style: 优化后台管理界面样式与导航栏显示效果

src/lib/components/admin/ArticleOutline.svelte

@@ -35,7 +35,6 @@
 	.article-outline {
 		min-width: 0;
 	}
-	.count,
 	.empty {
 		margin: 0 0 12px;
 		color: var(--text-muted);

src/routes/admin/+layout.svelte

@@ -181,7 +181,7 @@
 <ConfirmDialog />
 
 <!-- Floating Controllers (VOID style) -->
-{#if $page.url.pathname.includes('/new') || $page.url.pathname.includes('/settings') || /\/admin\/(posts|pages)\/[^\/]+$/.test($page.url.pathname)}
+{#if $page.url.pathname.includes('/new') || $page.url.pathname.includes('/settings') || /\/admin\/(posts|pages)\/[^/]+$/.test($page.url.pathname)}
 	<aside id="ctrler-panel">
 		<div class="ctrler-item" title="返回顶部">
 			<a
@@ -288,10 +288,10 @@
 		align-items: center;
 		gap: 12px;
 		padding: 8px 24px;
-		color: #b0b0b0; /* TOC text color */
+		color: #b0b0b0; /* 参考 TOC 目录普通状态文字颜色与字重 */
 		text-decoration: none;
 		font-size: 0.95rem;
-		font-weight: 500;
+		font-weight: normal;
 		transition: all 0.2s;
 		position: relative;
 		border-left: 2px solid transparent;
@@ -301,13 +301,15 @@
 		color: var(--accent-color, #419b38);
 		background: rgba(255, 255, 255, 0.03);
 		border-left: 2px solid var(--accent-color, #419b38);
+		opacity: 1;
 	}
 
 	.nav-item.active {
 		color: var(--accent-color, #419b38);
-		font-weight: 700;
+		font-weight: 500;
 		border-left: 2px solid var(--accent-color, #419b38);
 		background: rgba(255, 255, 255, 0.05);
+		opacity: 1;
 	}
 
 	.sidebar-footer {
@@ -334,6 +336,7 @@
 	.site-link:hover,
 	.site-link.active {
 		color: var(--accent-color, #419b38);
+		opacity: 1;
 	}
 
 	.user-email {