조직도 기능 추가

backend/internal/handler/tenant_handler.go

@@ -739,6 +739,36 @@ func (h *TenantHandler) RemoveOwner(c *fiber.Ctx) error {
 	return c.SendStatus(fiber.StatusNoContent)
 }
 
+func (h *TenantHandler) DeleteTenantsBulk(c *fiber.Ctx) error {
+	var req struct {
+		IDs []string `json:"ids"`
+	}
+	if err := c.BodyParser(&req); err != nil {
+		return errorJSON(c, fiber.StatusBadRequest, "invalid request body")
+	}
+
+	if len(req.IDs) == 0 {
+		return errorJSON(c, fiber.StatusBadRequest, "no IDs provided")
+	}
+
+	// Permission check: Super Admin can delete anything. 
+	// Tenant Admin should theoretically only delete manageable sub-tenants, 
+	// but currently bulk delete is intended for Super Admin.
+	profile, _ := c.Locals("user_profile").(*domain.UserProfileResponse)
+	if profile == nil || domain.NormalizeRole(profile.Role) != domain.RoleSuperAdmin {
+		return errorJSON(c, fiber.StatusForbidden, "only super admin can perform bulk deletion")
+	}
+
+	if err := h.Service.DeleteTenantsBulk(c.Context(), req.IDs); err != nil {
+		return errorJSON(c, fiber.StatusInternalServerError, err.Error())
+	}
+
+	return c.Status(fiber.StatusOK).JSON(fiber.Map{
+		"message": "Tenants deleted successfully",
+		"count":   len(req.IDs),
+	})
+}
+
 func mapTenantSummary(t domain.Tenant) tenantSummary {
 	domains := make([]string, 0, len(t.Domains))
 	for _, d := range t.Domains {