docs(dragon-q8b): add M.2 E Key 2230 slot guide

docs/dragon/q8b/hardware-use/m2-e-key.md

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+
+# M.2 E Key 2230 卡槽
+
+瑞莎 Dragon Q8B 板载 1 个 M.2 E Key 2230 卡槽，可安装 M.2 2230 尺寸的 E Key 无线网卡模组（Wi-Fi + 蓝牙）。
+
+:::tip 接口位置
+可以参考 [硬件信息](./hardware-info) 教程找到对应硬件接口位置（M.2 E Key 插槽）。
+:::
+
+## 硬件连接
+
+1. 断开主板电源。
+2. 将 M.2 E Key 2230 无线网卡模组的金手指以约 30° 斜角插入卡槽。
+3. 按下模组另一端，并用螺丝固定。
+4. 接通电源并启动系统。
+
+系统启动后，可以进入系统设置连接 Wi-Fi，或使用蓝牙进行配对。
+
+## 支持的无线网卡
+
+以下型号已在瑞莎 Dragon Q8B 上完成验证，可正常使用：
+
+| 型号 | 类型 / 芯片 | Wi-Fi | 蓝牙 | 备注 |
+| --- | --- | --- | --- | --- |
+| Foxconn T99H432.12 | NCM865A (WCN7851) | Wi-Fi 7 | BT 5.4 | 蓝牙通过 UART 连接 |
+| Quectel QCNCM865AAMD-865A | NCM865A (WCN7851) | Wi-Fi 7 | BT 5.4 | 蓝牙通过 UART 连接 |
+| Foxconn T99H432.05 | NCM865 (WCN7851) | Wi-Fi 7 | BT 5.4 | 蓝牙通过 USB 连接 |
+| LITE-ON WCBN814A | NFA765A (QCA2066) | Wi-Fi 6E | BT 5.3 | 蓝牙通过 UART 连接<br/>蓝牙音频使用一段时间后可能意外断开，建议使用其他型号 |
+| Foxconn T99H294 U98H139.00 | NFA765 (WCN6856) | Wi-Fi 6E | BT 5.3 | 蓝牙通过 USB 连接 |
+
+:::caution 购买提示
+- 上表为当前已验证支持的型号列表。
+- Realtek / Intel 全系无线网卡暂无可用驱动支持，请勿选购。
+- MediaTek MT7925 / MT7927 可能支持，尚待进一步验证。
+- 如需使用其他型号，建议先联系瑞莎技术支持确认兼容性。
+:::

i18n/en/docusaurus-plugin-content-docs/current/dragon/q8b/hardware-use/m2-e-key.md

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+# M.2 E Key 2230 Slot
+
+The Radxa Dragon Q8B has one onboard M.2 E Key 2230 slot, which can be used to install M.2 2230 E Key wireless network card modules (Wi-Fi + Bluetooth).
+
+:::tip Interface Location
+You can refer to the [Hardware Information](./hardware-info) guide to locate the corresponding hardware interface (M.2 E Key slot).
+:::
+
+## Hardware Connection
+
+1. Disconnect the power supply from the board.
+2. Insert the gold fingers of the M.2 E Key 2230 wireless network card module into the slot at an angle of about 30°.
+3. Press down the other end of the module and secure it with a screw.
+4. Connect the power supply and boot the system.
+
+After the system boots, you can connect to Wi-Fi in the system settings, or use Bluetooth for pairing.
+
+## Supported Wireless Network Cards
+
+The following models have been verified on the Radxa Dragon Q8B:
+
+| Model | Type / Chipset | Wi-Fi | Bluetooth | Notes |
+| --- | --- | --- | --- | --- |
+| Foxconn T99H432.12 | NCM865A (WCN7851) | Wi-Fi 7 | BT 5.4 | Bluetooth over UART |
+| Quectel QCNCM865AAMD-865A | NCM865A (WCN7851) | Wi-Fi 7 | BT 5.4 | Bluetooth over UART |
+| Foxconn T99H432.05 | NCM865 (WCN7851) | Wi-Fi 7 | BT 5.4 | Bluetooth over USB |
+| LITE-ON WCBN814A | NFA765A (QCA2066) | Wi-Fi 6E | BT 5.3 | Bluetooth over UART<br/>Bluetooth audio may disconnect unexpectedly after some time of use; we recommend using other models |
+| Foxconn T99H294 U98H139.00 | NFA765 (WCN6856) | Wi-Fi 6E | BT 5.3 | Bluetooth over USB |
+
+:::caution Purchase Notes
+- The table above is the list of currently verified supported models.
+- Realtek / Intel series wireless network cards do not have available driver support; please do not purchase them.
+- MediaTek MT7925 / MT7927 may be supported, but are still under further validation.
+- If you want to use other models, please contact Radxa technical support to confirm compatibility before purchasing.
+:::