feat(integrations): align notion authorization

internal/handler/api/v1/notion_integration_handler.go

@@ -20,6 +20,23 @@ func NewNotionIntegrationHandler(svc *service.NotionIntegrationService) *NotionI
 	return &NotionIntegrationHandler{svc: svc}
 }
 
+// Authorization creates a Notion OAuth authorization URL.
+// POST /api/v1/accounts/:account_id/notion/authorization
+func (h *NotionIntegrationHandler) Authorization(c *gin.Context) {
+	accountID, err := parseUintParam(c, "account_id")
+	if err != nil {
+		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid account_id")
+		return
+	}
+
+	result, svcErr := h.svc.BuildAuthorizationURL(accountID)
+	if svcErr != nil {
+		c.JSON(http.StatusUnprocessableEntity, gin.H{"success": false})
+		return
+	}
+	c.JSON(http.StatusOK, result)
+}
+
 // Delete removes a Notion integration for an account.
 // DELETE /api/v1/accounts/:account_id/integrations/notion
 func (h *NotionIntegrationHandler) Delete(c *gin.Context) {