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/observer/reports/project-preview-dialog.tsx

@@ -13,6 +13,7 @@ import { Button } from '@/components/ui/button'
 import { Skeleton } from '@/components/ui/skeleton'
 import { Separator } from '@/components/ui/separator'
 import { StatusBadge } from '@/components/shared/status-badge'
+import { CountryDisplay } from '@/components/shared/country-display'
 import { ExternalLink, MapPin, Waves, Users } from 'lucide-react'
 import Link from 'next/link'
 import type { Route } from 'next'
@@ -78,7 +79,7 @@ export function ProjectPreviewDialog({ projectId, open, onOpenChange }: ProjectP
                 {data.project.country && (
                   <Badge variant="outline" className="gap-1">
                     <MapPin className="h-3 w-3" />
-                    {data.project.country}
+                    <CountryDisplay country={data.project.country} />
                   </Badge>
                 )}
                 {data.project.competitionCategory && (