Embedded interfaces

Svelte 5 + Vite + Tailwind v4. Vite builds both HTML pages and their shared JavaScript, CSS, and fonts. Go embeds and serves the output; APIs and operator authentication stay in Go.

npm ci --ignore-scripts
npm run check
npm run build
npm run dev
npm run preview

Development pages: http://localhost:5173/ and http://localhost:5173/_internal/. API proxies default to the client on port 1180 and operator on port 11180. Set SPECTER_CLIENT_ORIGIN or SPECTER_OPERATOR_ORIGIN to override them. Preview uses the same paths on port 4173. Run make ui before building the Go binary.

Fonts

Unmodified Google Fonts Latin WOFF2 subsets, downloaded 2026-09-11. Other characters use system fallbacks. SIL OFL 1.1 licenses ship in public/fonts/.

Asset	Bytes	Upstream
Hanken Grotesk, weight 400–700	34,704	Google Fonts
JetBrains Mono, weight 400–500	31,432	Google Fonts