feat: multi-role jury fix, country flags, applicant deadline banner, timeline

- Fix project list returning empty for users with both SUPER_ADMIN and
  JURY_MEMBER roles (jury filter now skips admins) in project, assignment,
  and evaluation routers
- Add CountryDisplay component showing flag emoji + name everywhere
  country is displayed (admin, observer, jury, mentor views — 17 files)
- Add countdown deadline banner on applicant dashboard for INTAKE,
  SUBMISSION, and MENTORING rounds with live timer
- Remove quick action buttons from applicant dashboard
- Fix competition timeline sidebar: green dots/connectors only up to
  current round, yellow dot for current round, red connector into
  rejected round, grey after

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

src/components/admin/round/project-states-table.tsx

@@ -63,6 +63,7 @@ import {
 } from 'lucide-react'
 import Link from 'next/link'
 import type { Route } from 'next'
+import { CountryDisplay } from '@/components/shared/country-display'
 
 const PROJECT_STATES = ['PENDING', 'IN_PROGRESS', 'PASSED', 'REJECTED', 'COMPLETED', 'WITHDRAWN'] as const
 type ProjectState = (typeof PROJECT_STATES)[number]
@@ -448,7 +449,7 @@ export function ProjectStatesTable({ competitionId, roundId, roundStatus, compet
                 </Badge>
               </div>
               <div className="text-xs text-muted-foreground truncate">
-                {ps.project?.country || '—'}
+                {ps.project?.country ? <CountryDisplay country={ps.project.country} /> : '—'}
               </div>
               <div>
                 <Badge variant="outline" className={`text-xs ${cfg.color}`}>
@@ -1087,7 +1088,7 @@ function AddProjectDialog({
                           <p className="text-sm font-medium truncate">{project.title}</p>
                           <p className="text-xs text-muted-foreground truncate">
                             {project.teamName}
-                            {project.country && <> &middot; {project.country}</>}
+                            {project.country && <> &middot; <CountryDisplay country={project.country} /></>}
                           </p>
                         </div>
                         {project.competitionCategory && (
@@ -1237,7 +1238,7 @@ function AddProjectDialog({
                                 <p className="text-sm font-medium truncate">{project.title}</p>
                                 <p className="text-xs text-muted-foreground truncate">
                                   {project.teamName}
-                                  {project.country && <> &middot; {project.country}</>}
+                                  {project.country && <> &middot; <CountryDisplay country={project.country} /></>}
                                 </p>
                               </div>
                               <div className="flex items-center gap-1.5 ml-2 shrink-0">