fix(frontend): child row stripes, deleted-child visibility, selection completeness

EntryRow.jsx / ChildRow:
- Index-based light/dark classes (child-entry-row--light/dark) replace
  nth-child rules; parity comes from children.map idx so no sibling —
  including the loading div — can shift the stripe order
- Loading div moved outside .child-entries so it never affects child
  row ordering at all
- Accept deletedUids prop; filter expanded children array before render
  so deleted children disappear immediately without waiting for reload

EntriesView.jsx: thread deletedUids through to EntryRow

App.jsx:
- Add deletedUids state; handleEntryDeleted/handleBulkDeleted populate it
- isRoot/hasChildDelete computed from entries before setEntries (safe in
  StrictMode — no side-effects inside updater functions)
- Child delete triggers loadEntries to refresh stale parent child_count
  and total_artifact_bytes
- handleRowClick ctrl/meta cache-miss branch uses det.summary (not det)
  from fetchEntryDetail; archiveId added to dep array
- handleRowClick dep array includes archiveId

frontend/src/components/EntriesView.jsx

@@ -2,7 +2,7 @@ import SkeletonEntryRow from './SkeletonEntryRow';
 
 import EntryRow from './EntryRow';
 
-export default function EntriesView({ entries, selectedUids, onRowClick, archiveId, pendingCaptures = [] }) {
+export default function EntriesView({ entries, selectedUids, onRowClick, archiveId, pendingCaptures = [], deletedUids }) {
   return (
     <section id="archive-view" className="view is-active">
       <div className="entry-table">
@@ -27,6 +27,7 @@ export default function EntriesView({ entries, selectedUids, onRowClick, archive
               isMultiSelected={selectedUids.size >= 2 && selectedUids.has(entry.entry_uid)}
               onRowClick={onRowClick}
               selectedUids={selectedUids}
+              deletedUids={deletedUids}
             />
           ))}
         </div>