enh: image prompt enhancer

backend/open_webui/constants.py

@@ -113,6 +113,7 @@ class TASKS(str, Enum):
     TAGS_GENERATION = "tags_generation"
     EMOJI_GENERATION = "emoji_generation"
     QUERY_GENERATION = "query_generation"
+    IMAGE_PROMPT_GENERATION = "image_prompt_generation"
     AUTOCOMPLETE_GENERATION = "autocomplete_generation"
     FUNCTION_CALLING = "function_calling"
     MOA_RESPONSE_GENERATION = "moa_response_generation"