refactor: 统一项目代码风格并修复多处类型与调用问题

本次提交包含多项优化：
1.  移除大量冗余的文件头注释与过时的from __future__导入
2.  将CRUD的list方法统一重命名为get_list保持接口一致
3.  修复前后端状态字段类型不匹配问题，将string类型status改为number
4.  修正前端文案错别字，将"代办事项"修正为标准写法
5.  更新sqlalchemy版本并调整依赖配置
6.  新增缓存工具类替代fastapi-cache2，重构缓存调用逻辑
7.  新增开源授权函生成相关工具与数据库字段支持
8.  为多个业务模块添加防重复提交loading状态
9.  修复邮件模型的外键关联缺失问题
10. 优化pdf生成工具的导入时机与文档注释

frontend/web/src/views/module_platform/package/index.vue

@@ -35,7 +35,9 @@
             :perm-delete="['module_package:package:delete']"
             :perm-patch="['module_package:package:update']"
             :delete-loading="batchDeleting"
-            @add="handleOpenDialog('create')"
+            :create-loading="createLoading"
+            :more-loading="moreLoading"
+            @add="handleAdd"
             @delete="handleBatchDelete"
             @more="handleMoreClick"
           />
@@ -279,6 +281,9 @@ const pkgSearchItems = computed<SearchFormItem[]>(() => [
 const faTableRef = ref<{ elTableRef?: { clearSelection: () => void } } | null>(null);
 const { selectedIds, batchDeleting, onTableSelectionChange } = useTableSelection<PackageTable>();
 
+const createLoading = ref(false);
+const moreLoading = ref(false);
+
 const opCtx = {
   onDetail: (id: number) => void handleOpenDialog("detail", id),
   onEdit: (id: number) => void handleOpenDialog("update", id),
@@ -591,6 +596,15 @@ const { submitLoading, handleCloseDialog, handleOpenDialog, handleSubmit } =
     onUpdateSuccess: refreshCreate,
   });
 
+async function handleAdd() {
+  createLoading.value = true;
+  try {
+    await handleOpenDialog("create");
+  } finally {
+    createLoading.value = false;
+  }
+}
+
 async function deletePkgRow(id: number) {
   try {
     await confirmDelete();
@@ -606,7 +620,7 @@ async function togglePkgStatus(row: PackageTable) {
   const newStatus = row.status === 0 ? 1 : 0;
   const label = newStatus === 0 ? "启用" : "禁用";
   try {
-    await confirmToggleStatus(label);
+    await confirmToggleStatus(newStatus);
     await PackageAPI.batchPackageStatus({ ids: [row.id!], status: Number(newStatus) });
     ElMessage.success(`${label}成功`);
     await refreshData();