docs(nanokvm-go): reorganize sidebar and clarify KVM app updates

Reorganize the Chinese and English NanoKVM Go sidebars:

  - Rename the Development section to System
  - Group system build and image flashing under System
  - Group App installation, development, and AI realtime voice chat under Custom Apps
  - Keep the AI voice quick start and technical guide together

  Rename Update Application to KVM App Update and clarify that it updates the built-in NanoKVM Go KVM application, not
  custom Apps or the system image.

  Update the related MCP troubleshooting text to use the same terminology.

docs/hardware/en/kvm/NanoKVM_Go/mcp.md

@@ -214,7 +214,7 @@ Check:
 
 + Whether the NanoKVM Go system or application version is too old;
 + Whether the current version supports MCP;
-+ Whether the application needs to be updated from the web control page;
++ Whether the KVM App needs to be updated from the web control page;
 + Whether the settings page has been reopened after the update.
 
 ## Security Notes

docs/hardware/en/kvm/NanoKVM_Go/system/updating.md

@@ -1,15 +1,15 @@
 ---
-title: Update Application
+title: KVM App Update
 keywords: NanoKVM Go, Remote desktop, KVM, update
 update:
     - date: 2026-07-15
       version: v0.1
       author: Liang Ziyue
       content:
-          - Add NanoKVM Go application update guide
+          - Add the NanoKVM Go KVM App update guide
 ---
 
-NanoKVM Go supports updating the application from the web control page. Before updating, make sure the device is connected to the network and has obtained an IP address.
+NanoKVM Go supports updating its built-in KVM App from the web control page. The KVM App is the main NanoKVM Go application responsible for web control, video capture, and keyboard and mouse control. It is not a custom App installed from the `Apps` page or the system image. Before updating, make sure the device is connected to the network and has obtained an IP address.
 
 ## Preparation
 
@@ -42,13 +42,13 @@ On the settings page, click `Check for updates`.
 
 If an update is available, a confirmation dialog is displayed. Click `OK` to start the update.
 
-![Confirm the NanoKVM Go application update](../../../../assets/NanoKVM/go/system/nanokvm_go_updating_confirm_update.webp)
+![Confirm the NanoKVM Go KVM App update](../../../../assets/NanoKVM/go/system/nanokvm_go_updating_confirm_update.webp)
 
 ## Wait for the Update to Complete
 
-After clicking OK, keep NanoKVM Go powered on and connected to the network, then wait for the application update to complete.
+After clicking OK, keep NanoKVM Go powered on and connected to the network, then wait for the KVM App update to complete.
 
-![NanoKVM Go application update progress](../../../../assets/NanoKVM/go/system/nanokvm_go_updating_progress.webp)
+![NanoKVM Go KVM App update progress](../../../../assets/NanoKVM/go/system/nanokvm_go_updating_progress.webp)
 
 Do not power off the device during the update, and do not refresh or close the page. After the update is complete, follow the instructions on the page. If the page refreshes automatically or returns to the login page, log in again.
 

docs/hardware/en/sidebar.yaml

@@ -559,7 +559,7 @@ items:
             file: kvm/NanoKVM_Go/resolution.md
         -   label: MCP
             file: kvm/NanoKVM_Go/mcp.md
-        -   label: Update Application
+        -   label: KVM App Update
             file: kvm/NanoKVM_Go/system/updating.md
         -   label: Network
             items:
@@ -569,20 +569,22 @@ items:
                 file: kvm/NanoKVM_Go/network/frp.md
             -   label: Static IP
                 file: kvm/NanoKVM_Go/network/static_ip.md
-        -   label: Development
+        -   label: System
             items:
             -   label: System Build
                 file: kvm/NanoKVM_Go/system/introduction.md
             -   label: Flash Image
                 file: kvm/NanoKVM_Go/system/flashing.md
         -   label: Custom Apps
-            file: kvm/NanoKVM_Go/custom_app.md
-        -   label: AI Realtime Voice Chat
             items:
-            -   label: Quick Start
-                file: kvm/NanoKVM_Go/realtime_voice_bridge.md
-            -   label: Technical Guide
-                file: kvm/NanoKVM_Go/realtime_voice_bridge_technical.md
+            -   label: App Installation and Development
+                file: kvm/NanoKVM_Go/custom_app.md
+            -   label: AI Realtime Voice Chat
+                items:
+                -   label: Quick Start
+                    file: kvm/NanoKVM_Go/realtime_voice_bridge.md
+                -   label: Technical Guide
+                    file: kvm/NanoKVM_Go/realtime_voice_bridge_technical.md
         -   label: FAQ
             file: kvm/NanoKVM_Go/faq.md
     -   label: NanoKVM PCIe

docs/hardware/zh/kvm/NanoKVM_Go/mcp.md

@@ -214,7 +214,7 @@ unset NODE_TLS_REJECT_UNAUTHORIZED
 
 + NanoKVM Go 系统或应用版本是否过旧；
 + 当前版本是否支持 MCP 功能；
-+ 是否需要先在网页控制端中更新应用；
++ 是否需要先在网页控制端中更新 KVM 应用；
 + 更新完成后是否已经重新打开设置页面。
 
