Add season calendar to command center

frontend/src/lib/gpIdentity.ts

@@ -11,6 +11,7 @@ const COUNTRY_ACCENTS: Record<string, string> = {
   DEU: '#cdc7c2',
   BEL: '#e0a01b',
   NLD: '#ef7c1a',
+  NED: '#ef7c1a',
   HUN: '#3f8a4b',
   AUT: '#c61f1f',
   AZE: '#1f7eaf',
@@ -20,8 +21,11 @@ const COUNTRY_ACCENTS: Record<string, string> = {
   SGP: '#c8202c',
   BRA: '#2fa84f',
   BHR: '#a8132b',
+  BRN: '#a8132b',
   SAU: '#0a7a3b',
+  KSA: '#0a7a3b',
   ARE: '#4d6b2a',
+  UAE: '#4d6b2a',
   QAT: '#7a1e3e',
   CHN: '#c8202c',
   MEX: '#1f7a4d',
@@ -43,6 +47,46 @@ export function countryDecal(meeting: Meeting | undefined | null): string {
   return name.slice(0, 3).toUpperCase() || '—'
 }
 
+export function countryFlag(meeting: Meeting | undefined | null): string {
+  if (meeting?.country_flag && !/^https?:\/\//i.test(meeting.country_flag)) return meeting.country_flag
+  const code = meeting?.country_code?.toUpperCase()
+  const iso2 = code ? CODE3_TO_2[code] : ''
+  if (!iso2) return ''
+  const offset = 0x1f1e6 - 65
+  return String.fromCodePoint(iso2.charCodeAt(0) + offset, iso2.charCodeAt(1) + offset)
+}
+
+const CODE3_TO_2: Record<string, string> = {
+  AUS: 'AU',
+  AUT: 'AT',
+  AZE: 'AZ',
+  BEL: 'BE',
+  BHR: 'BH',
+  BRN: 'BH',
+  BRA: 'BR',
+  CAN: 'CA',
+  CHN: 'CN',
+  DEU: 'DE',
+  GER: 'DE',
+  ESP: 'ES',
+  FRA: 'FR',
+  GBR: 'GB',
+  HUN: 'HU',
+  ITA: 'IT',
+  JPN: 'JP',
+  MEX: 'MX',
+  MON: 'MC',
+  NED: 'NL',
+  NLD: 'NL',
+  QAT: 'QA',
+  SAU: 'SA',
+  KSA: 'SA',
+  SGP: 'SG',
+  UAE: 'AE',
+  ARE: 'AE',
+  USA: 'US',
+}
+
 export function formatGpDateRange(meeting: Meeting | undefined | null): string {
   if (!meeting) return ''
   const start = meeting.date_start?.slice(0, 10)