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/evaluation.ts

@@ -1,6 +1,6 @@
 import { z } from 'zod'
 import { TRPCError } from '@trpc/server'
-import { router, protectedProcedure, adminProcedure, juryProcedure } from '../trpc'
+import { router, protectedProcedure, adminProcedure, juryProcedure, userHasRole } from '../trpc'
 import { logAudit } from '@/server/utils/audit'
 import { notifyAdmins, NotificationTypes } from '../services/in-app-notification'
 import { reassignAfterCOI } from './assignment'
@@ -20,7 +20,7 @@ export const evaluationRouter = router({
       })
 
       if (
-        ctx.user.role === 'JURY_MEMBER' &&
+        userHasRole(ctx.user, 'JURY_MEMBER') &&
         assignment.userId !== ctx.user.id
       ) {
         throw new TRPCError({ code: 'FORBIDDEN' })