Add dependency checker script for Windows builds

scripts/check-dependencies.ps1

@@ -0,0 +1,166 @@
+# EU-Utility V3 - Dependency Checker for Windows
+# Run this in PowerShell to verify all build prerequisites
+
+param(
+    [switch]$InstallMissing
+)
+
+$ErrorActionPreference = "Stop"
+$hasErrors = $false
+
+Write-Host "`n=== EU-Utility V3 Build Dependency Checker ===`n" -ForegroundColor Cyan
+
+# 1. Check Node.js
+Write-Host "Checking Node.js..." -NoNewline
+$nodeVersion = & node --version 2>$null
+if ($nodeVersion) {
+    Write-Host " OK ($nodeVersion)" -ForegroundColor Green
+} else {
+    Write-Host " MISSING" -ForegroundColor Red
+    Write-Host "  Install from: https://nodejs.org/" -ForegroundColor Yellow
+    $hasErrors = $true
+}
+
+# 2. Check npm
+Write-Host "Checking npm..." -NoNewline
+$npmVersion = & npm --version 2>$null
+if ($npmVersion) {
+    Write-Host " OK ($npmVersion)" -ForegroundColor Green
+} else {
+    Write-Host " MISSING" -ForegroundColor Red
+    $hasErrors = $true
+}
+
+# 3. Check Rust/Cargo
+Write-Host "Checking Rust..." -NoNewline
+$cargoVersion = & cargo --version 2>$null
+if ($cargoVersion) {
+    Write-Host " OK ($cargoVersion)" -ForegroundColor Green
+} else {
+    Write-Host " MISSING" -ForegroundColor Red
+    Write-Host "  Install from: https://rustup.rs/" -ForegroundColor Yellow
+    $hasErrors = $true
+}
+
+# 4. Check Tauri CLI
+Write-Host "Checking Tauri CLI..." -NoNewline
+$tauriVersion = & npx tauri --version 2>$null
+if ($tauriVersion) {
+    Write-Host " OK ($tauriVersion)" -ForegroundColor Green
+} else {
+    Write-Host " MISSING" -ForegroundColor Red
+    Write-Host "  Install with: npm install -g @tauri-apps/cli@^1.5.0" -ForegroundColor Yellow
+    $hasErrors = $true
+}
+
+# 5. Check Visual Studio Build Tools
+Write-Host "Checking Visual Studio Build Tools..." -NoNewline
+$clPath = Get-Command cl.exe -ErrorAction SilentlyContinue
+$vcvarsPath = "${env:ProgramFiles(x86)}\Microsoft Visual Studio\2022\BuildTools\VC\Auxiliary\Build\vcvars64.bat"
+$vsPath = "${env:ProgramFiles(x86)}\Microsoft Visual Studio\2022\BuildTools"
+
+if ($clPath -or (Test-Path $vcvarsPath) -or (Test-Path $vsPath)) {
+    Write-Host " OK" -ForegroundColor Green
+} else {
+    Write-Host " MISSING" -ForegroundColor Red
+    Write-Host "  Download from: https://visualstudio.microsoft.com/downloads/#build-tools-for-visual-studio-2022" -ForegroundColor Yellow
+    Write-Host "  Select: 'Desktop development with C++' workload" -ForegroundColor Yellow
+    $hasErrors = $true
+}
+
+# 6. Check vcpkg
+Write-Host "Checking vcpkg..." -NoNewline
+$vcpkgPath = "C:\vcpkg\vcpkg.exe"
+$vcpkgExists = Test-Path $vcpkgPath
+
+if ($vcpkgExists) {
+    Write-Host " OK" -ForegroundColor Green
+} else {
+    Write-Host " MISSING" -ForegroundColor Red
+    Write-Host "  Install with:" -ForegroundColor Yellow
+    Write-Host "    git clone https://github.com/Microsoft/vcpkg.git C:\vcpkg" -ForegroundColor Cyan
+    Write-Host "    C:\vcpkg\bootstrap-vcpkg.bat" -ForegroundColor Cyan
+    $hasErrors = $true
+}
+
+# 7. Check vcpkg static libraries
+if ($vcpkgExists) {
+    Write-Host "`nChecking vcpkg static libraries..." -ForegroundColor White
+    
+    $requiredLibs = @(
+        "tesseract:x64-windows-static-md",
+        "leptonica:x64-windows-static-md",
+        "libpng:x64-windows-static-md",
+        "tiff:x64-windows-static-md",
+        "libjpeg-turbo:x64-windows-static-md",
+        "openjpeg:x64-windows-static-md"
+    )
+    
+    $installedLibs = & C:\vcpkg\vcpkg list 2>$null
+    
+    foreach ($lib in $requiredLibs) {
+        $libName = $lib.Split(':')[0]
+        Write-Host "  Checking $libName..." -NoNewline
+        
+        if ($installedLibs -match $libName) {
+            Write-Host " OK" -ForegroundColor Green
+        } else {
+            Write-Host " MISSING" -ForegroundColor Red
+            if ($InstallMissing) {
+                Write-Host "  Installing $lib..." -ForegroundColor Yellow
+                & C:\vcpkg\vcpkg install $lib
+            } else {
+                Write-Host "  Install with: C:\vcpkg\vcpkg install $lib" -ForegroundColor Cyan
+            }
+            $hasErrors = $true
+        }
+    }
+}
+
+# 8. Check environment variables
+Write-Host "`nChecking environment variables..." -ForegroundColor White
+
+$envVars = @(
+    @{ Name = "VCPKG_ROOT"; Expected = "C:\vcpkg" }
+)
+
+foreach ($var in $envVars) {
+    $name = $var.Name
+    $expected = $var.Expected
+    $value = [Environment]::GetEnvironmentVariable($name, "User")
+    
+    Write-Host "  Checking $name..." -NoNewline
+    
+    if ($value -eq $expected) {
+        Write-Host " OK" -ForegroundColor Green
+    } else {
+        Write-Host " MISSING or INCORRECT" -ForegroundColor Red
+        Write-Host "  Set with: [Environment]::SetEnvironmentVariable('$name', '$expected', 'User')" -ForegroundColor Cyan
+        $hasErrors = $true
+    }
+}
+
+# 9. Check npm dependencies
+Write-Host "`nChecking npm dependencies..." -NoNewline
+Set-Location $PSScriptRoot\..
+$nodeModulesExists = Test-Path "node_modules"
+if ($nodeModulesExists) {
+    Write-Host " OK (node_modules exists)" -ForegroundColor Green
+} else {
+    Write-Host " MISSING" -ForegroundColor Red
+    Write-Host "  Install with: npm install" -ForegroundColor Cyan
+    $hasErrors = $true
+}
+
+# Summary
+Write-Host "`n=== Summary ===" -ForegroundColor Cyan
+if ($hasErrors) {
+    Write-Host "Some dependencies are missing. Fix the issues above and run again." -ForegroundColor Red
+    Write-Host "`nTo install missing vcpkg libraries automatically, run:" -ForegroundColor Yellow
+    Write-Host "  .\scripts\check-dependencies.ps1 -InstallMissing" -ForegroundColor Cyan
+    exit 1
+} else {
+    Write-Host "All dependencies are installed! You can now build with:" -ForegroundColor Green
+    Write-Host "  npm run tauri-build" -ForegroundColor Cyan
+    exit 0
+}