Check if filename is a guid and replace with menu item name

Author: emericklaw

static/build_theme.html

@@ -866,7 +866,7 @@ <h1>Bruce Theme Builder</h1>
 
                             const baseName = file.name.substring(0, file.name.lastIndexOf(".")) || file.name;
                             const blob = await fetch(imageDataUrl).then(res => res.blob());
-                            const fileName = `${baseName}.${fileExtension}`;
+                            const fileName = isGuid(baseName) ? `${name}.${fileExtension}` : `${baseName}.${fileExtension}`;
                             jsonMapping[name] = fileName;
                             imageFolder.file(fileName, blob);
                             totalProcessed++;
@@ -1026,6 +1026,11 @@ <h1>Bruce Theme Builder</h1>
             });
         }
 
+        function isGuid(str) {
+            const guidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
+            return guidRegex.test(str);
+        }
+
         createFileInputs();
         setupDragAndDrop();
         updateColorDisplay();