feat: Phase 1 mobile tablet — Jenkins APK, PC tab, in-app update

Capacitor 확장으로 git push 시 Mobile Jenkins 빌드, PC 탭 Android/iPad 다운로드,
앱 내 APK 업데이트, iOS TestFlight API 및 Capacitor ios 프로젝트를 추가한다.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/main/java/com/goldenchart/dto/MobileAppReleaseInfoDto.java

@@ -15,4 +15,8 @@ public class MobileAppReleaseInfoDto {
     private String downloadUrl;
     /** 모바일 설치 안내 페이지 URL */
     private String installPageUrl;
+    /** iPad TestFlight 초대 URL (App Store 정책상 ipa 직접 배포 불가) */
+    private String iosTestFlightUrl;
+    /** TestFlight 링크 제공 여부 */
+    private boolean iosAvailable;
 }

backend/src/main/java/com/goldenchart/service/MobileAppReleaseService.java

@@ -36,13 +36,19 @@ public class MobileAppReleaseService {
     @Value("${goldenchart.mobile-app.public-base-url:}")
     private String configuredPublicBaseUrl;
 
+    @Value("${goldenchart.mobile-app.ios-testflight-url:}")
+    private String iosTestFlightUrl;
+
     public MobileAppReleaseInfoDto getInfo(String requestBaseUrl) {
         String publicBaseUrl = resolvePublicBaseUrl(requestBaseUrl);
+        boolean iosAvailable = iosTestFlightUrl != null && !iosTestFlightUrl.isBlank();
         Optional<Path> apk = resolveApkPath();
         if (apk.isEmpty()) {
             return MobileAppReleaseInfoDto.builder()
                     .available(false)
                     .installPageUrl(buildInstallPageUrl(publicBaseUrl))
+                    .iosAvailable(iosAvailable)
+                    .iosTestFlightUrl(iosAvailable ? iosTestFlightUrl.trim() : null)
                     .build();
         }
         Path file = apk.get();
@@ -61,12 +67,16 @@ public class MobileAppReleaseService {
                     .updatedAt(DT_FMT.format(updated))
                     .downloadUrl(downloadUrl)
                     .installPageUrl(buildInstallPageUrl(publicBaseUrl))
+                    .iosAvailable(iosAvailable)
+                    .iosTestFlightUrl(iosAvailable ? iosTestFlightUrl.trim() : null)
                     .build();
         } catch (IOException e) {
             log.warn("[mobile-app] stat failed: {}", e.getMessage());
             return MobileAppReleaseInfoDto.builder()
                     .available(false)
                     .installPageUrl(buildInstallPageUrl(publicBaseUrl))
+                    .iosAvailable(iosAvailable)
+                    .iosTestFlightUrl(iosAvailable ? iosTestFlightUrl.trim() : null)
                     .build();
         }
     }