iter: d05 新增面包屑 breadcrumb 组件

packages/skin/ui/ui.css

@@ -384,6 +384,51 @@
   background: var(--ua-color-border);
 }
 
+/* —— 面包屑 —— */
+.ua-breadcrumb {
+  font-size: var(--ua-font-size-md);
+}
+.ua-crumb-list {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: var(--ua-space-2);
+  margin: 0;
+  padding: 0;
+  list-style: none;
+}
+.ua-crumb-item {
+  display: inline-flex;
+  align-items: center;
+  gap: var(--ua-space-2);
+}
+.ua-crumb-link {
+  padding: 0;
+  border: none;
+  background: none;
+  color: var(--ua-color-accent);
+  font-size: inherit;
+  text-decoration: none;
+  cursor: pointer;
+  transition: opacity 0.15s;
+}
+.ua-crumb-link:hover {
+  opacity: 0.75;
+  text-decoration: underline;
+}
+.ua-crumb-link:focus-visible {
+  outline: none;
+  border-radius: var(--ua-radius-sm);
+  box-shadow: 0 0 0 3px color-mix(in srgb, var(--ua-color-accent) 18%, transparent);
+}
+.ua-crumb-current {
+  color: var(--ua-color-text-muted);
+}
+.ua-crumb-sep {
+  color: var(--ua-color-text-muted);
+  opacity: 0.6;
+}
+
 /* —— 折叠面板 —— */
 .ua-accordion {
   display: flex;
@@ -953,6 +998,7 @@
   .ua-acc-head,
   .ua-acc-caret,
   .ua-acc-body,
+  .ua-crumb-link,
   .ua-switch-track,
   .ua-switch-thumb,
   .ua-tab,