refactor(HomeController): remove culture binding as viewdata; bind via string localizer

EnvelopeGenerator.Application/Services/EmailTemplateService.cs

@@ -36,7 +36,7 @@ public class EmailTemplateService : BasicCRUDService<IEmailTemplateRepository, E
         var temp = await _repository.ReadByNameAsync(type);
         return temp is null 
             ? Result.Fail<EmailTemplateDto>()
-                .Message(Key.InnerServiceError)
+                .Message("InnerServiceError")
                 .Notice(LogLevel.Error, Flag.DataIntegrityIssue, $"EmailTemplateType '{type}' is not found in DB. Please, define required e-mail template.")
             : Result.Success(_mapper.Map<EmailTemplateDto>(temp));
     }