Add support page, admin features, and auth hardening.

Rename public affiliate route to /support with localized nav labels, and include affiliate/social/wallpaper admin, 2FA login, and related site updates.

Co-authored-by: Cursor <cursoragent@cursor.com>

Models/classes/AdminSocialIconVM.cs

@@ -0,0 +1,22 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace atakanozbancom.Models.classes
+{
+    public class AdminSocialIconVM
+    {
+        public int id { get; set; }
+
+        [Display(Name = "Icon (Font Awesome class)")]
+        [Required(ErrorMessage = "Icon class is required.")]
+        [StringLength(100)]
+        public string icon { get; set; }
+
+        [Display(Name = "URL")]
+        [Required(ErrorMessage = "URL is required.")]
+        [StringLength(500)]
+        public string url { get; set; }
+
+        [Display(Name = "Sort Order")]
+        public int sort_order { get; set; }
+    }
+}