Add standalone support ticket system with customer and admin interfaces

Replaces planned SupportPal integration with a built-in ticket system.
Customer side: create tickets, reply, close. Admin side: manage all
tickets with search/filters, staff replies, status updates. Includes
30 Pest tests (144 total, 775 assertions).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

website/app/Models/SupportTicket.php

@@ -7,6 +7,7 @@ namespace App\Models;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 
 class SupportTicket extends Model
 {
@@ -18,9 +19,11 @@ class SupportTicket extends Model
         'subject',
         'status',
         'priority',
+        'department',
         'last_reply_at',
     ];
 
+    /** @return array<string, string> */
     protected function casts(): array
     {
         return [
@@ -33,4 +36,9 @@ class SupportTicket extends Model
     {
         return $this->belongsTo(User::class);
     }
+
+    public function replies(): HasMany
+    {
+        return $this->hasMany(TicketReply::class, 'ticket_id');
+    }
 }

website/app/Models/TicketReply.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class TicketReply extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'ticket_id',
+        'user_id',
+        'body',
+        'is_staff_reply',
+    ];
+
+    /** @return array<string, string> */
+    protected function casts(): array
+    {
+        return [
+            'is_staff_reply' => 'boolean',
+        ];
+    }
+
+    public function ticket(): BelongsTo
+    {
+        return $this->belongsTo(SupportTicket::class, 'ticket_id');
+    }
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+}