show error when no selected file to import

src/locales/en.json

@@ -1571,6 +1571,7 @@
     "Alipay (Web) Transaction Flow File": "Alipay (Web) Transaction Flow File",
     "WeChat Pay Billing File": "WeChat Pay Billing File",
     "Data File": "Data File",
+    "Please select a file to import": "Please select a file to import",
     "No data to import": "No data to import",
     "Cannot import invalid transactions": "Cannot import invalid transactions",
     "Unable to parse import file": "Unable to parse import file",

src/locales/es.json

@@ -1571,6 +1571,7 @@
     "Alipay (Web) Transaction Flow File": "Archivo de flujo de transacciones de Alipay (web)",
     "WeChat Pay Billing File": "Archivo de facturación de pago de WeChat",
     "Data File": "Archivo de datos",
+    "Please select a file to import": "Please select a file to import",
     "No data to import": "No hay datos para importar",
     "Cannot import invalid transactions": "No se pueden importar transacciones no válidas",
     "Unable to parse import file": "No se puede analizar el archivo de importación",

src/locales/ru.json

@@ -1571,6 +1571,7 @@
     "Alipay (Web) Transaction Flow File": "Файл потока транзакций Alipay (веб)",
     "WeChat Pay Billing File": "Файл выставления счетов WeChat Pay",
     "Data File": "Файл данных",
+    "Please select a file to import": "Please select a file to import",
     "No data to import": "Нет данных для импорта",
     "Cannot import invalid transactions": "Невозможно импортировать недействительные транзакции",
     "Unable to parse import file": "Не удалось обработать файл импорта",

src/locales/vi.json

@@ -1571,6 +1571,7 @@
     "Alipay (Web) Transaction Flow File": "Tệp luồng giao dịch Alipay (Web)",
     "WeChat Pay Billing File": "Tệp thanh toán WeChat Pay",
     "Data File": "Tệp dữ liệu",
+    "Please select a file to import": "Please select a file to import",
     "No data to import": "Không có dữ liệu để nhập",
     "Cannot import invalid transactions": "Không thể nhập giao dịch không hợp lệ",
     "Unable to parse import file": "Không thể phân tích tệp nhập",

src/locales/zh_Hans.json

@@ -1571,6 +1571,7 @@
     "Alipay (Web) Transaction Flow File": "支付宝 (网页版) 交易流水文件",
     "WeChat Pay Billing File": "微信支付账单文件",
     "Data File": "数据文件",
+    "Please select a file to import": "请选择要导入的文件",
     "No data to import": "没有可以导入的数据",
     "Cannot import invalid transactions": "不能导入无效的交易",
     "Unable to parse import file": "无法解析导入的文件",

src/views/desktop/transactions/list/dialogs/ImportDialog.vue

@@ -1493,6 +1493,7 @@ function setImportFile(event: Event): void {
 
 function parseData(): void {
     if (!importFile.value) {
+        snackbar.value?.showError('Please select a file to import');
         return;
     }