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>

scripts/restart-backend-if-running.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+# docker compose backend가 실행 중이면 재시작 (APK·env 반영)
+set -euo pipefail
+
+WORK_TREE="${WORK_TREE:-$(cd "$(dirname "$0")/.." && pwd)}"
+cd "$WORK_TREE"
+
+if docker compose ps -q backend 2>/dev/null | grep -q .; then
+  echo "[restart-backend] docker compose up -d --no-deps backend"
+  docker compose up -d --no-deps backend
+fi