fix: 让聊天对话中图片的变清晰和抠图按钮始终显示

components/image-preview.tsx

@@ -203,9 +203,9 @@ export function ImagePreview({
           onClick={() => setIsOpen(true)}
         />
         
-        {/* 左上角：变清晰和抠图按钮 */}
+        {/* 左上角：变清晰和抠图按钮 - 始终显示 */}
         {(onImageEnhance || onImageRmbg) && (
-          <div className="absolute top-2 left-2 flex gap-1.5 opacity-0 transition-opacity group-hover:opacity-100 z-10">
+          <div className="absolute top-2 left-2 flex gap-1.5 z-10">
             {onImageEnhance && (
               <button
                 className="rounded-full bg-blue-600/90 hover:bg-blue-700 p-2 text-white transition-colors shadow-lg"