Fix wrong logic for sensitive media blur

src/components/status.jsx

@@ -2245,7 +2245,7 @@ function Status({
                 {!previewMode &&
                   (sensitive || filterInfo?.action === 'blur') &&
                   !!mediaAttachments.length &&
-                  (readingExpandMedia === 'show_all' ||
+                  (readingExpandMedia !== 'show_all' ||
                     filterInfo?.action === 'blur') && (
                     <button
                       class={`plain spoiler-media-button ${