fix: S3 UI优化 — 底部弹窗/FAB 安全区适配

client/src/pages/admin/notifications.vue

@@ -586,6 +586,7 @@ onReachBottom(() => {
   border-radius: $radius-2xl $radius-2xl 0 0;
   display: flex;
   flex-direction: column;
+  padding-bottom: env(safe-area-inset-bottom);
 }
 
 .modal-header {

client/src/pages/category-manage/index.vue

@@ -376,7 +376,7 @@ async function onMigrateConfirm() {
 .fab {
   position: fixed;
   right: $space-xl;
-  bottom: 120rpx;
+  bottom: calc(120rpx + env(safe-area-inset-bottom));
   width: 112rpx;
   height: 112rpx;
   background: linear-gradient(135deg, $primary, #E67355);

client/src/pages/group-manage/index.vue

@@ -645,6 +645,7 @@ function handleDissolve(group: Group) {
   display: flex;
   flex-direction: column;
   overflow: hidden;
+  padding-bottom: env(safe-area-inset-bottom);
 }
 
 .modal-header {

client/src/pages/notifications/index.vue

@@ -440,6 +440,7 @@ onReachBottom(() => {
   border-radius: $radius-2xl $radius-2xl 0 0;
   display: flex;
   flex-direction: column;
+  padding-bottom: env(safe-area-inset-bottom);
 }
 
 .detail-header {