Add notification inbox, toasts and alert scanner for orders, prints and filament

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

app/Models/AlertState.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * Remembers what the alert scanner has already seen so each event notifies once.
+ */
+class AlertState extends Model
+{
+    public $incrementing = false;
+
+    protected $primaryKey = 'key';
+
+    protected $keyType = 'string';
+
+    protected $fillable = ['key', 'state'];
+
+    protected function casts(): array
+    {
+        return ['state' => 'array'];
+    }
+
+    /**
+     * @return array<string, mixed>|null
+     */
+    public static function read(string $key): ?array
+    {
+        return static::find($key)?->state;
+    }
+
+    /**
+     * @param  array<string, mixed>  $state
+     */
+    public static function write(string $key, array $state): void
+    {
+        static::updateOrCreate(['key' => $key], ['state' => $state]);
+    }
+}