完全移除模块级权限系统，迁移至接口级权限

后端：
- 删除 StudyRolePermission 模型和 project_permissions API 文件
- 重写 project_permissions.py core，移除所有模块级权限函数
- 重写 permission_cache.py，移除模块级权限缓存逻辑
- 新增权限模板功能（PermissionTemplate 模型、API、服务层）
- 新增 permission_templates 数据库迁移
- 迁移 8 个模块（attachments、audit_logs、dashboard、faqs、
  faq_categories、fees_attachments、knowledge_notes、
  material_equipments、overview、subject_histories、subject_pds）
  至接口级权限检查
- 删除所有模块级权限相关测试文件，新增权限模板测试

前端：
- 删除 ProjectPermissions.vue 和 ProjectPermissionsModule.vue
- 重写 projectRoutePermissions.ts，改为基于接口级权限格式
- 更新 store/study.ts、router/index.ts、AuditLogs.vue、Projects.vue
  中的权限 API 调用，从 fetchProjectRolePermissions 改为
  fetchApiEndpointPermissions
- 清理 types/api.ts 中的旧模块级权限类型定义
- 新增 PermissionTemplateSelector.vue 组件
- 更新权限管理页面，移除模块级权限 tab

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/views/admin/ApiPermissions.test.ts

@@ -1,4 +1,4 @@
-import { describe, it, expect, beforeEach, vi } from "vitest";
+import { describe, it, expect, beforeEach } from "vitest";
 import { mount } from "@vue/test-utils";
 import ApiPermissions from "@/views/admin/ApiPermissions.vue";
 import { createPinia, setActivePinia } from "pinia";
@@ -12,7 +12,6 @@ describe("ApiPermissions.vue", () => {
     const wrapper = mount(ApiPermissions, {
       global: {
         stubs: {
-          ProjectPermissionsModule: true,
           ApiEndpointPermissions: true,
           PermissionMonitoring: true,
         },
@@ -23,11 +22,10 @@ describe("ApiPermissions.vue", () => {
     expect(wrapper.find(".permission-title h2").text()).toBe("权限管理");
   });
 
-  it("renders three tabs", () => {
+  it("renders tabs", () => {
     const wrapper = mount(ApiPermissions, {
       global: {
         stubs: {
-          ProjectPermissionsModule: true,
           ApiEndpointPermissions: true,
           PermissionMonitoring: true,
         },
@@ -35,14 +33,13 @@ describe("ApiPermissions.vue", () => {
     });
 
     const tabs = wrapper.findAll(".el-tabs__nav-item");
-    expect(tabs.length).toBeGreaterThanOrEqual(3);
+    expect(tabs.length).toBeGreaterThanOrEqual(2);
   });
 
   it("has save button disabled when not dirty", () => {
     const wrapper = mount(ApiPermissions, {
       global: {
         stubs: {
-          ProjectPermissionsModule: true,
           ApiEndpointPermissions: true,
           PermissionMonitoring: true,
         },