fix(i18n): 💬 rewrite format hint from technical jargon to friendly app names

Replace 'Supports GPX, KML, and Google Location History JSON' with
'Works with files from Google Maps, Strava, Garmin, and most GPS apps'
in both EN and KO locales.

Author: hletrd

src/lib/i18n.ts

@@ -16,7 +16,7 @@ export const translations = {
     'fileUpload.title': 'Travelback',
     'fileUpload.subtitle': 'Animate your journeys into video',
     'fileUpload.dropHint': 'Drop your travel file here — from Google Maps, Strava, Garmin, AllTrails, or any GPS app',
-    'fileUpload.formatHint': 'Supports GPX, KML, and Google Location History JSON',
+    'fileUpload.formatHint': 'Works with files from Google Maps, Strava, Garmin, and most GPS apps',
     'fileUpload.browseAria': 'Browse files to upload',
     'fileUpload.parsing': 'Parsing...',
     'fileUpload.browse': 'Browse Files',
@@ -222,7 +222,7 @@ export const translations = {
     'fileUpload.title': 'Travelback',
     'fileUpload.subtitle': '여행을 영상으로 만들어보세요',
     'fileUpload.dropHint': '여행 파일을 여기에 놓으세요 — Google 지도, Strava, Garmin, AllTrails 등',
-    'fileUpload.formatHint': 'GPX, KML, Google 위치 기록 JSON 지원',
+    'fileUpload.formatHint': 'Google Maps, Strava, Garmin 등 대부분의 GPS 앱 파일을 지원합니다',
     'fileUpload.browseAria': '업로드할 파일 선택',
     'fileUpload.parsing': '분석 중...',
     'fileUpload.browse': '파일 선택',