fix: emphasize active sidebar labels and dim other labels on hover

src/App.vue

@@ -349,7 +349,8 @@ const menuOptions = computed<MenuOption[]>(() => {
     display: inline-block;
     transition:
         transform 0.2s ease,
-        color 0.18s ease;
+        color 0.18s ease,
+        opacity 0.18s ease;
 }
 .admin-brand {
     @apply flex shrink-0 items-center gap-3 h-[74px] overflow-hidden py-0 px-5 text-ink whitespace-nowrap;
@@ -457,6 +458,27 @@ const menuOptions = computed<MenuOption[]>(() => {
     .admin-sider.is-collapsed .admin-settings-button:is(:hover, :focus-visible) .admin-settings-label {
         color: var(--admin-nav-hover-color);
     }
+    /* 选中或悬停时强化菜单名称，禁用项不响应悬停。 */
+    .admin-sider.is-collapsed .n-menu-item-content--selected .admin-menu-label,
+    .admin-sider.is-collapsed
+        .n-menu-item-content:not(.n-menu-item-content--disabled):is(:hover, :has(:focus-visible))
+        .admin-menu-label,
+    .admin-sider.is-collapsed .admin-settings-button:is(:hover, :focus-visible) .admin-settings-label {
+        font-weight: 600;
+    }
+    /* 悬停未选中入口时，整列其余名称淡化；移开后恢复原有颜色与选中态。 */
+    .admin-sider.is-collapsed:has(
+            .n-menu-item-content:not(.n-menu-item-content--disabled, .n-menu-item-content--selected):hover
+        )
+        .n-menu-item-content:not(:hover)
+        .admin-menu-label,
+    .admin-sider.is-collapsed:has(
+            .n-menu-item-content:not(.n-menu-item-content--disabled, .n-menu-item-content--selected):hover
+        )
+        .admin-settings-label,
+    .admin-sider.is-collapsed:has(.admin-settings-button:hover) .admin-menu-label {
+        opacity: 0.55;
+    }
     /* 选中、悬停背景仅落在图标轨道内。 */
     .admin-sider.is-collapsed .n-menu .n-menu-item-content::before {
         right: calc(var(--admin-nav-reveal-width) - var(--admin-sider-collapsed));