fix(web): resize the Raider Captain icon to actual icon size

The hand-made captain icon was copied verbatim at its 1254x1254 authoring
resolution instead of being scaled down, shipping an 80x heavier PNG under
a -128 filename to every hunt card and combat surface showing the Captain.
Resize it to 128x128 like its siblings while keeping the authored
composition; also stop the loop from writing a throwaway cropped icon for
that key before the hand-made one overwrites it.

tools/derive-monster-assets.ps1

@@ -126,15 +126,23 @@ foreach ($monster in $monsters) {
     -TargetPath (Join-Path $webImages "combat\sprites\$key-$($monster.spriteHeight).png") `
     -TargetWidth $monster.spriteHeight -Format 'png'
 
+  # The Raider Captain's icon comes from hand-made art below, not a generated
+  # crop of the body art, so skip the crop step for that key here.
+  if ($key -ne 'raider-captain') {
     Save-Icon -SourcePath $cutout `
       -TargetPath (Join-Path $webImages "combat\icons\$key-128.png") `
       -CropX $monster.cropX -CropY $monster.cropY -CropSize $monster.cropSize
+  }
 }
 
-# The Raider Captain has a hand-made icon. Authored art beats a crop.
+# The Raider Captain has a hand-made icon. Authored art beats a generated
-Copy-Item -Force (Join-Path $artEnemies 'PluendererhauptmannIcon.png') `
+# crop, but it still has to ship at icon size: resize the 1254x1254 source
-  (Join-Path $webImages 'combat\icons\raider-captain-128.png')
+# down to 128x128 rather than copying it verbatim. It's already a square
-Write-Host 'wrote raider-captain-128.png (hand-made)'
+# portrait, so a straight bicubic resize preserves the authored composition
+# with no re-cropping.
+Save-Scaled -SourcePath (Join-Path $artEnemies 'PluendererhauptmannIcon.png') `
+  -TargetPath (Join-Path $webImages 'combat\icons\raider-captain-128.png') `
+  -TargetWidth 128 -Format 'png'
 
 foreach ($background in 'Wachturm', 'Aschengrube') {
   $source = Join-Path $artBackgrounds "$background.png"