core&ui: add problem_config

Co-authored-by: undefined <i@undefined.moe>

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

@@ -1,4 +1,4 @@
-.page--problem_edit
+.page--problem_edit,.page--problem_create
   .section__tab-header-item
     border-top: 3px solid transparent;
     transition: border-color 0.2s, background 0.2s, color 0.2s;
@@ -10,4 +10,29 @@
       background: #f8f8f8;
     
     &.tab--active
-      border-color: #ed5f82;
+      border-color: #ed5f82;
+
+  .section--problem-sidebar-tags
+    &.collapsed .collapsed--hidden,
+    &.expanded .expanded--hidden
+      display: none
+
+    &.collapsed .problem-sidebar-tags__detail
+      display: none
+
+  .section--problem-sidebar-additional_file
+    .problem-sidebar-additional_file__detail
+      height: 270px
+      overflow-y: auto
+    
+    &.collapsed .collapsed--hidden,
+    &.expanded .expanded--hidden
+      display: none
+
+    &.collapsed .problem-sidebar-additional_file__detail
+      display: none
+
+    .col--size
+      width: 80px
+    .col--operation
+      width: 40px