## ADDED Requirements

### Requirement: Device Batch Series Binding Range Allocation Hint Formatting

The device batch series binding dialog SHALL render its derived device-range allocation-count hint using decimal thousands separators.

The displayed count MUST continue to map to the same accepted numeric range as `virtual_no_end - virtual_no_start + 1`.

#### Scenario: Format device batch series binding range count with thousands separators

- **GIVEN** 用户打开“批量设置设备套餐系列绑定”对话框
- **AND** 用户选择 `selection_type="range"`
- **WHEN** 用户输入一个有效设备号范围，且派生数量为 `1000`
- **THEN** 对话框 MUST 显示 `共分配1,000台设备`
- **AND** 对话框 MUST NOT 显示未分组的 `共分配1000台设备`
- **AND** 当任一端点变化时，格式化后的数量 MUST 立即更新
