ui-default: init

将ui-default合并至主存储库便于维护

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

@@ -0,0 +1,73 @@
+.page--problem_edit
+  .widget--category-filter
+    &__category
+      margin-bottom: rem(6px)
+
+      &-tag
+        display: inline-block
+        padding: rem(5px 6px)
+
+        &:hover
+          color: #FFF
+          background: $primary-color
+          text-decoration: none
+
+        &.selected
+          color: #FFF
+          background: $secondary-color
+
+    &__drop
+      position: relative
+      font-size: rem($font-size-small)
+      width: rem(170px)
+      padding: rem(10px)
+      margin-right: rem(10px)
+      background: $menu-drop-bg-color
+      box-shadow: $menu-drop-shadow
+
+      &:before
+        content: ''
+        display: block
+        position: absolute
+        width: 0
+        height: 0
+        border: rem($menu-drop-triangle-size) solid transparent
+        border-top-color: #FFF
+        border-left-color: #FFF
+        box-shadow: $menu-drop-triangle-shadow
+        transform: rotate(135deg)
+        transform-origin: 0 0
+        pointer-events: none
+        left: 100%
+        top: 50%
+        margin-left: rem(floor($menu-drop-triangle-size * 1.414))
+
+    &__subcategory
+      margin: rem(2px)
+      display: inline-block
+
+      &-tag
+        display: inline-block
+        padding: rem(5px 6px)
+
+        &:hover
+          color: #FFF
+          background: $primary-color
+          text-decoration: none
+
+        &.selected
+          color: #FFF
+          background: $secondary-color
+
+  .drop-target-attached-right .widget--category-filter__drop
+    margin-right: 0
+    margin-left: rem(10px)
+
+    &:before
+      transform-origin: 100% 0
+      transform: rotate(-45deg)
+      left: auto
+      right: 100%
+      margin-left: 0
+      margin-right: 0
+      margin-top: rem(floor($menu-drop-triangle-size * -1.414))