Multi-role members, round detail UI overhaul, dashboard jury progress, and submit bug fix

- Add roles UserRole[] to User model with migration + backfill from existing role column
- Update auth JWT/session to propagate roles array with [role] fallback for stale tokens
- Update tRPC hasRole() middleware and add userHasRole() helper for inline role checks
- Update ~15 router inline checks and ~13 DB queries to use roles array
- Add updateRoles admin mutation with SUPER_ADMIN guard and priority-based primary role
- Add role switcher UI in admin sidebar and role-nav for multi-role users
- Remove redundant stats cards from round detail, add window dates to header banner
- Merge Members section into JuryProgressTable with inline cap editor and remove buttons
- Reorder round detail assignments tab: Progress > Score Dist > Assignments > Coverage > Jury Group
- Make score distribution fill full vertical height, reassignment history always open
- Add per-juror progress bars to admin dashboard ActiveRoundPanel for EVALUATION rounds
- Fix evaluation submit bug: use isSubmitting state instead of startMutation.isPending

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

src/components/admin/round/score-distribution.tsx

@@ -21,16 +21,16 @@ export function ScoreDistribution({ roundId }: ScoreDistributionProps) {
   [dist])
 
   return (
-    <Card>
+    <Card className="flex flex-col">
       <CardHeader>
         <CardTitle className="text-base">Score Distribution</CardTitle>
         <CardDescription>
           {dist ? `${dist.totalEvaluations} evaluations \u2014 avg ${dist.averageGlobalScore.toFixed(1)}` : 'Loading...'}
         </CardDescription>
       </CardHeader>
-      <CardContent>
+      <CardContent className="flex flex-col flex-1 pb-4">
         {isLoading ? (
-          <div className="flex items-end gap-1 h-32">
+          <div className="flex items-end gap-1 flex-1 min-h-[120px]">
             {Array.from({ length: 10 }).map((_, i) => <Skeleton key={i} className="flex-1 h-full" />)}
           </div>
         ) : !dist || dist.totalEvaluations === 0 ? (
@@ -38,7 +38,7 @@ export function ScoreDistribution({ roundId }: ScoreDistributionProps) {
             No evaluations submitted yet
           </p>
         ) : (
-          <div className="flex gap-1 h-32">
+          <div className="flex gap-1 flex-1 min-h-[120px]">
             {dist.globalDistribution.map((bucket) => {
               const heightPct = (bucket.count / maxCount) * 100
               return (