Replace all emojis with ASCII status indicators

Replaced all emoji characters with standard ASCII status prefixes
to prevent encoding issues on Windows systems:
- ✓/❌ → [OK]/[ERROR]
- ⚠️ → [WARN]
- 📦/🔨/🧹/⬇️/📥 → [INFO]

This ensures the script works correctly on all Windows configurations
regardless of console encoding settings.

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

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

scripts/build.bat

@@ -11,12 +11,12 @@ REM Detect Go
 REM ----------------------------
 where go >nul 2>&1
 if %ERRORLEVEL% neq 0 (
-    echo ❌ ERROR: Go is not installed or not in PATH.
+    echo [ERROR] Go is not installed or not in PATH.
     echo Download Go from: https://go.dev/dl/
     exit /b 1
 )
 
-echo 📦 Go version:
+echo [INFO] Go version:
 go version
 echo.
 
@@ -28,10 +28,10 @@ where winget >nul 2>&1
 set WINGET_CHECK=!ERRORLEVEL!
 if !WINGET_CHECK! equ 0 (
     set WINGET_AVAILABLE=1
-    echo ✓ winget found (automatic installation available)
+    echo [OK] winget found ^(automatic installation available^)
 ) else (
-    echo ⚠️  winget not found (manual installation will be required)
-    echo    To enable automatic installation, update to Windows 10 1809+ or Windows 11
+    echo [WARN] winget not found ^(manual installation will be required^)
+    echo        To enable automatic installation, update to Windows 10 1809+ or Windows 11
 )
 echo.
 
@@ -41,28 +41,28 @@ REM ----------------------------
 where git >nul 2>&1
 set GIT_CHECK=!ERRORLEVEL!
 if !GIT_CHECK! equ 0 (
-    echo ✓ Git found
+    echo [OK] Git found
     git --version
 ) else (
-    echo ⚠️  Git not found (recommended for development)
+    echo [WARN] Git not found ^(recommended for development^)
 
     if !WINGET_AVAILABLE! equ 1 (
         echo.
-        echo Would you like to install Git automatically? (Y/N):
+        echo Would you like to install Git automatically? ^(Y/N^):
         set /p install_git=
 
         if /I "!install_git!"=="Y" (
             echo.
-            echo 📥 Installing Git via winget...
+            echo [INFO] Installing Git via winget...
             winget install -e --id=Git.Git
             set GIT_INSTALL_RESULT=!ERRORLEVEL!
 
             if !GIT_INSTALL_RESULT! equ 0 (
-                echo ✓ Git installed successfully!
+                echo [OK] Git installed successfully!
                 echo Please restart your terminal and run this script again.
                 exit /b 0
             ) else (
-                echo ❌ Failed to install Git automatically.
+                echo [ERROR] Failed to install Git automatically.
                 echo Please install manually from: https://git-scm.com/
             )
         )
@@ -78,44 +78,44 @@ REM ----------------------------
 where gcc >nul 2>&1
 set GCC_CHECK=!ERRORLEVEL!
 if !GCC_CHECK! neq 0 (
-    echo ⚠️  WARNING: GCC not found. CGO requires a C compiler.
+    echo [WARN] GCC not found. CGO requires a C compiler.
     echo.
     echo VideoTools requires MinGW-w64 to build on Windows.
     echo.
 
     if !WINGET_AVAILABLE! equ 1 (
-        echo Would you like to install MinGW-w64 automatically? (Y/N):
+        echo Would you like to install MinGW-w64 automatically? ^(Y/N^):
         set /p install_gcc=
 
         if /I "!install_gcc!"=="Y" (
             echo.
-            echo 📥 Installing MinGW-w64 via winget...
+            echo [INFO] Installing MinGW-w64 via winget...
             echo This may take a few minutes...
             winget install -e --id=MSYS2.MSYS2
             set MSYS2_INSTALL_RESULT=!ERRORLEVEL!
 
