feat(android): add build-apk.bat script for easy APK building

Add Windows batch script for building Android APKs:
- build-apk.bat debug   - Build debug APK only
- build-apk.bat release - Build release APK only
- build-apk.bat         - Build both debug and release APKs
- build-apk.bat clean   - Clean build files
- build-apk.bat help    - Show usage help

Output locations:
- Debug: app/build/outputs/apk/debug/app-debug.apk
- Release: app/build/outputs/apk/release/app-release.apk

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/mpc-system/services/service-party-android/build-apk.bat

@@ -0,0 +1,126 @@
+@echo off
+setlocal enabledelayedexpansion
+
+echo ========================================
+echo   TSS Party Android APK Builder
+echo ========================================
+echo.
+
+:: Check if gradlew exists
+if not exist "gradlew.bat" (
+    echo [ERROR] gradlew.bat not found!
+    echo Please run this script from the service-party-android directory.
+    pause
+    exit /b 1
+)
+
+:: Parse command line arguments
+set BUILD_TYPE=all
+if "%1"=="debug" set BUILD_TYPE=debug
+if "%1"=="release" set BUILD_TYPE=release
+if "%1"=="clean" set BUILD_TYPE=clean
+if "%1"=="help" goto :show_help
+
+:: Show build type
+echo Build type: %BUILD_TYPE%
+echo.
+
+:: Clean build
+if "%BUILD_TYPE%"=="clean" (
+    echo [1/1] Cleaning build files...
+    call gradlew.bat clean --no-daemon
+    if !errorlevel! neq 0 (
+        echo [ERROR] Clean failed!
+        pause
+        exit /b 1
+    )
+    echo.
+    echo [SUCCESS] Clean completed!
+    goto :end
+)
+
+:: Build Debug APK
+if "%BUILD_TYPE%"=="debug" goto :build_debug
+if "%BUILD_TYPE%"=="all" goto :build_debug
+goto :check_release
+
+:build_debug
+echo [1/2] Building Debug APK...
+call gradlew.bat assembleDebug --no-daemon
+if !errorlevel! neq 0 (
+    echo [ERROR] Debug build failed!
+    pause
+    exit /b 1
+)
+echo [SUCCESS] Debug APK built successfully!
+echo   Location: app\build\outputs\apk\debug\app-debug.apk
+echo.
+
+:check_release
+if "%BUILD_TYPE%"=="debug" goto :show_results
+
+:: Build Release APK
+:build_release
+echo [2/2] Building Release APK...
+call gradlew.bat assembleRelease --no-daemon
+if !errorlevel! neq 0 (
+    echo [ERROR] Release build failed!
+    pause
+    exit /b 1
+)
+echo [SUCCESS] Release APK built successfully!
+echo   Location: app\build\outputs\apk\release\app-release.apk
+echo.
+
+:show_results
+echo ========================================
+echo   Build Results
+echo ========================================
+echo.
+
+:: Check and show Debug APK
+if exist "app\build\outputs\apk\debug\app-debug.apk" (
+    for %%F in ("app\build\outputs\apk\debug\app-debug.apk") do (
+        echo [DEBUG APK]
+        echo   Path: %%~fF
+        echo   Size: %%~zF bytes
+    )
+    echo.
+)
+
+:: Check and show Release APK
+if exist "app\build\outputs\apk\release\app-release.apk" (
+    for %%F in ("app\build\outputs\apk\release\app-release.apk") do (
+        echo [RELEASE APK]
+        echo   Path: %%~fF
+        echo   Size: %%~zF bytes
+    )
+    echo.
+)
+
+echo ========================================
+echo   Build completed successfully!
+echo ========================================
+goto :end
+
+:show_help
+echo.
+echo Usage: build-apk.bat [option]
+echo.
+echo Options:
+echo   debug    - Build debug APK only
+echo   release  - Build release APK only
+echo   all      - Build both debug and release APKs (default)
+echo   clean    - Clean build files
+echo   help     - Show this help message
+echo.
+echo Examples:
+echo   build-apk.bat           - Build both APKs
+echo   build-apk.bat debug     - Build debug APK only
+echo   build-apk.bat release   - Build release APK only
+echo   build-apk.bat clean     - Clean project
+echo.
+
+:end
+echo.
+pause