style: 为后台导航栏图标添加悬停动画效果

src/routes/admin/+layout.svelte

@@ -66,7 +66,7 @@
 				<div class="nav-group">
 					<a
 						href={resolve('/admin')}
-						class="nav-item {$page.url.pathname === '/admin' ? 'active' : ''}"
+						class="nav-item nav-dashboard {$page.url.pathname === '/admin' ? 'active' : ''}"
 					>
 						<LayoutDashboard size={18} />
 						<span>仪表盘</span>
@@ -77,7 +77,7 @@
 					<div class="nav-group-title">创作库</div>
 					<a
 						href={resolve('/admin/posts')}
-						class="nav-item {$page.url.pathname === '/admin/posts' ? 'active' : ''}"
+						class="nav-item nav-posts {$page.url.pathname === '/admin/posts' ? 'active' : ''}"
 					>
 						<FileText size={18} />
 						<span>全部{$page.data.aliases?.post || '文章'}</span>
@@ -85,7 +85,7 @@
 
 					<a
 						href={resolve('/admin/pages')}
-						class="nav-item {$page.url.pathname.startsWith('/admin/pages') &&
+						class="nav-item nav-pages {$page.url.pathname.startsWith('/admin/pages') &&
 						$page.url.pathname !== '/admin/pages/new'
 							? 'active'
 							: ''}"
@@ -99,21 +99,25 @@
 					<div class="nav-group-title">集合与归类</div>
 					<a
 						href={resolve('/admin/categories')}
-						class="nav-item {$page.url.pathname.startsWith('/admin/categories') ? 'active' : ''}"
+						class="nav-item nav-categories {$page.url.pathname.startsWith('/admin/categories')
+							? 'active'
+							: ''}"
 					>
 						<FolderTree size={18} />
 						<span>{$page.data.aliases?.category || '分类'}目录</span>
 					</a>
 					<a
 						href={resolve('/admin/series')}
-						class="nav-item {$page.url.pathname.startsWith('/admin/series') ? 'active' : ''}"
+						class="nav-item nav-series {$page.url.pathname.startsWith('/admin/series')
+							? 'active'
+							: ''}"
 					>
 						<Library size={18} />
 						<span>专题{$page.data.aliases?.series || '系列'}</span>
 					</a>
 					<a
 						href={resolve('/admin/tags')}
-						class="nav-item {$page.url.pathname.startsWith('/admin/tags') ? 'active' : ''}"
+						class="nav-item nav-tags {$page.url.pathname.startsWith('/admin/tags') ? 'active' : ''}"
 					>
 						<Tags size={18} />
 						<span>{$page.data.aliases?.tag || '标签'}库</span>
@@ -124,7 +128,9 @@
 					<div class="nav-group-title">资源库</div>
 					<a
 						href={resolve('/admin/files')}
-						class="nav-item {$page.url.pathname.startsWith('/admin/files') ? 'active' : ''}"
+						class="nav-item nav-files {$page.url.pathname.startsWith('/admin/files')
+							? 'active'
+							: ''}"
 					>
 						<ImageIcon size={18} />
 						<span>媒体与文件</span>
@@ -136,13 +142,15 @@
 		<div class="sidebar-footer">
 			<a
 				href={resolve('/admin/settings')}
-				class="site-link {$page.url.pathname.startsWith('/admin/settings') ? 'active' : ''}"
+				class="site-link link-settings {$page.url.pathname.startsWith('/admin/settings')
+					? 'active'
+					: ''}"
 				title="站点设置"
 			>
 				<Settings size={15} aria-hidden="true" />
 				<span>站点设置</span>
 			</a>
-			<a href={resolve('/')} target="_blank" class="site-link" title="访问前台">
+			<a href={resolve('/')} target="_blank" class="site-link link-frontend" title="访问前台">
 				<ExternalLink size={15} aria-hidden="true" />
 				<span>访问前台</span>
 			</a>
@@ -426,6 +434,88 @@
 		}
 	}
 
+	/* --- 图标 Hover 动画 --- */
+	.nav-item :global(svg),
+	.site-link :global(svg) {
+		transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
+	}
+
+	/* 仪表盘: 弹性脉冲 */
+	@keyframes pulse-icon {
+		0%,
+		100% {
+			transform: scale(1);
+		}
+		50% {
+			transform: scale(1.15);
+		}
+	}
+	.nav-item.nav-dashboard:hover :global(svg) {
+		animation: pulse-icon 0.4s ease-in-out;
+		transform: scale(1.1); /* 停留在略大状态 */
+	}
+
+	/* 全部文章: 书页点头 */
+	.nav-item.nav-posts:hover :global(svg) {
+		transform-origin: bottom center;
+		transform: rotate(10deg);
+	}
+
+	/* 独立页面: 窗口悬浮 */
+	.nav-item.nav-pages:hover :global(svg) {
+		transform: translateY(-3px);
+	}
+
+	/* 分类目录: 层级延展 */
+	.nav-item.nav-categories:hover :global(svg) {
+		transform: translateX(3px) scale(1.05);
+	}
+
+	/* 专题系列: 书架倾斜 */
+	.nav-item.nav-series:hover :global(svg) {
+		transform-origin: bottom left;
+		transform: rotate(8deg);
+	}
+
+	/* 标签库: 挂件摇摆 */
+	@keyframes swing-icon {
+		0%,
+		100% {
+			transform: rotate(0);
+		}
+		25% {
+			transform: rotate(15deg);
+		}
+		75% {
+			transform: rotate(-10deg);
+		}
+	}
+	.nav-item.nav-tags:hover :global(svg) {
+		transform-origin: top left;
+		animation: swing-icon 0.6s ease-in-out;
+		transform: rotate(5deg);
+	}
+
+	/* 媒体与文件: 相框聚焦 */
+	.nav-item.nav-files:hover :global(svg) {
+		transform: scale(1.15);
+	}
+
+	/* 站点设置: 齿轮运转 */
+	@keyframes spin-icon {
+		100% {
+			transform: rotate(360deg);
+		}
+	}
+	.site-link.link-settings:hover :global(svg) {
+		animation: spin-icon 2s linear infinite;
+	}
+
+	/* 访问前台: 离站飞出 */
+	.site-link.link-frontend:hover :global(svg) {
+		transform: translate(2px, -2px);
+	}
+
 	.sidebar-overlay {
 		position: fixed;
 		top: 0;