dsh-remote-desktop: A Mobile Landscape Shell and Chinese Input Method for DeepSeek Harness

The `dsh-remote-desktop` plugin adapts the DeepSeek Harness web interface for smartphone landscape mode and touch interaction. It does not provide remote connection services, but focuses on landscape layout adaptation, session list navigation, and Chinese input. It supports multiple keyboard types, including symbols, T9, and QWERTY, with stable IME performance and an offline dictionary. When used with apps such as UU Remote, it addresses layout and input challenges when accessing the service on mobile devices.