修复后台表查询筛选与分页

使用单次哨兵查询统一计算扫描范围、匹配总数和截断状态
增加完整候选集服务端排序与越界页码钳制
增加固定分页栏、扫描上限提示和后端排序交互
补充大表响应边界文档与前后端回归测试

apps/admin-web/src/styles/admin.css

@@ -1220,6 +1220,30 @@ button:disabled {
   max-width: 112px;
 }
 
+.admin-database-tables-page {
+  padding-bottom: calc(var(--admin-database-pagination-height, 68px) + 16px);
+}
+
+.admin-database-pagination {
+  position: fixed;
+  right: 0;
+  bottom: 0;
+  left: 232px;
+  z-index: 18;
+  justify-content: space-between;
+  border-top: 1px solid #eaded2;
+  background: rgba(255, 255, 255, 0.96);
+  box-shadow: 0 -8px 24px rgba(112, 57, 30, 0.08);
+  padding: 12px 24px calc(12px + env(safe-area-inset-bottom));
+  backdrop-filter: blur(10px);
+}
+
+.admin-database-pagination-info {
+  color: #755a49;
+  font-size: 13px;
+  font-weight: 700;
+}
+
 .admin-table-sort-button {
   display: inline-flex;
   align-items: center;
@@ -1588,6 +1612,20 @@ button:disabled {
     backdrop-filter: blur(10px);
   }
 
+  .admin-database-pagination {
+    right: 0;
+    bottom: var(--admin-bottom-nav-height, 64px);
+    left: 0;
+    padding: 10px 14px;
+  }
+
+  .admin-database-tables-page {
+    padding-bottom: calc(
+      var(--admin-bottom-nav-height, 64px) +
+        var(--admin-database-pagination-height, 58px) + 16px
+    );
+  }
+
   .admin-bottom-nav-button {
     display: grid;
     gap: 4px;
@@ -1604,6 +1642,18 @@ button:disabled {
   }
 }
 
+@media (max-width: 360px) {
+  .admin-database-pagination .admin-secondary-button {
+    width: 38px;
+    min-width: 38px;
+    padding: 0;
+  }
+
+  .admin-database-pagination .admin-secondary-button span {
+    display: none;
+  }
+}
+
 @media (max-width: 560px) {
   .admin-login-panel,
   .admin-panel {
@@ -1660,4 +1710,29 @@ button:disabled {
   .admin-icon-button span {
     display: none;
   }
+
+  .admin-database-pagination,
+  .admin-database-pagination .admin-action-row {
+    flex-wrap: nowrap;
+  }
+
+  .admin-database-pagination {
+    gap: 8px;
+    padding: 10px;
+  }
+
+  .admin-database-pagination .admin-action-row {
+    gap: 6px;
+  }
+
+  .admin-database-pagination .admin-secondary-button {
+    gap: 4px;
+    min-height: 38px;
+    padding: 0 8px;
+  }
+
+  .admin-database-pagination-info {
+    font-size: 12px;
+    white-space: nowrap;
+  }
 }