refactor: 简化仪表盘布局

- 删除快捷链接侧边栏
- 删除快捷操作区域
- 删除服务状态区域
- 导航链接移到顶部导航栏
- 保留核心状态监控卡片

static/css/dashboard.css

@@ -76,6 +76,38 @@ body {
     color: var(--text-primary);
 }
 
+/* 快捷导航栏 */
+.quick-nav {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+}
+
+.nav-btn {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    padding: 8px 14px;
+    background: rgba(255, 255, 255, 0.9);
+    border: none;
+    border-radius: 20px;
+    font-size: 14px;
+    font-weight: 500;
+    color: #333;
+    text-decoration: none;
+    transition: all 0.3s ease;
+}
+
+[data-theme="dark"] .nav-btn {
+    background: rgba(45, 55, 72, 0.9);
+    color: #e2e8f0;
+}
+
+.nav-btn:hover {
+    transform: translateY(-2px);
+    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
+}
+
 .nav-user {
     display: flex;
     align-items: center;