Merge design_ui_v2 into design_ui so the new design system can be previewed without dropping later product work.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/web/src/components/pipeline/PipelineColumn.vue

@@ -295,10 +295,10 @@ onBeforeUnmount(() => {
   min-width: 0;
   width: 100%;
   font-size: 0.98rem;
-  font-weight: 800;
+  font-weight: 600;
   color: var(--ink);
   font: inherit;
-  font-weight: 800;
+  font-weight: 600;
 }
 
 .column-head h2 {
@@ -315,7 +315,7 @@ onBeforeUnmount(() => {
   height: 1.7rem;
   padding: 0 0.4rem;
   border: 1px solid var(--line);
-  border-radius: 8px;
+  border-radius: var(--radius);
   background: #fff;
 }
 
@@ -389,7 +389,7 @@ onBeforeUnmount(() => {
   color: var(--ink);
   text-align: right;
   cursor: pointer;
-  border-radius: 8px;
+  border-radius: var(--radius);
 }
 
 .col-menu button:hover:not(:disabled) {