修复主题一些细节优化问题

themes/Ying/layouts/_default/_markup/render-image.html

@@ -14,4 +14,6 @@
     {{- $src = $src | relURL -}}
   {{- end -}}
 {{- end -}}
-<img src="{{ $src }}" alt="{{ $alt }}" class="lazyload lazy-loaded" loading="lazy" decoding="async"{{ with $width }} width="{{ . }}"{{ end }}{{ with $height }} height="{{ . }}"{{ end }}>
+<span class="sen-image-frame sen-media-host"{{ with $alt }} data-title="{{ . }}"{{ end }}>
+  <img src="{{ $src }}" alt="{{ $alt }}"{{ with $alt }} title="{{ . }}"{{ end }} class="lazyload lazy-loaded" loading="lazy" decoding="async"{{ with $width }} width="{{ . }}"{{ end }}{{ with $height }} height="{{ . }}"{{ end }}>
+</span>