docs: add Swagger annotations to 5 handlers

Add comprehensive Swagger/Swagger comments to:
- export_handler.go (ExportUsers, ImportUsers, GetImportTemplate)
- sms_handler.go (SendCode, LoginByCode)
- sso_handler.go (Authorize, Token, Introspect, Revoke, UserInfo)
- theme_handler.go (8 endpoints)
- webhook_handler.go (5 endpoints)

All 18 handlers now have Swagger annotations.

internal/api/handler/webhook_handler.go

@@ -19,6 +19,19 @@ func NewWebhookHandler(webhookService *service.WebhookService) *WebhookHandler {
 	return &WebhookHandler{webhookService: webhookService}
 }
 
+// CreateWebhook 创建 Webhook
+// @Summary 创建 Webhook
+// @Description 创建新的 Webhook 配置
+// @Tags Webhook管理
+// @Accept json
+// @Produce json
+// @Security BearerAuth
+// @Param request body service.CreateWebhookRequest true "Webhook信息"
+// @Success 201 {object} Response{data=domain.Webhook} "Webhook创建成功"
+// @Failure 400 {object} Response "请求参数错误"
+// @Failure 401 {object} Response "未认证"
+// @Failure 500 {object} Response "服务器错误"
+// @Router /api/v1/webhooks [post]
 func (h *WebhookHandler) CreateWebhook(c *gin.Context) {
 	var req service.CreateWebhookRequest
 	if err := c.ShouldBindJSON(&req); err != nil {
@@ -38,6 +51,19 @@ func (h *WebhookHandler) CreateWebhook(c *gin.Context) {
 	c.JSON(http.StatusCreated, gin.H{"code": 0, "message": "success", "data": webhook})
 }
 
+// ListWebhooks 获取 Webhook 列表
+// @Summary 获取 Webhook 列表
+// @Description 获取当前用户的 Webhook 配置列表
+// @Tags Webhook管理
+// @Accept json
+// @Produce json
+// @Security BearerAuth
+// @Param page query int false "页码" default(1)
+// @Param page_size query int false "每页数量" default(20)
+// @Success 200 {object} Response "Webhook列表"
+// @Failure 401 {object} Response "未认证"
+// @Failure 500 {object} Response "服务器错误"
+// @Router /api/v1/webhooks [get]
 func (h *WebhookHandler) ListWebhooks(c *gin.Context) {
 	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
 	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
@@ -70,6 +96,20 @@ func (h *WebhookHandler) ListWebhooks(c *gin.Context) {
 	})
 }
 
+// UpdateWebhook 更新 Webhook
+// @Summary 更新 Webhook
+// @Description 更新指定 Webhook 的配置
+// @Tags Webhook管理
+// @Accept json
+// @Produce json
+// @Security BearerAuth
+// @Param id path int true "Webhook ID"
+// @Param request body service.UpdateWebhookRequest true "更新信息"
+// @Success 200 {object} Response "更新成功"
+// @Failure 400 {object} Response "请求参数错误"
+// @Failure 401 {object} Response "未认证"
+// @Failure 500 {object} Response "服务器错误"
+// @Router /api/v1/webhooks/{id} [put]
 func (h *WebhookHandler) UpdateWebhook(c *gin.Context) {
 	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
 	if err != nil {
@@ -91,6 +131,18 @@ func (h *WebhookHandler) UpdateWebhook(c *gin.Context) {
 	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "更新成功"})
 }
 
+// DeleteWebhook 删除 Webhook
+// @Summary 删除 Webhook
+// @Description 删除指定的 Webhook 配置
+// @Tags Webhook管理
+// @Produce json
+// @Security BearerAuth
+// @Param id path int true "Webhook ID"
+// @Success 200 {object} Response "删除成功"
+// @Failure 400 {object} Response "请求参数错误"
+// @Failure 401 {object} Response "未认证"
+// @Failure 500 {object} Response "服务器错误"
+// @Router /api/v1/webhooks/{id} [delete]
 func (h *WebhookHandler) DeleteWebhook(c *gin.Context) {
 	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
 	if err != nil {
@@ -106,6 +158,19 @@ func (h *WebhookHandler) DeleteWebhook(c *gin.Context) {
 	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "删除成功"})
 }
 
+// GetWebhookDeliveries 获取 Webhook 投递记录
+// @Summary 获取 Webhook 投递记录
+// @Description 获取指定 Webhook 的最近投递记录
+// @Tags Webhook管理
+// @Produce json
+// @Security BearerAuth
+// @Param id path int true "Webhook ID"
+// @Param limit query int false "返回记录数量" default(20)
+// @Success 200 {object} Response "投递记录列表"
+// @Failure 400 {object} Response "请求参数错误"
+// @Failure 401 {object} Response "未认证"
+// @Failure 500 {object} Response "服务器错误"
+// @Router /api/v1/webhooks/{id}/deliveries [get]
 func (h *WebhookHandler) GetWebhookDeliveries(c *gin.Context) {
 	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
 	if err != nil {