chore(ios): iOS 번들ID kr.sblog.slimbudget.app 로 변경 — 애플 로그인 App ID 대응

- 기존 kr.sblog.slimbudget 는 타 계정 선점 → iOS 전용 새 번들ID
- 안드로이드 패키지(kr.sblog.slimbudget)는 유지(플랫폼 독립)
- appleAuth clientId 정합(네이티브 aud=번들ID)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

ios/App/App.xcodeproj/project.pbxproj

@@ -306,7 +306,7 @@
 				);
 				MARKETING_VERSION = 1.0;
 				OTHER_SWIFT_FLAGS = "$(inherited) \"-D\" \"COCOAPODS\" \"-DDEBUG\"";
-				PRODUCT_BUNDLE_IDENTIFIER = kr.sblog.slimbudget;
+				PRODUCT_BUNDLE_IDENTIFIER = kr.sblog.slimbudget.app;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_VERSION = 5.0;
@@ -328,7 +328,7 @@
 					"@executable_path/Frameworks",
 				);
 				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = kr.sblog.slimbudget;
+				PRODUCT_BUNDLE_IDENTIFIER = kr.sblog.slimbudget.app;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = "";
 				SWIFT_VERSION = 5.0;