feat: Android 폰·태블릿 다운로드·앱 내 업데이트 완료

CI에서 APK 버전 자동 bump, 앱 복귀 시 업데이트 확인·시스템 다운로드,
프론트 Android 전용 UI 정리(iPad는 향후).

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

scripts/bump-android-version.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+# CI: .env GC_MOBILE_APP_VERSION 또는 build.gradle 기준 patch bump + versionCode++
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+WORK_TREE="${WORK_TREE:-$ROOT}"
+GRADLE="${GRADLE:-$ROOT/app/android/app/build.gradle}"
+ENV_FILE="${ENV_FILE:-$WORK_TREE/.env}"
+
+if [[ ! -f "$GRADLE" ]]; then
+  echo "build.gradle 없음: $GRADLE" >&2
+  exit 1
+fi
+
+ENV_VER=""
+if [[ -f "$ENV_FILE" ]]; then
+  ENV_VER="$(grep '^GC_MOBILE_APP_VERSION=' "$ENV_FILE" 2>/dev/null | cut -d= -f2- | tr -d '\r' || true)"
+fi
+
+node -e "
+const fs = require('fs');
+const gradlePath = process.argv[1];
+const envVersion = (process.argv[2] || '').trim();
+let content = fs.readFileSync(gradlePath, 'utf8');
+const vc = content.match(/versionCode\\s+(\\d+)/);
+const vn = content.match(/versionName\\s+\"([^\"]+)\"/);
+if (!vc || !vn) {
+  console.error('versionCode/versionName 파싱 실패');
+  process.exit(1);
+}
+let versionCode = parseInt(vc[1], 10);
+let base = envVersion || vn[1];
+const parts = base.split('.').map(n => parseInt(n, 10) || 0);
+while (parts.length < 2) parts.push(0);
+if (parts.length === 2) {
+  parts[1] += 1;
+} else {
+  while (parts.length < 3) parts.push(0);
+  parts[2] += 1;
+}
+const versionName = parts.join('.');
+versionCode += 1;
+content = content.replace(/versionCode\\s+\\d+/, 'versionCode ' + versionCode);
+content = content.replace(/versionName\\s+\"[^\"]+\"/, 'versionName \"' + versionName + '\"');
+fs.writeFileSync(gradlePath, content);
+console.log(versionName);
+" "$GRADLE" "$ENV_VER"