feat(i18n): make Greek available in the language selector

el-GR translations are around 36% complete but were not yet listed in the
UI. Add it to the supported locales list (frontend and backend) and wire
up the dayjs locale mapping.

frontend/src/i18n/index.ts

@@ -41,6 +41,7 @@ export const SUPPORTED_LOCALES = {
 	'fi-FI': 'Suomi',
 	'he-IL': 'עִבְרִית',
 	'sv-SE': 'Svenska',
+	'el-GR': 'Ελληνικά',
 	// IMPORTANT: Also add new languages to useDayjsLanguageSync
 	// IMPORTANT: Also add new languages to pkg/i18n/i18n.go
 } as const

frontend/src/i18n/useDayjsLanguageSync.ts

@@ -33,6 +33,7 @@ export const DAYJS_LOCALE_MAPPING = {
 	'fi-fi': 'fi',
 	'he-il': 'he',
 	'sv-se': 'sv',
+	'el-gr': 'el',
 } as Record<SupportedLocale, ISOLanguage>
 
 export const DAYJS_LANGUAGE_IMPORTS = {
@@ -65,6 +66,7 @@ export const DAYJS_LANGUAGE_IMPORTS = {
 	'fi-fi': () => import('dayjs/locale/fi'),
 	'he-il': () => import('dayjs/locale/he'),
 	'sv-se': () => import('dayjs/locale/sv'),
+	'el-gr': () => import('dayjs/locale/el'),
 } as Record<SupportedLocale, () => Promise<ILocale>>
 
 export async function loadDayJsLocale(language: SupportedLocale) {

pkg/i18n/i18n.go

@@ -77,6 +77,7 @@ var availableLanguages = map[string]bool{
 	"fi-FI":    true,
 	"he-IL":    true,
 	"sv-SE":    true,
+	"el-GR":    true,
 	// IMPORTANT: Also add new languages to the frontend
 }