fix(scripts): ignore reference images in direct tests

scripts/run_figma_direct_test.sh

@@ -44,6 +44,20 @@ for name in "${!PRESERVED_ENV[@]}"; do
   export "$name=${PRESERVED_ENV[$name]}"
 done
 
+# Direct generation tests should ignore any edit inputs coming from .env.
+for name in \
+  REFERENCE_IMAGE \
+  REFERENCE_IMAGE_FILE \
+  REFERENCE_IMAGE_URL \
+  REFERENCE_IMAGE_DATA_URL \
+  MASK_IMAGE \
+  MASK_IMAGE_FILE \
+  MASK_IMAGE_URL \
+  MASK_IMAGE_DATA_URL
+do
+  export "$name="
+done
+
 unset http_proxy https_proxy all_proxy HTTP_PROXY HTTPS_PROXY ALL_PROXY
 
 export IMAGE_REQUEST_STYLE="${IMAGE_REQUEST_STYLE:-apicodex}"