 @@ export async function POST(req: NextRequest) {
     const isModel = MODEL_EXTENSIONS.has(ext)
 
     if (isModel) {
-      // Model: always re-push since compression makes size comparison unreliable
+      // Model: always re-push since compression makes size comparison unreliable.
+      // Mark as 'unchanged' for the commit message when the folder already exists,
+      // because we can't know if the model really changed after Blender compression.
       const remoteSize = remoteFileMap.get(filename.toLowerCase())
-      fileChanges.set(filename.toLowerCase(), remoteSize === undefined ? 'new' : 'changed')
+      fileChanges.set(filename.toLowerCase(), remoteSize === undefined ? 'new' : 'unchanged')
       changedFilesToPush.push(f)
     } else {
       // Texture: compare by size