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/server/routers/analytics.ts

@@ -743,7 +743,7 @@ export const analyticsRouter = router({
               select: { userId: true },
               distinct: ['userId'],
             }).then((rows) => rows.length)
-          : ctx.prisma.user.count({ where: { role: 'JURY_MEMBER', status: 'ACTIVE' } }),
+          : ctx.prisma.user.count({ where: { roles: { has: 'JURY_MEMBER' }, status: 'ACTIVE' } }),
         ctx.prisma.evaluation.count({ where: evalFilter }),
         ctx.prisma.assignment.count({ where: assignmentFilter }),
         ctx.prisma.evaluation.findMany({