Updated the proostekrant to work properly again.

src/ProostenKrant/Models/Article.cs

@@ -0,0 +1,42 @@
+namespace ProostenKrant.Models;
+
+public class Article
+{
+    public int Id { get; set; }
+    public string Title { get; set; } = "";
+    public string Content { get; set; } = "";
+    public int AuthorId { get; set; }
+    public string AuthorName { get; set; } = "";
+    public string? SeasonName { get; set; }
+    public string? Participants { get; set; }
+    public DateTime? EventDate { get; set; }
+    public int? SeasonId { get; set; }
+    public string? ArticleImage { get; set; }
+    public string Status { get; set; } = "draft";
+    public DateTime CreatedAt { get; set; }
+
+    public List<int> ParticipantIds
+    {
+        get
+        {
+            if (string.IsNullOrWhiteSpace(Participants))
+            {
+                return new List<int>();
+            }
+            var parts = Participants.Split(',', StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries);
+            var ids = new List<int>();
+            foreach (var p in parts)
+            {
+                if (int.TryParse(p, out var id))
+                {
+                    ids.Add(id);
+                }
+            }
+            return ids;
+        }
+    }
+
+    public string? WebImage => string.IsNullOrEmpty(ArticleImage)
+        ? null
+        : $"/{ArticleImage.TrimStart('/')}";
+}

src/ProostenKrant/Models/Season.cs

@@ -0,0 +1,19 @@
+namespace ProostenKrant.Models;
+
+public class Season
+{
+    public int Id { get; set; }
+    public string Name { get; set; } = "";
+    public string? Description { get; set; }
+    public DateTime StartDate { get; set; }
+    public DateTime EndDate { get; set; }
+    public bool IsActive { get; set; } = true;
+
+    public string CssKey => Name.ToLowerInvariant() switch
+    {
+        "lente" => "lente",
+        "zomer" => "zomer",
+        "herfst" => "herfst",
+        _ => "winter"
+    };
+}

src/ProostenKrant/Models/User.cs

@@ -0,0 +1,10 @@
+namespace ProostenKrant.Models;
+
+public class User
+{
+    public int Id { get; set; }
+    public string Username { get; set; } = "";
+    public string DisplayName { get; set; } = "";
+    public string? ProfileImage { get; set; }
+    public bool IsActive { get; set; } = true;
+}