Improve crop editor and copy publish output to dist

Add resize handles, zoom, view brightness, and a multi-frame still
strip. Keep the crop box on mouse-up, and copy AmiReel.exe to dist.

publish-win-x64.ps1

@@ -16,6 +16,8 @@ $releaseDir = Join-Path $projectDir 'bin\Release\net10.0-windows10.0.26100.0\win
 $releaseExe = Join-Path $releaseDir 'AmiReel.exe'
 $publishDir = Join-Path $releaseDir 'publish'
 $publishExe = Join-Path $publishDir 'AmiReel.exe'
+$distDir = Join-Path $projectDir 'dist'
+$distExe = Join-Path $distDir 'AmiReel.exe'
 $publishArguments = @(
     'publish', $projectPath,
     '-c', 'Release',
@@ -27,11 +29,12 @@ $publishArguments = @(
     '-p:EnableCompressionInSingleFile=true'
 )
 
-if ((Test-Path $releaseExe) -or (Test-Path $publishExe)) {
+if ((Test-Path $releaseExe) -or (Test-Path $publishExe) -or (Test-Path $distExe)) {
     $runningReleaseInstances = Get-Process | Where-Object {
         $_.Path -and (
             [string]::Equals($_.Path, $releaseExe, [System.StringComparison]::OrdinalIgnoreCase) -or
-            [string]::Equals($_.Path, $publishExe, [System.StringComparison]::OrdinalIgnoreCase)
+            [string]::Equals($_.Path, $publishExe, [System.StringComparison]::OrdinalIgnoreCase) -or
+            [string]::Equals($_.Path, $distExe, [System.StringComparison]::OrdinalIgnoreCase)
         )
     }
 
@@ -47,7 +50,16 @@ if (Test-Path $publishDir) {
 }
 
 & dotnet @publishArguments
+if ($LASTEXITCODE -ne 0) {
+    throw "dotnet publish failed with exit code $LASTEXITCODE."
+}
 
-Write-Host "Published AmiReel to $publishDir" -ForegroundColor Green
-Write-Host "Release folder: $publishDir" -ForegroundColor Cyan
-Write-Host "Executable: $publishExe" -ForegroundColor Cyan
+if (-not (Test-Path $publishExe)) {
+    throw "Published executable was not found at $publishExe."
+}
+
+New-Item -ItemType Directory -Path $distDir -Force | Out-Null
+Copy-Item -LiteralPath $publishExe -Destination $distExe -Force
+
+Write-Host "Published AmiReel to $distDir" -ForegroundColor Green
+Write-Host "Executable: $distExe" -ForegroundColor Cyan