fix：图标改为base64

src/components/ChatEditor/index.tsx

@@ -414,6 +414,19 @@ const ChatEditorBase: React.FC<ChatEditorProps & WithAuthProps> = ({ checkAuth,
                 await handleToolClick(tool)
             }
 
+            // 处理后端返回的 base64 图标
+            const getToolIconSrc = () => {
+              if (!tool.toolIcon)
+                return ''
+
+              // 已经是完整的 dataURL，直接返回
+              if (typeof tool.toolIcon === 'string' && tool.toolIcon.startsWith('data:image'))
+                return tool.toolIcon
+
+              // 否则默认按 png 的纯 base64 拼接，如有需要可根据后端类型字段动态调整
+              return `data:image/png;base64,${tool.toolIcon}`
+            }
+
             return (
               <Button
                 key={tool.toolId || `tool-${index}`}
@@ -425,7 +438,7 @@ const ChatEditorBase: React.FC<ChatEditorProps & WithAuthProps> = ({ checkAuth,
               >
                 {tool.toolIcon && (
                   <img
-                    src={tool.toolIcon}
+                    src={getToolIconSrc()}
                     className="w-4 h-4 flex-shrink-0"
                   />
                 )}