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/(public)/my-submission/[id]/submission-detail-client.tsx

@@ -20,6 +20,7 @@ import { Alert, AlertDescription, AlertTitle } from '@/components/ui/alert'
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs'
 import { StatusTracker } from '@/components/shared/status-tracker'
 import { MentorChat } from '@/components/shared/mentor-chat'
+import { RequirementUploadList } from '@/components/shared/requirement-upload-slot'
 import {
   ArrowLeft,
   FileText,
@@ -321,6 +322,17 @@ export function SubmissionDetailClient() {
 
         {/* Documents Tab */}
         <TabsContent value="documents">
+          {/* File Requirements Upload Slots */}
+          {project.roundId && (
+            <div className="mb-4">
+              <RequirementUploadList
+                projectId={project.id}
+                roundId={project.roundId}
+                disabled={!isDraft}
+              />
+            </div>
+          )}
+
           <Card>
             <CardHeader>
               <CardTitle>Uploaded Documents</CardTitle>

src/app/(public)/my-submission/[id]/team/page.tsx

@@ -27,6 +27,7 @@ import {
   SelectTrigger,
   SelectValue,
 } from '@/components/ui/select'
+import { RequirementUploadList } from '@/components/shared/requirement-upload-slot'
 import {
   Dialog,
   DialogContent,
@@ -405,6 +406,24 @@ export default function TeamManagementPage() {
         </CardContent>
       </Card>
 
+      {/* Team Documents */}
+      {teamData?.roundId && (
+        <Card>
+          <CardHeader>
+            <CardTitle className="text-lg">Team Documents</CardTitle>
+            <CardDescription>
+              Upload required documents for your project. Any team member can upload files.
+            </CardDescription>
+          </CardHeader>
+          <CardContent>
+            <RequirementUploadList
+              projectId={projectId}
+              roundId={teamData.roundId}
+            />
+          </CardContent>
+        </Card>
+      )}
+
       {/* Info Card */}
       <Card className="bg-muted/50">
         <CardContent className="p-4">