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/shared/country-display.tsx

@@ -0,0 +1,30 @@
+'use client'
+
+import { getCountryFlag, getCountryName, normalizeCountryToCode } from '@/lib/countries'
+
+/**
+ * Displays a country flag emoji followed by the country name.
+ * Accepts either an ISO-2 code or a full country name.
+ */
+export function CountryDisplay({
+  country,
+  showName = true,
+  className,
+}: {
+  country: string | null | undefined
+  showName?: boolean
+  className?: string
+}) {
+  if (!country) return null
+
+  const code = normalizeCountryToCode(country)
+  const flag = code ? getCountryFlag(code) : null
+  const name = code ? getCountryName(code) : country
+
+  return (
+    <span className={className}>
+      {flag && <span className="mr-1">{flag}</span>}
+      {showName && name}
+    </span>
+  )
+}