Filtering UX: overview results, auto-clear on re-run, config save fix

- Add filtering results summary card on round Overview tab with pass/fail/flag
  counts and color-coded progress bar (polls every 5s)
- Auto-delete previous filtering results when re-running so new ones stream in
- Rename BUSINESS_CONCEPT to "Concept" in filtering results to prevent overflow
- Fix config save race condition where toggling switches (aiParseFiles, advance
  counts) would revert: pendingSaveRef cleared before refetch completed

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/admin/round/filtering-dashboard.tsx

@@ -774,7 +774,7 @@ export function FilteringDashboard({ competitionId, roundId }: FilteringDashboar
                         </div>
                         <div>
                           <Badge variant="outline" className="text-xs">
-                            {result.project?.competitionCategory || '\u2014'}
+                            {formatCategory(result.project?.competitionCategory) || '\u2014'}
                           </Badge>
                         </div>
                         <div>
@@ -1092,6 +1092,18 @@ export function FilteringDashboard({ competitionId, roundId }: FilteringDashboar
   )
 }
 
+// -- Helpers --
+
+const categoryLabels: Record<string, string> = {
+  BUSINESS_CONCEPT: 'Concept',
+  STARTUP: 'Startup',
+}
+
+function formatCategory(cat: string | null | undefined): string {
+  if (!cat) return ''
+  return categoryLabels[cat] ?? cat.charAt(0) + cat.slice(1).toLowerCase().replace(/_/g, ' ')
+}
+
 // -- Sub-components --
 
 function OutcomeBadge({ outcome, overridden }: { outcome: string; overridden: boolean }) {