feat: AAB 용량 최적화 — 54.5MB → 27.4MB (49.6% 감소)

[unam98]

작업 배경

• R8 난독화(feat: R8 난독화 및 리소스 축소 활성화 #379) 적용 후에도 AAB 46.8MB로 큰 상태 → 분석 결과 75%가 Naver Map SDK 네이티브 라이브러리, 나머지는 미사용 폰트/비효율 이미지
• ABI 필터링 + 미사용 리소스 정리로 추가 용량 절감

변경 사항

1. ABI 필터링 (app/build.gradle)

• ndk { abiFilters 'arm64-v8a', 'armeabi-v7a' } 추가
• x86/x86_64 (에뮬레이터 전용) 제거 → 실 디바이스 99%+ 커버
• 최신 에뮬레이터(API 28+)는 ARM 바이너리 트랜슬레이션을 지원하므로 에뮬레이터 테스트도 정상 동작

2. 미사용 Pretendard 폰트 제거

• 삭제: thin, extralight, light, extrabold, black (5개, 6.5MB)
• 유지: regular, medium, semibold, bold (실제 사용 중인 4개)
• runnect_font.xml, Type.kt에서 참조 함께 제거

3. 스플래시 PNG → WebP 변환

• 5개 density PNG (1.2MB) → WebP (103KB)로 변환 (91% 절감)

AAB 용량 변화 (전체 누적)

단계	AAB 용량	절감률
원본 (난독화 전)	54.5 MB	—
R8 난독화 적용 (#379)	46.8 MB	-14%
+ ABI 필터링 + 폰트 + WebP (이 PR)	27.4 MB	-49.6% (누적)

영향 범위

• debug/release 모두 arm64-v8a, armeabi-v7a만 포함
• UI 변경 없음 — 사용 중인 폰트 4개와 스플래시 이미지는 그대로 유지

Test Plan

• ./gradlew bundleRelease 빌드 성공
• AAB 용량 27.4MB 확인
• 릴리즈 빌드 설치 → 폰트 렌더링 정상 확인 (Regular/Medium/SemiBold/Bold)
• 스플래시 화면 정상 표시 확인
• Naver Map 정상 동작 확인
• arm64-v8a 실 디바이스 테스트

🤖 Generated with Claude Code

[coderabbitai]

📝 Walkthrough

Walkthrough

The pull request restricts native library packaging to specific ARM architectures via NDK abiFilters in the build configuration and removes unused Pretendard font weights (100, 200, 300, 800, 900) from both the font family definition and font resource mappings.

Changes

Cohort / File(s)	Summary
Build Configuration app/build.gradle	Added NDK abiFilters to android.defaultConfig to restrict native library packaging to arm64-v8a and armeabi-v7a architectures.
Font Weight Cleanup app/src/main/java/com/runnect/runnect/presentation/ui/theme/Type.kt, app/src/main/res/font/runnect_font.xml	Removed declarations for Pretendard font weights: Thin (100), ExtraLight (200), Light (300), ExtraBold (800), and Black (900). Retained Regular, Medium, SemiBold, and Bold weights.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

🐰 The rabbit hops through code so clean,
Trimming fonts we've never seen,
ARM architectures, two to keep,
Lightweight builds, not a peep!
Pretendard weights all lean and bright,
Hopping forward—swift and light! 🐾

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main objective: AAB size optimization from 54.5MB to 27.4MB (49.6% reduction), which is supported by the changes to build configuration (ABI filtering), font removal, and image conversion.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/reduce-aab-size

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[unam98]

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