fix: resolve PHPStan static analysis warnings

app/Models/Ticket.php

@@ -3,7 +3,25 @@
 namespace App\Models;
 
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 
+/**
+ * App\Models\Ticket
+ *
+ * @property int $id
+ * @property int $user_id 用户ID
+ * @property string $subject 工单主题
+ * @property string|null $level 工单等级
+ * @property int $status 工单状态
+ * @property int|null $reply_status 回复状态
+ * @property int|null $last_reply_user_id 最后回复人
+ * @property int $created_at
+ * @property int $updated_at
+ * 
+ * @property-read User $user 关联的用户
+ * @property-read \Illuminate\Database\Eloquent\Collection<int, TicketMessage> $messages 关联的工单消息
+ */
 class Ticket extends Model
 {
     protected $table = 'v2_ticket';
@@ -21,16 +39,21 @@ class Ticket extends Model
         self::STATUS_CLOSED => '关闭'
     ];
 
-    public function user()
+    public function user(): BelongsTo
     {
         return $this->belongsTo(User::class, 'user_id', 'id');
     }
-    public function messages()
+    
+    /**
+     * 关联的工单消息
+     */
+    public function messages(): HasMany
     {
         return $this->hasMany(TicketMessage::class, 'ticket_id', 'id');
     }
+    
     // 即将删除
-    public function message()
+    public function message(): HasMany
     {
         return $this->hasMany(TicketMessage::class, 'ticket_id', 'id');
     }