Completes FC-6.3 with the UI.
- SeriesView gains tabs: Browse (the existing grid) + Suggestions.
- Suggestions tab: pending matches as rows (post → series, per-signal strength
chips, score), Add (→ chapter) / Skip (→ dismiss); a "Matching on" toggle and
a threshold field (both DB-backed via /settings/import), and a Rescan button
that enqueues the background matcher.
- seriesSuggestions store wires load / accept / dismiss / rescan / settings.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
