schalli
33b1bc3172
feat(09-04): SplitTab UI + splitCertsAction + render tests
- actions.ts: export SplitEntry + SplitResponse interfaces; add splitCertsAction(file) → POST /split
- SplitTab.tsx: Aufteilen button (disabled without file); per-cert download list (bg-secondary rows)
each row: subject.cn, validity.notAfter, Herunterladen button → downloadBase64
empty state / error state (text-destructive) matching InspectTab pattern
- cert-manager.test.tsx: 2 new SplitTab tests (success: 2 download buttons; error: text-destructive)
- All 11 cert-manager web tests green; production files type-clean