stateDiagram-v2
    direction LR
    init: 初始化
    app_loaded: 内置APP模式（通过SDK load_app接口选择要加载的APP）
    ext_ctrl: 外部控制模式（通过SDK switch_mode切换控制模式）

    offline_connected: USB已连接，等待控制服务

    state ext_ctrl {
      direction LR
      planning_pos: 位置控制（规划）
      servo_pos_joint: 位置控制
（伺服，关节空间）
      servo_pos_cart: 位置控制
（伺服，笛卡尔空间）
      servo_vel_joint: 速度控制
（伺服，关节空间）
      servo_vel_cart: 速度控制
（伺服，笛卡尔空间）
      gravity_comp: 重力补偿
    }

    [*] --> init: 上电
    init --> offline_connected: USB连接
    offline_connected --> ext_ctrl: 控制服务启动
    ext_ctrl --> app_loaded: 底座按键 [长按]
    app_loaded --> ext_ctrl: SDK调用 [unload_app]
    app_loaded --> ext_ctrl: 底座按键 [长按]
    ext_ctrl --> app_loaded: SDK调用 [load_app]


    classDef cyan fill:#00FFFF,stroke:#007F7F,stroke-width:2px,color:#000;
    classDef blue fill:#7F7FFF,stroke:#3F3F7F,stroke-width:2px,color:#000;
    classDef red fill:#FF7F7F,stroke:#7F3F3F,stroke-width:2px,color:#000;
    classDef purple fill:#FF7FFF,stroke:#7F3F7F,stroke-width:2px,color:#000;
    classDef green fill:#7FFF7F,stroke:#3F7F3F,stroke-width:2px,color:#000;
    classDef yellow fill:#FFFF3F,stroke:#7F7F3F,stroke-width:2px,color:#000;
    classDef light_grey fill:#BBBBBB,stroke:#777777,stroke-width:2px,color:#000;

    class idle cyan
    class idle breathing
    class drag blue
    class recording blue
    class recording flowing
    class replay_waiting purple
    class replay_waiting flashing
    class replay_ready purple
    class replaying purple
    class replaying breathing
    class replay_paused purple
    class replay_paused flashing

    class planning_pos green
    class servo_pos_joint green
    class servo_pos_cart green
    class servo_vel_joint green
    class servo_vel_cart green
    class gravity_comp green

    class self_check yellow
    class calibration_needed yellow
    class calibration_needed flashing
    class offline_idle light_grey
    class offline_connected light_grey
    class offline_connected breathing
    class failure red