dsh-custom-fonts

Anyone who spends long stretches in the DeepSeek Harness Web UI eventually notices that the default font pairing is fine, but rarely theirs. The tricky part is not just picking a new face — it is choosing Chinese and Latin fonts independently, giving code blocks their own monospace, and nudging the overall size without breaking layout. dsh-custom-fonts turns that into a single settings page with a live preview, so you stop hunting through source files every time you want a different typeface.

Under the hood it is deliberately lightweight: a client-side shim that injects one global stylesheet and relies on the standard font-family fallback chain. Latin glyphs resolve to your English font first; Han characters, which have no matching glyphs there, drop through to the Chinese font. A later rule hands code regions — pre, code, kbd, samp — to a dedicated monospace face. The size slider uses calc(1em ± Npx) relative to each element's own size, so every nesting depth shifts by exactly the same offset, with no exponential blow-up and no layout collapse. Everything applies on the next page refresh, and a one-click reset strips the injected styles to restore defaults.

It is built for readers and reviewers who live in the Harness chat window, code-heavy conversations, or simply prefer a particular typeface pairing. No host process, no restart — install, refresh the page, and the fonts page is ready to go.