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/members-content.tsx

@@ -364,9 +364,16 @@ export function MembersContent() {
                       </div>
                     </TableCell>
                     <TableCell>
-                      <Badge variant={roleColors[user.role] || 'secondary'}>
-                        {user.role.replace(/_/g, ' ')}
-                      </Badge>
+                      <div className="flex flex-wrap gap-1">
+                        {((user as unknown as { roles?: string[] }).roles?.length
+                          ? (user as unknown as { roles: string[] }).roles
+                          : [user.role]
+                        ).map((r) => (
+                          <Badge key={r} variant={roleColors[r] || 'secondary'}>
+                            {r.replace(/_/g, ' ')}
+                          </Badge>
+                        ))}
+                      </div>
                     </TableCell>
                     <TableCell>
                       {user.expertiseTags && user.expertiseTags.length > 0 ? (
@@ -469,9 +476,16 @@ export function MembersContent() {
                 <CardContent className="space-y-3">
                   <div className="flex items-center justify-between text-sm">
                     <span className="text-muted-foreground">Role</span>
-                    <Badge variant={roleColors[user.role] || 'secondary'}>
-                      {user.role.replace(/_/g, ' ')}
-                    </Badge>
+                    <div className="flex flex-wrap gap-1 justify-end">
+                      {((user as unknown as { roles?: string[] }).roles?.length
+                        ? (user as unknown as { roles: string[] }).roles
+                        : [user.role]
+                      ).map((r) => (
+                        <Badge key={r} variant={roleColors[r] || 'secondary'}>
+                          {r.replace(/_/g, ' ')}
+                        </Badge>
+                      ))}
+                    </div>
                   </div>
                   <div className="flex items-center justify-between text-sm">
                     <span className="text-muted-foreground">Assignments</span>