Wire seller push notifications with FCM, inbox API, and payment milestones.

Sellers get instant payment alerts on Android; withdrawals respect payout prefs.

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

app/Models/User.php

@@ -19,13 +19,17 @@ class User extends Authenticatable
     /** @use HasFactory<UserFactory> */
     use HasApiTokens, HasFactory, Notifiable;
 
-    protected $fillable = ['public_id', 'name', 'email', 'avatar_url', 'password'];
+    protected $fillable = ['public_id', 'name', 'email', 'avatar_url', 'password', 'last_app_active_at'];
 
     protected $hidden = ['password', 'remember_token'];
 
     protected function casts(): array
     {
-        return ['email_verified_at' => 'datetime', 'password' => 'hashed'];
+        return [
+            'email_verified_at' => 'datetime',
+            'last_app_active_at' => 'datetime',
+            'password' => 'hashed',
+        ];
     }
 
     public function memberships(): HasMany
@@ -63,6 +67,11 @@ class User extends Authenticatable
         return $this->hasOne(QrSetting::class);
     }
 
+    public function pushTokens(): HasMany
+    {
+        return $this->hasMany(UserPushToken::class);
+    }
+
     public function getOrCreateQrSetting(): QrSetting
     {
         return $this->qrSetting()->firstOrCreate([]);