feat(mobile): Expo → RN CLI 전환 + Android 빌드 성공

RN 0.85 + React 19 기반 apps/mobile-rn 프로젝트 생성.
6개 화면 이식 (Login, Dash, History, Record, Talk, Settings).
@react-navigation/native + bottom-tabs 네비게이션 구성.
Windows NDK CMake libc++_shared 링크 버그 워크아라운드 포함.
Galaxy Fold (SM_F956N) 무선 디버깅 APK 설치 확인.

apps/mobile-rn/scripts/fix-windows-ndk.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+# fix-windows-ndk.sh — Patches all ninja build files to add libc++_shared.so
+# Workaround for Windows NDK CMake bug where c++_shared is not auto-linked
+# Run this AFTER gradle configure but BEFORE gradle build
+
+MOBILE_RN="$(cd "$(dirname "$0")/.." && pwd)"
+NDK_DIR="$HOME/Android/Sdk/ndk/27.1.12297006"
+LIBCPP="$NDK_DIR/toolchains/llvm/prebuilt/windows-x86_64/sysroot/usr/lib/aarch64-linux-android/libc++_shared.so"
+LIBCPP_WIN=$(echo "$LIBCPP" | sed 's|/c/|C:/|;s|/|/|g')
+
+echo "Patching ninja files with libc++_shared.so..."
+
+find "$MOBILE_RN" -name "build.ninja" -path "*arm64-v8a*" 2>/dev/null | while read ninja; do
+  if grep -q "\-latomic" "$ninja" && ! grep -q "libc++_shared" "$ninja"; then
+    sed -i "s|-latomic -lm|\"$LIBCPP_WIN\" -latomic -lm|g" "$ninja"
+    echo "  Patched: $ninja"
+  fi
+done
+
+echo "Done."