         if !MSYS2_INSTALL_RESULT! equ 0 (
-            echo ✓ MSYS2 installed successfully!
+            echo [OK] MSYS2 installed successfully!
             echo.
-            echo 📦 Installing GCC toolchain...
+            echo [INFO] Installing GCC toolchain...
             C:\msys64\usr\bin\bash.exe -lc "pacman -S --noconfirm mingw-w64-x86_64-gcc"
             set GCC_INSTALL_RESULT=!ERRORLEVEL!
 
             if !GCC_INSTALL_RESULT! equ 0 (
-                echo ✓ GCC installed successfully!
+                echo [OK] GCC installed successfully!
                 echo.
-                echo 🔧 Adding MinGW to PATH for this session...
+                echo [INFO] Adding MinGW to PATH for this session...
                 set "PATH=C:\msys64\mingw64\bin;!PATH!"
 
-                echo ✓ Setup complete! Continuing with build...
+                echo [OK] Setup complete! Continuing with build...
                 echo.
             ) else (
-                echo ❌ Failed to install GCC. Please install manually.
+                echo [ERROR] Failed to install GCC. Please install manually.
                 echo Visit: https://www.msys2.org/
                 exit /b 1
             )
         ) else (
-            echo ❌ Failed to install MSYS2. Please install manually.
+            echo [ERROR] Failed to install MSYS2. Please install manually.
             echo Visit: https://www.msys2.org/
             exit /b 1
         )
@@ -128,7 +128,7 @@ if !GCC_CHECK! neq 0 (
 
     REM Show manual installation instructions if we get here
     echo.
-    echo ❌ GCC is required to build VideoTools on Windows.
+    echo [ERROR] GCC is required to build VideoTools on Windows.
     echo.
     echo Please install MinGW-w64 manually:
     echo   1. Install MSYS2 from https://www.msys2.org/
@@ -139,7 +139,7 @@ if !GCC_CHECK! neq 0 (
     exit /b 1
     )
 ) else (
-    echo ✓ GCC found:
+    echo [OK] GCC found:
     gcc --version | findstr /C:"gcc"
     echo.
 )
@@ -152,28 +152,28 @@ pushd "%~dp0\.."
 REM ----------------------------
 REM Clean previous build
 REM ----------------------------
-echo 🧹 Cleaning previous Windows build...
+echo [INFO] Cleaning previous Windows build...
 if exist VideoTools.exe del /f VideoTools.exe
-echo ✓ Cache cleaned
+echo [OK] Cache cleaned
 echo.
 
 REM ----------------------------
 REM Download go dependencies
 REM ----------------------------
-echo ⬇️  Downloading dependencies...
+echo [INFO] Downloading dependencies...
 go mod download
 if %ERRORLEVEL% neq 0 (
-    echo ❌ Failed to download dependencies.
+    echo [ERROR] Failed to download dependencies.
     exit /b 1
 )
-echo ✓ Dependencies downloaded
+echo [OK] Dependencies downloaded
 echo.
 
 REM ----------------------------
 REM Build VideoTools (Windows GUI mode)
 REM Note: CGO is required for Fyne/OpenGL on Windows
 REM ----------------------------
-echo 🔨 Building VideoTools.exe...
+echo [INFO] Building VideoTools.exe...
 
 REM Enable CGO for Windows build (required for Fyne)
 set CGO_ENABLED=1
@@ -184,26 +184,26 @@ go build ^
     .
 
 if %ERRORLEVEL% neq 0 (
-    echo ❌ Build failed!
+    echo [ERROR] Build failed!
     popd
     exit /b 1
 )
 
-echo ✓ Build successful!
+echo [OK] Build successful!
 echo.
 
 REM ----------------------------
 REM Show file size
 REM ----------------------------
 for %%A in (VideoTools.exe) do set FILESIZE=%%~zA
-echo Output: VideoTools.exe  (Size: !FILESIZE! bytes)
+echo Output: VideoTools.exe  ^(Size: !FILESIZE! bytes^)
 echo.
 
 REM ----------------------------
 REM Offer to run FFmpeg setup
 REM ----------------------------
 if exist "%~dp0setup-windows.ps1" (
-    echo Would you like to download FFmpeg now? (Y/N):
+    echo Would you like to download FFmpeg now? ^(Y/N^):
     set /p choice=
 
     if /I "!choice!"=="Y" (