 ## 安全注意事项

docs/hardware/zh/kvm/NanoKVM_Go/system/updating.md

@@ -1,15 +1,15 @@
 ---
-title: 更新应用
+title: KVM 应用更新
 keywords: NanoKVM Go, Remote desktop, KVM, update
 update:
     - date: 2026-07-15
       version: v0.1
       author: Liang Ziyue
       content:
-          - 新增 NanoKVM Go 更新应用教程
+          - 新增 NanoKVM Go KVM 应用更新教程
 ---
 
-NanoKVM Go 支持在网页控制端中更新应用。更新前请确保设备已经连接网络，并且已经获得 IP 地址。
+NanoKVM Go 支持在网页控制端中更新内置的 KVM 应用。这里的 KVM 应用是负责网页控制、画面采集和键鼠控制的 NanoKVM Go 主程序，不是从 `Apps` 页面安装的自定义 APP，也不是系统镜像。更新前请确保设备已经连接网络，并且已经获得 IP 地址。
 
 ## 使用前准备
 
@@ -43,13 +43,13 @@ NanoKVM Go 支持在网页控制端中更新应用。更新前请确保设备已
 
 如果检测到可用更新，页面会弹出确认提示。点击 `确定` 开始更新。
 
-![确认更新 NanoKVM Go 应用](../../../../assets/NanoKVM/go/system/nanokvm_go_updating_confirm_update.webp)
+![确认更新 NanoKVM Go KVM 应用](../../../../assets/NanoKVM/go/system/nanokvm_go_updating_confirm_update.webp)
 
 ## 等待更新完成
 
-点击确定后，保持 NanoKVM Go 通电并保持网络连接，等待应用更新完成。
+点击确定后，保持 NanoKVM Go 通电并保持网络连接，等待 KVM 应用更新完成。
 
-![NanoKVM Go 应用更新进度](../../../../assets/NanoKVM/go/system/nanokvm_go_updating_progress.webp)
+![NanoKVM Go KVM 应用更新进度](../../../../assets/NanoKVM/go/system/nanokvm_go_updating_progress.webp)
 
 更新过程中请勿断电，也不要刷新或关闭页面。更新完成后，按照页面提示继续操作；如果页面自动刷新或重新进入登录页面，重新登录即可。
 

docs/hardware/zh/sidebar.yaml

@@ -560,7 +560,7 @@ items:
             file: kvm/NanoKVM_Go/resolution.md
         -   label: MCP 功能
             file: kvm/NanoKVM_Go/mcp.md
-        -   label: 更新应用
+        -   label: KVM 应用更新
             file: kvm/NanoKVM_Go/system/updating.md
         -   label: 网络
             items:
@@ -570,20 +570,22 @@ items:
                 file: kvm/NanoKVM_Go/network/frp.md
             -   label: 静态 IP
                 file: kvm/NanoKVM_Go/network/static_ip.md
-        -   label: 二次开发
+        -   label: 系统
             items:
             -   label: 系统编译
                 file: kvm/NanoKVM_Go/system/introduction.md
             -   label: 烧录镜像
                 file: kvm/NanoKVM_Go/system/flashing.md
-        -   label: 扩展：自定义 APP
-            file: kvm/NanoKVM_Go/custom_app.md
-        -   label: AI 实时语音对话
+        -   label: 自定义 APP
             items:
-            -   label: 快速体验
-                file: kvm/NanoKVM_Go/realtime_voice_bridge.md
-            -   label: 二次开发
-                file: kvm/NanoKVM_Go/realtime_voice_bridge_technical.md
+            -   label: APP 安装与开发
+                file: kvm/NanoKVM_Go/custom_app.md
+            -   label: AI 实时语音对话
+                items:
+                -   label: 快速体验
+                    file: kvm/NanoKVM_Go/realtime_voice_bridge.md
+                -   label: 二次开发
+                    file: kvm/NanoKVM_Go/realtime_voice_bridge_technical.md
         -   label: FAQ
             file: kvm/NanoKVM_Go/faq.md
     -   label: NanoKVM PCIe