feat(ai): clean reasoning content from replies

utils/string_utils.py

@@ -22,3 +22,36 @@ def remove_grok_render_tags(text: str) -> str:
     cleaned = re.sub(r'<\s*grok:[^>]+?>[\s\S]*?<\s*/\s*grok:[^>]+?>', '', text, flags=re.IGNORECASE)
     cleaned = re.sub(r'<\s*grok:[^>]+?/?>', '', cleaned, flags=re.IGNORECASE)
     return cleaned
+
+
+def remove_reasoning_content(text: str) -> str:
+    """移除模型返回中的思考/推理内容，仅保留最终可展示结果。"""
+    if not text:
+        return text
+
+    cleaned = text
+
+    # 常见的思考标签
+    cleaned = re.sub(r'<\s*think\s*>[\s\S]*?<\s*/\s*think\s*>', '', cleaned, flags=re.IGNORECASE)
+    cleaned = re.sub(r'<\s*thinking\s*>[\s\S]*?<\s*/\s*thinking\s*>', '', cleaned, flags=re.IGNORECASE)
+    cleaned = re.sub(r'<\s*reasoning\s*>[\s\S]*?<\s*/\s*reasoning\s*>', '', cleaned, flags=re.IGNORECASE)
+
+    # 常见 markdown 思考段落
+    cleaned = re.sub(
+        r'^\s*(#{1,6}\s*)?(思考过程|推理过程|分析过程|reasoning|thinking)\s*[:：]?\s*$[\s\S]*?(?=^\s*(#{1,6}\s*)?\S|\Z)',
+        '',
+        cleaned,
+        flags=re.IGNORECASE | re.MULTILINE
+    )
+
+    # 某些模型会输出“思考内容：...最终答案：...”
+    cleaned = re.sub(
+        r'^\s*(思考内容|思维链|推理过程|分析过程)\s*[:：][\s\S]*?(?=(最终答案|总结|摘要|#|\Z))',
+        '',
+        cleaned,
+        flags=re.IGNORECASE
+    )
+
+    cleaned = remove_grok_render_tags(cleaned)
+    cleaned = re.sub(r'\n{3,}', '\n\n', cleaned).strip()
+    return cleaned