Comprehensive admin UI stats audit: fix 16 display bugs

HIGH fixes:
- H1: Competition detail project count no longer double-counts across rounds
- H2: Rounds page header stats use unfiltered round set
- H3: Rounds page "eval" label corrected to "asgn" (assignment count)
- H4: Observer reports project count uses distinct analytics count
- H5: Awards eligibility count filters to only eligible=true (backend)
- H6: Round detail projectCount derived from projectStates for consistency
- H7: Deliberation hasVoted derived from votes array (was always undefined)

MEDIUM fixes:
- M1: Reports page round status badges use correct ROUND_ACTIVE/ROUND_CLOSED enums
- M2: Observer reports badges use ROUND_ prefix instead of stale STAGE_ prefix
- M3: Deliberation list status badges use correct VOTING/TALLYING/RUNOFF enums
- M4: Competition list/detail round count excludes special-award rounds (backend)
- M5: Messages page shows actual recipient count instead of hardcoded "1 user"

LOW fixes:
- L2: Observer analytics jurorCount scoped to round when roundId provided
- L3: Analytics round-scoped project count uses ProjectRoundState not assignments
- L4: JuryGroup delete audit log reports member count (not assignment count)
- L5: Project rankings include unevaluated projects at bottom instead of hiding

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

src/app/(admin)/admin/competitions/[competitionId]/page.tsx

@@ -285,7 +285,7 @@ export default function CompetitionDetailPage() {
               <Layers className="h-4 w-4 text-blue-500" />
               <span className="text-sm font-medium">Rounds</span>
             </div>
-            <p className="text-2xl font-bold mt-1">{competition.rounds.length}</p>
+            <p className="text-2xl font-bold mt-1">{competition.rounds.filter((r: any) => !r.specialAwardId).length}</p>
           </CardContent>
         </Card>
         <Card>
@@ -304,7 +304,7 @@ export default function CompetitionDetailPage() {
               <span className="text-sm font-medium">Projects</span>
             </div>
             <p className="text-2xl font-bold mt-1">
-              {competition.rounds.reduce((sum: number, r: any) => sum + (r._count?.projectRoundStates ?? 0), 0)}
+              {(competition as any).distinctProjectCount ?? 0}
             </p>
           </CardContent>
         </Card>