[FEAT] 優化帳號管理授權顯示邏輯與 UI 樣式一致性

database/factories/Machine/MachineFactory.php

@@ -17,6 +17,7 @@ class MachineFactory extends Factory
             'status' => fake()->randomElement(['online', 'offline', 'error']),
             'temperature' => fake()->randomFloat(2, 2, 10),
             'firmware_version' => 'v' . fake()->randomElement(['1.0.0', '1.1.2', '2.0.1']),
+            'serial_no' => 'SN-' . strtoupper(fake()->unique()->bothify('??###?')),
             'last_heartbeat_at' => fake()->dateTimeBetween('-1 day', 'now'),
         ];
     }