Fixed input model attributes

ShopAdmin/Components/CreateProduct.razor

@@ -93,6 +93,7 @@
                             <label class="console-field-label">Primary Cover</label>
                             <div class="book-cover-dropzone">
                                 <InputFile OnChange="HandleMainImageUpload" accept=".png,.jpg,.jpeg,.webp" class="hidden-file-input" id="main-image-file" />
+                                <ValidationMessage For="@(() => ProductModel.ImageUrl)" style="color: #ff5722; font-size: 0.75rem;" />
 
                                 @if (string.IsNullOrEmpty(ProductModel.ImageUrl))
                                 {

ShopAdmin/Components/CreateProduct.razor.cs

@@ -8,7 +8,6 @@ public partial class CreateProduct([FromKeyedServices(BookshopBucketName)] IS3Se
     private bool isCalendarOpen = false;
     private DateTime calendarViewingMonth = DateTime.Today;
     private List<DateTime?> calendarDays = new();
-    private string currentCalendarMonthYearText => calendarViewingMonth.ToString("MMMM yyyy");
 
     private readonly CancellationTokenSource cancellationTokenSource = new();
     private CancellationToken cancellationToken;
@@ -189,27 +188,33 @@ public partial class CreateProduct([FromKeyedServices(BookshopBucketName)] IS3Se
 
 public class CreateProductModel
 {
+    [MaxLength(128)]
     [Required(ErrorMessage = "Product name is required.")]
     public string? Name { get; set; }
 
+    [MaxLength(512)]
     [Required(ErrorMessage = "Summary is required.")]
     public string? Summary { get; set; }
 
+    [MaxLength(2048)]
     [Required(ErrorMessage = "Description is required.")]
     public string? Description { get; set; }
 
     [Range(0.01, double.MaxValue, ErrorMessage = "Price must be greater than zero.")]
     public decimal Price { get; set; }
 
+    [MaxLength(128)]
     [Required(ErrorMessage = "Author metadata is required.")]
     public string? Author { get; set; }
 
     [Required(ErrorMessage = "Publication Date is required.")]
     public DateTime PublishDate { get; set; } = DateTime.Today;
 
+    [MaxLength(255)]
     [Required(ErrorMessage = "Copyright Information field is required.")]
     public string? CopyrightInfo { get; set; }
 
+    [MaxLength(128)]
     [Required(ErrorMessage = "ISBN code is required.")]
     [RegularExpression(@"^(?=(?:\D*\d){10}(?:(?:\D*\d){3})?$)[\d-]+$", ErrorMessage = "Please enter a valid ISBN-10 or ISBN-13 string.")]
     public string? Isbn { get; set; }