iter(g115): 新增月历组件 calendar

packages/skin/ui/ui.css

@@ -3826,3 +3826,99 @@ button.ua-step-dot:hover {
   outline: 2px solid var(--ua-color-accent);
   outline-offset: 2px;
 }
+
+/* —— 月历 —— */
+.ua-calendar {
+  display: inline-block;
+  min-width: 252px;
+  padding: var(--ua-space-3);
+  border: 1px solid var(--ua-color-border);
+  border-radius: var(--ua-radius-md);
+  background: var(--ua-color-bg);
+}
+.ua-calendar-head {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: var(--ua-space-2);
+}
+.ua-calendar-label {
+  color: var(--ua-color-text);
+  font-size: var(--ua-font-size-md);
+  font-weight: 500;
+}
+.ua-calendar-nav {
+  width: 24px;
+  height: 24px;
+  padding: 0;
+  border: none;
+  border-radius: var(--ua-radius-sm);
+  background: none;
+  color: var(--ua-color-text-muted);
+  cursor: pointer;
+  transition: color 0.15s, background-color 0.15s;
+}
+.ua-calendar-nav:hover {
+  color: var(--ua-color-accent);
+  background: color-mix(in srgb, var(--ua-color-accent) 8%, transparent);
+}
+.ua-calendar-nav:focus-visible {
+  outline: 2px solid var(--ua-color-accent);
+  outline-offset: 1px;
+}
+.ua-calendar-week,
+.ua-calendar-grid {
+  display: grid;
+  grid-template-columns: repeat(7, 1fr);
+  gap: 2px;
+}
+.ua-calendar-week {
+  margin-bottom: var(--ua-space-1);
+  color: var(--ua-color-text-muted);
+  font-size: var(--ua-font-size-sm);
+  text-align: center;
+}
+.ua-calendar-day {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 1px;
+  padding: 4px 0;
+  border: none;
+  border-radius: var(--ua-radius-sm);
+  background: none;
+  color: var(--ua-color-text);
+  font-size: var(--ua-font-size-md);
+  cursor: pointer;
+  transition: background-color 0.15s, color 0.15s, transform 0.15s;
+}
+.ua-calendar-day:hover {
+  background: color-mix(in srgb, var(--ua-color-accent) 8%, transparent);
+  transform: translateY(-1px);
+}
+.ua-calendar-day.is-today {
+  box-shadow: inset 0 0 0 1px var(--ua-color-border); /* 今天只用细内框，不与选中态抢视觉 */
+}
+.ua-calendar-day.is-selected {
+  background: color-mix(in srgb, var(--ua-color-accent) 10%, transparent);
+  color: var(--ua-color-accent);
+  font-weight: 500;
+  transform: none;
+}
+.ua-calendar-day:focus-visible {
+  outline: 2px solid var(--ua-color-accent);
+  outline-offset: 1px;
+}
+.ua-calendar-mark {
+  color: var(--ua-color-text-muted);
+  font-size: 10px;
+  line-height: 1;
+}
+@media (prefers-reduced-motion: reduce) {
+  .ua-calendar-day {
+    transition: none;
+  }
+  .ua-calendar-day:hover {
+    transform: none;
+  }
+}