NasTech Agent — Web UI

Browser-based dashboard for managing NasTech Agent configuration, API keys, and monitoring active sessions.

Stack

• Vite + React 19 + TypeScript
• Tailwind CSS v4 with custom dark theme
• shadcn/ui-style components (hand-rolled, no CLI dependency)

Development

# Start the backend API server
cd ../
python -m nastech_cli.main web --no-open

# In another terminal, start the Vite dev server (with HMR + API proxy)
cd web/
npm install
npm run dev

Open the Vite URL printed in the terminal (usually http://localhost:5173). That is the live-reload UI.

nastech dashboard on port 9119 serves the built bundle from nastech_cli/web_dist/, not the Vite dev server — changes in web/src/ will not appear there until you run npm run build and restart the dashboard (or use web --no-open + Vite as above).

The Vite dev server proxies /api requests to http://127.0.0.1:9119 (the FastAPI backend).

Build

npm run build

This outputs to ../nastech_cli/web_dist/, which the FastAPI server serves as a static SPA. The built assets are included in the Python package via pyproject.toml package-data.

Structure

src/
├── components/ui/   # Reusable UI primitives (Card, Badge, Button, Input, etc.)
├── lib/
│   ├── api.ts       # API client — typed fetch wrappers for all backend endpoints
│   └── utils.ts     # cn() helper for Tailwind class merging
├── pages/
│   ├── StatusPage   # Agent status, active/recent sessions
│   ├── ConfigPage   # Dynamic config editor (reads schema from backend)
│   └── EnvPage      # API key management with save/clear
├── App.tsx          # Main layout and navigation
├── main.tsx         # React entry point
└── index.css        # Tailwind imports and theme variables

Typography & contrast rules

Read before adding or editing UI styles. These rules keep the dashboard legible across all built-in themes and stop drift back into the patterns the design system was just refactored out of.

Text size floor

• Minimum body size: text-xs (12px / 0.75rem). Do not use arbitrary text-[0.6rem], text-[0.65rem], text-[9px], text-[10px], or text-[11px] on copy, hints, labels, counts, or badges. Use the standard scale: text-xs, text-sm, text-base.
• Smaller sizes are only acceptable on decorative overlays (chart stripes, empty-state icons) — never on text the user is meant to read.

Opacity floor on text

• Never apply opacity below 0.7 to text. No opacity-30, opacity-50, opacity-60 on <span>s, <p>s, labels, etc.
• Do not stack opacity tokens. Patterns like text-muted-foreground/60, text-midground/70, text-foreground/50 create unpredictable WCAG failures because the parent token already has alpha.
• Use the semantic text tokens from @nastech-ai/ui's globals.css:
  • text-text-primary — default body text.
  • text-text-secondary — subtitles, meta, inactive nav.
  • text-text-tertiary — small chrome labels, counts, footnotes.
  • text-text-disabled — disabled states.
  • text-text-on-accent — text on filled accent surfaces.

Brand uppercase via text-display, not raw uppercase

• The dashboard preserves the NasTech brand uppercase aesthetic, but it is opt-in per element, not global.
• Apply uppercase via the DS utility text-display on brand chrome only — page titles, nav section headings, badges, brand wordmark. DS components (Button, Badge, Tabs, Segmented, etc.) already self-apply text-display.
• Do not introduce new uppercase (the literal Tailwind class) in nastech-agent/web/src. Prefer text-display for new brand chrome. Legacy uppercase call sites (e.g. components/ui/label.tsx, card.tsx) remain until migrated.
• The app shell no longer forces uppercase globally, so blanket normal-case opt-outs are unnecessary. Use normal-case only where a DS component applies text-display but the label should stay sentence case — e.g. dynamic user content (model slugs, theme names) or fixed UI copy that is not brand chrome (EnvPage “not configured” toggle, sidebar “New chat”).

Fonts

Typography is opt-in per surface, not global on layout shells — the app shell and page header keep their original theme/expanded fonts; Mondwest applies only where explicitly set.

| Tier | Classes | Use for | |------|---------|---------| | Brand chrome | font-mondwest text-display (or themedChrome) | Sidebar nav, card section headers (CardTitle), Segmented filter buttons, filter panel headings | | Themed body | font-mondwest normal-case (or themedBody) | Card content (Card, CardDescription), session/platform rows, analytics tables — scoped to the component | | Page chrome | font-expanded | Page header h1 (PageHeaderProvider) — sentence case, not text-display | | Wordmark | Typography + size/tracking only | Sidebar/mobile “NasTech Agent” — mixed case, no Mondwest, no text-display | | Technical | font-mono-ui / font-mono / font-courier | Model slugs, env keys, schedules, YAML, repo URLs |

• Do not put themedBody or themedFont on <main>, App, or other layout wrappers — it overrides component-scoped styles.
• Card applies themedBody; CardTitle uses text-display (uppercase chrome); CardDescription uses themedBody.
• NouiTypography defaults to font-sans unless a font prop is passed.
• Do not use raw font-sans or font-display (theme sans variable) on new dashboard UI — prefer Mondwest tiers above where brand-appropriate.

Color tokens

• Prefer semantic tokens (text-text-*, bg-card, border-border, text-foreground, text-destructive, text-success, text-warning) over raw layer references (text-midground, text-foreground).
• text-muted-foreground is now wired to --color-text-secondary, so existing call sites stay correct, but new code should prefer the semantic name.
• When you genuinely need a non-token color (icon de-emphasis on a chart, terminal foreground via inline style), keep alpha at ≥ 0.7 for any text.