dsh-theme-paper: DeepSeek Harness Paper Theme

The Web interface of DeepSeek Harness (DSH) provides basic appearance configuration by default. The `dsh-theme-paper` plugin introduces a warm, paper-like aesthetic to the interface, inspired by Claude Code, with a cream paper background, warm ink text, and terracotta accents, replacing the default appearance options. This is an official client plugin that supports installation and uninstallation via the `dsh plugin` command, and the built-in appearance can be restored after uninstallation. Before installing, ensure that `pnpm` is available in your `PATH` and that `dsh web` has been run. To enable it, click “Paper” in Settings.