dsh-auto-open-web: Open DSH Web GUI in a standalone application window

# Introduction After running `dsh web` in the terminal to launch the Web profile, DSH defaults to opening a standard tab in the system's default browser to host the GUI. This tab gets mixed in with your daily browsing, lacks an independent window identity in the taskbar, and makes switching between tasks or finding it inconvenient. DSH's philosophy is "everything is a plugin," and this issue can be solved by a plugin as well: dsh-auto-open-web is a resident plugin. Once the HTTP service is bound and the actual listening port is acquired, it automatically opens the GUI in an independent application window (or a browser `--app` window). It also provides a configuration card in Settings → Plugin Configuration. The following sections introduce its behavior, configuration, and installation methods. # What is dsh-auto-open-web