Add project variants and UI updates

internal/handlers/export.go

@@ -66,7 +66,7 @@ func (h *ExportHandler) ExportCSV(c *gin.Context) {
 		// Try to load project name from database
 		username := middleware.GetUsername(c)
 		if project, err := h.projectService.GetByUUID(req.ProjectUUID, username); err == nil && project != nil {
-			projectName = project.Name
+			projectName = derefString(project.Name)
 		}
 	}
 	if projectName == "" {
@@ -90,6 +90,13 @@ func (h *ExportHandler) ExportCSV(c *gin.Context) {
 	}
 }
 
+func derefString(value *string) string {
+	if value == nil {
+		return ""
+	}
+	return *value
+}
+
 func (h *ExportHandler) buildExportData(req *ExportRequest) *services.ExportData {
 	items := make([]services.ExportItem, len(req.Items))
 	var total float64
@@ -171,7 +178,7 @@ func (h *ExportHandler) ExportConfigCSV(c *gin.Context) {
 	projectName := config.Name // fallback: use config name if no project
 	if config.ProjectUUID != nil && *config.ProjectUUID != "" {
 		if project, err := h.projectService.GetByUUID(*config.ProjectUUID, username); err == nil && project != nil {
-			projectName = project.Name
+		projectName = derefString(project.Name)
 		}
 	}