fix: 统计图标强制尺寸 + 公告侧栏等高

- stat-item i 添加 min-width/min-height/flex-shrink:0 防止圆形被压缩
- card-sidebar 添加 align-self:stretch 强制与产品卡等高

clientarea/home/hgcloud_home/css/home.css

@@ -109,7 +109,8 @@
 
 /* 圆形图标背景 */
 .stat-item i {
-  width: 36px; height: 36px; border-radius: 50%;
+  width: 36px !important; height: 36px !important; min-width: 36px !important; min-height: 36px !important;
+  border-radius: 50%; flex-shrink: 0 !important;
   display: flex !important; align-items: center !important; justify-content: center !important;
   font-size: 18px;
 }
@@ -252,7 +253,7 @@
 .empty-state p { font-size: 13px; color: var(--text-tertiary); margin-bottom: 14px; }
 .empty-state .el-button { padding: 8px 22px; font-size: 14px; border: none; background: var(--accent); color: #fff; border-radius: 999px; }
 
-/* 侧栏 35% */
+/* 侧栏 35% — 与产品卡等高 */
 .card-sidebar {
   flex: 2 !important;
   min-width: 0 !important;
@@ -260,6 +261,7 @@
   display: flex !important;
   flex-direction: column !important;
   gap: 20px !important;
+  align-self: stretch !important;
 }
 .sidebar-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
 .sidebar-header > span:first-child { font-size: 14px; font-weight: 600; color: var(--text-primary); }