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/dashboard/previous-round-section.tsx

@@ -6,6 +6,7 @@ import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
 import { Badge } from '@/components/ui/badge'
 import { Skeleton } from '@/components/ui/skeleton'
 import { AnimatedCard } from '@/components/shared/animated-container'
+import { CountryDisplay } from '@/components/shared/country-display'
 import { ArrowDown, ChevronDown, ChevronUp, TrendingDown } from 'lucide-react'
 import { cn, formatCategory } from '@/lib/utils'
 
@@ -107,7 +108,7 @@ export function PreviousRoundSection({ currentRoundId }: { currentRoundId: strin
                 <div className="grid grid-cols-2 gap-x-4 gap-y-1">
                   {countryAttrition.map((c: any) => (
                     <div key={c.country} className="flex items-center justify-between text-sm py-0.5">
-                      <span className="truncate">{c.country}</span>
+                      <span className="truncate"><CountryDisplay country={c.country} /></span>
                       <Badge variant="destructive" className="tabular-nums text-xs">
                         -{c.lost}
                       </Badge>