ErrorView und ErrorViewModel hinzugefügt; ContactLink als Singleton konfiguriert, serialisiert aus appSettings

EnvelopeGenerator.Web/Models/ContactLink.cs

@@ -0,0 +1,60 @@
+namespace EnvelopeGenerator.Web.Models
+{
+    /// <summary>
+    /// Represents a hyperlink for contact purposes with various HTML attributes.
+    /// </summary>
+    public class ContactLink
+    {
+        /// <summary>
+        /// Gets or sets the label of the hyperlink.
+        /// </summary>
+        public string Label { get; init; } = "Contact";
+
+        /// <summary>
+        /// Gets or sets the URL that the hyperlink points to.
+        /// </summary>
+        public string Href { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Gets or sets the target where the hyperlink should open.
+        /// Commonly used values are "_blank", "_self", "_parent", "_top".
+        /// </summary>
+        public string Target { get; set; } = "_blank";
+
+        /// <summary>
+        /// Gets or sets the relationship of the linked URL as space-separated link types.
+        /// Examples include "nofollow", "noopener", "noreferrer".
+        /// </summary>
+        public string Rel { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Gets or sets the filename that should be downloaded when clicking the hyperlink.
+        /// This attribute will only have an effect if the href attribute is set.
+        /// </summary>
+        public string Download { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Gets or sets the language of the linked resource. Useful when linking to
+        /// content in another language.
+        /// </summary>
+        public string HrefLang { get; set; } = "en";
+
+        /// <summary>
+        /// Gets or sets the MIME type of the linked URL. Helps browsers to handle
+        /// the type correctly when the link is clicked.
+        /// </summary>
+        public string Type { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Gets or sets additional information about the hyperlink, typically viewed
+        /// as a tooltip when the mouse hovers over the link.
+        /// </summary>
+        public string Title { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Gets or sets an identifier for the hyperlink, unique within the HTML document.
+        /// </summary>
+        public string Id { get; set; } = string.Empty;
+    }
+
+}

EnvelopeGenerator.Web/Models/ErrorViewModel.cs

@@ -2,8 +2,10 @@ namespace EnvelopeGenerator.Web.Models
 {
     public class ErrorViewModel
     {
-        public string? RequestId { get; set; }
+        public string Title { get; init; } = "404";
 
-        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+        public string Subtitle { get; init; } = "Hmmm...";
+
+        public string Body { get; init; } = "It looks like one of the developers fell asleep";
     }
 }