feat: add tenant admin invite management, ledger overview, order details, and order management features

- Implemented Invite management with creation, searching, and disabling functionalities.
- Added Ledger overview for financial transactions with filtering options.
- Developed Order Detail view for individual order insights and refund capabilities.
- Created Orders management page with search, reset, and pagination features.
- Enhanced user experience with toast notifications for actions and error handling.

backend/app/http/web/dto/auth.go

@@ -0,0 +1,16 @@
+package dto
+
+// LoginForm 平台侧用户登录表单（用于获取 JWT 访问凭证）。
+// 注意：此登录是“用户身份”登录（非超级管理员），用于进入租户管理后台前的身份校验与租户列表查询。
+type LoginForm struct {
+	// Username 用户名；必须与数据库 users.username 精确匹配。
+	Username string `json:"username,omitempty"`
+	// Password 明文密码；后端会与 users.password 的 bcrypt hash 做比对。
+	Password string `json:"password,omitempty"`
+}
+
+// LoginResponse 登录响应。
+type LoginResponse struct {
+	// Token JWT 访问令牌；前端应以 `Authorization: Bearer <token>` 方式携带。
+	Token string `json:"token"`
+}