Refresh the duplicate panel after quarantine and restore

[Muawiya-contact]

After a duplicate file is quarantined, its finding disappears but the duplicate panel still lists its old path and the old wasted-byte count.

app/src/App.jsx filters findings through quarantinedPaths, but sends the untouched scan snapshot to the duplicate panel:

const visibleFindings = report.findings.filter(
  (f) => !quarantinedPaths.has(f.entry.path)
);
// Later:
<DuplicatesSection sets={report.duplicate_sets} />

Reproduce: scan a fixture with two identical actionable files. Quarantine one. The findings show one remaining file; the duplicate panel still says two copies. Restore it and check that the two-copy set returns.

Small fix: derive visible duplicate sets from the scan snapshot and the same quarantined-path state. Recalculate wasted from remaining copies and hide sets with fewer than two paths. Preserve the original snapshot so restore can bring a set back.

Done when: two-copy and three-copy sets update correctly on quarantine and restore, with no stale paths or negative totals. Add a focused state/behavior test.

Confirmed by tracing the successful-quarantine state update and the duplicate-panel input on 8abd5cb.