message: fix(notebook): support anki favicon data uri
diff: @@ -397,7 +397,9 @@ function cardText(front: boolean, nf: string[]) {
  {{#${nf[6]}}}
  <section class="tsource">
  <hr />
  -{{#${nf[8]}}}<img src="{{${nf[8]}}}" />{{/${nf[8]}}}
  +{{#${nf[8]}}}
  +<span class="favicon" style="background-image:url({{${nf[8]}}})"></span>
  +{{/${nf[8]}}}
  <a href="{{${nf[7]}}}">{{${nf[6]}}}</a>
  </section>
  {{/${nf[6]}}}
  @@ -472,5 +474,12 @@ section {
  color: #fff;
  background: #7C8A99;
  }
  +
  +.favicon {
  + display: inline-block;
  + width: 1em;
  + height: 1em;
  + background: center/cover no-repeat;
  +}
  `
  }
  