Add file requirements per round and super admin promotion via UI

Part A: File Requirements per Round
- New FileRequirement model with name, description, accepted MIME types, max size, required flag, sort order
- Added requirementId FK to ProjectFile for linking uploads to requirements
- Backend CRUD (create/update/delete/reorder) in file router with audit logging
- Mime type validation and team member upload authorization in applicant router
- Admin UI: FileRequirementsEditor component in round edit page
- Applicant UI: RequirementUploadSlot/List components in submission detail and team pages
- Viewer UI: RequirementChecklist with fulfillment status in file-viewer

Part B: Super Admin Promotion
- Added SUPER_ADMIN to role enums in user create/update/bulkCreate with guards
- Member detail page: SUPER_ADMIN dropdown option with AlertDialog confirmation
- Invite page: SUPER_ADMIN option visible only to super admins

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

src/app/(admin)/admin/members/[id]/page.tsx

@@ -35,6 +35,16 @@ import {
 import { toast } from 'sonner'
 import { TagInput } from '@/components/shared/tag-input'
 import { UserActivityLog } from '@/components/shared/user-activity-log'
+import {
+  AlertDialog,
+  AlertDialogAction,
+  AlertDialogCancel,
+  AlertDialogContent,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogHeader,
+  AlertDialogTitle,
+} from '@/components/ui/alert-dialog'
 import {
   ArrowLeft,
   Save,
@@ -51,6 +61,8 @@ export default function MemberDetailPage() {
   const userId = params.id as string
 
   const { data: user, isLoading, error, refetch } = trpc.user.get.useQuery({ id: userId })
+  const { data: currentUser } = trpc.user.me.useQuery()
+  const isSuperAdmin = currentUser?.role === 'SUPER_ADMIN'
   const updateUser = trpc.user.update.useMutation()
   const sendInvitation = trpc.user.sendInvitation.useMutation()
 
@@ -65,6 +77,8 @@ export default function MemberDetailPage() {
   const [status, setStatus] = useState<string>('INVITED')
   const [expertiseTags, setExpertiseTags] = useState<string[]>([])
   const [maxAssignments, setMaxAssignments] = useState<string>('')
+  const [showSuperAdminConfirm, setShowSuperAdminConfirm] = useState(false)
+  const [pendingSuperAdminRole, setPendingSuperAdminRole] = useState(false)
 
   useEffect(() => {
     if (user) {
@@ -81,7 +95,7 @@ export default function MemberDetailPage() {
       await updateUser.mutateAsync({
         id: userId,
         name: name || null,
-        role: role as 'JURY_MEMBER' | 'MENTOR' | 'OBSERVER' | 'PROGRAM_ADMIN',
+        role: role as 'SUPER_ADMIN' | 'JURY_MEMBER' | 'MENTOR' | 'OBSERVER' | 'PROGRAM_ADMIN',
         status: status as 'INVITED' | 'ACTIVE' | 'SUSPENDED',
         expertiseTags,
         maxAssignments: maxAssignments ? parseInt(maxAssignments) : null,
@@ -211,15 +225,28 @@ export default function MemberDetailPage() {
             </div>
             <div className="space-y-2">
               <Label htmlFor="role">Role</Label>
-              <Select value={role} onValueChange={setRole}>
+              <Select
+                value={role}
+                onValueChange={(v) => {
+                  if (v === 'SUPER_ADMIN') {
+                    setPendingSuperAdminRole(true)
+                    setShowSuperAdminConfirm(true)
+                  } else {
+                    setRole(v)
+                  }
+                }}
+              >
                 <SelectTrigger id="role">
                   <SelectValue />
                 </SelectTrigger>
                 <SelectContent>
+                  {isSuperAdmin && (
+                    <SelectItem value="SUPER_ADMIN">Super Admin</SelectItem>
+                  )}
+                  <SelectItem value="PROGRAM_ADMIN">Program Admin</SelectItem>
                   <SelectItem value="JURY_MEMBER">Jury Member</SelectItem>
                   <SelectItem value="MENTOR">Mentor</SelectItem>
                   <SelectItem value="OBSERVER">Observer</SelectItem>
-                  <SelectItem value="PROGRAM_ADMIN">Program Admin</SelectItem>
                 </SelectContent>
               </Select>
             </div>
@@ -377,6 +404,39 @@ export default function MemberDetailPage() {
           Save Changes
         </Button>
       </div>
+
+      {/* Super Admin Confirmation Dialog */}
+      <AlertDialog open={showSuperAdminConfirm} onOpenChange={setShowSuperAdminConfirm}>
+        <AlertDialogContent>
+          <AlertDialogHeader>
+            <AlertDialogTitle>Grant Super Admin Access?</AlertDialogTitle>
+            <AlertDialogDescription>
+              This will grant <strong>{name || user?.name || 'this user'}</strong> full Super Admin
+              access, including user management, system settings, and all administrative
+              capabilities. This action should only be performed for trusted administrators.
+            </AlertDialogDescription>
+          </AlertDialogHeader>
+          <AlertDialogFooter>
+            <AlertDialogCancel
+              onClick={() => {
+                setPendingSuperAdminRole(false)
+              }}
+            >
+              Cancel
+            </AlertDialogCancel>
+            <AlertDialogAction
+              onClick={() => {
+                setRole('SUPER_ADMIN')
+                setPendingSuperAdminRole(false)
+                setShowSuperAdminConfirm(false)
+              }}
+              className="bg-red-600 hover:bg-red-700"
+            >
+              Confirm Super Admin
+            </AlertDialogAction>
+          </AlertDialogFooter>
+        </AlertDialogContent>
+      </AlertDialog>
     </div>
   )
 }