ui-default: init

将ui-default合并至主存储库便于维护

packages/ui-default/pages/discussion_main.page.styl

@@ -0,0 +1,37 @@
+.page--discussion_main,
+.page--discussion_node,
+.page--user_detail
+  .discussion__item
+    border-left: rem(5px) solid transparent
+    padding-left: rem(5px)
+
+    &.highlight
+      border-left: rem(5px) solid $highlight-color
+
+  .discussion__title
+    font-size: rem($font-size-title)
+    line-height: 1.2em
+    margin-bottom: rem(10px)
+
+    a:visited
+      color: lighten($text-1-color, 60%)
+
+  .discussion__replies
+    width: rem(70px)
+
+  .discussion-node__bg
+    height: 0
+    box-sizing: content-box
+    padding-bottom: 40%
+    background-size: cover
+    background-position: left center
+    background-repeat: no-repeat
+
+    for id in 'qa' 'share' 'vijos' 'solution' 'advice'
+      &.{id}
+        background-image: url('./discussion_node_bg/nodes_' + id + '.png')
+        +retina()
+          background-image: url('./discussion_node_bg/nodes@2x_' + id + '.png')
+
+    +below(rupture.desktop-cutoff)
+      display: none