prompt update

common.py

@@ -75,6 +75,7 @@ def create_mindma_data_by_openai(content):
 - Analyze the user's question and decompose it into sub-questions.
 - Organize the answers into a mind map structure with no more than 4 levels of nodes.
 - Attach an appropriate emoji directly in the node strings for the first three levels of nodes, ensuring the emojis are directly included in the JSON string in UTF-8 format.
+- The root node does not need an emoji, note that the value of the root node is also in the structure, please be consistent
 - The language of the mind map node should match the user's explicit request or the user's input language (e.g., Chinese for Chinese input, English for English input).
 - Reply with the mind map structure in standard JSON format, ensuring all strings are correctly quoted and the overall format is valid JSON.
 - The total number of nodes should not exceed 60 to maintain clarity and focus.