A render error in one viewer or gate widget unmounted the whole React root
(white screen). Add a reusable ErrorBoundary (class component, no new dep) with
resetKeys + an on-brand fallback, and wire it at two surfaces:
- WidgetHost: isolates the gate widget (reset on descriptor id) so a malformed
gate payload no longer blanks the conversation
- SessionDocumentsPanel: wraps each document (reset on doc key/content) so one
crashing viewer degrades only its section; siblings and the panel survive
The observed crash: a schema-linking doc that parses but lacks `candidates`
makes SchemaLinkingViewer throw. Verified live via Playwright against the mock
backend. TDD throughout; tsc clean, 123/123 vitest (+8 new tests).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Adopt the portal's design language so the app embeds seamlessly into its
header/sidebar chrome later:
- Token layer rewritten as raw OKLCH triplets (the previous oklch()-wrapped
vars produced invalid colors; the UI was effectively unstyled). Values mirror
GSD: Manrope + Fraunces fonts, #cb333b red brand, warm off-white surfaces,
pill buttons, brand focus rings. Dark tokens follow .dark or the portal's
[data-bs-theme=dark].
- Layout: no left sidebar, no header (the portal supplies them). Conversation
column flush-left with a slim F1-F8 phase strip; session rail moved to the
RIGHT, mirroring the portal's left sidebar (red section label, red-tint active
item). Editorial empty state.
- Transcript component now actually renders the streamed assistant turns (the
store accumulated them but nothing displayed them). Toaster mounted for errors
(matchMedia polyfill added to the jsdom test setup).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
TDD: App-renders-ThothII test RED then GREEN. ShadCn v4 (base-nova style)
init + button/checkbox/radio-group/textarea/card/dialog/badge/sonner added.
tailwind.config.ts extended with oklch CSS-variable color mapping required
by ShadCn v4 @apply directives. npm test passes; npm run build clean.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
marcopanandClaude Fable 5