Adds fetchTriage()/setTriage() to tender-radar-api.ts (plain fetch,
consistent with the existing client). ResultsList batch-fetches the
current user's triage state for the visible ids and merges it into a
local per-tenderId map; a failed triage fetch never blocks rendering the
list itself. Each row gets a Gelesen/Ungelesen and a Favorit toggle
(optimistic update with revert-on-failure, event.stopPropagation() so the
row's own click-to-open-detail doesn't fire); read rows render dimmed.
FilterPanel gains a "Nur Favoriten/Merkliste" checkbox writing favOnly
into the URL, which ResultsList already forwards generically to the
backend. ResultsList.test.tsx extended (Rule 3 — required to keep the
component test green with the new triage batch call) with coverage for
batch-merge, both toggles, optimistic revert, and graceful degradation
when the triage fetch fails.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
schalli
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