Fix Windows artifact filename for electron-updater metadata

Set NSIS artifactName to Purroxy-Setup-${version}.exe (no spaces) and
update the release job's version.json and latest.yml generation to
match, so electron-updater receives a working download path on Windows.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: mreider

.github/workflows/build.yml

@@ -202,15 +202,15 @@ jobs:
       - name: Generate version.json
         run: |
           VERSION="${GITHUB_REF#refs/tags/v}"
-          echo "{\"version\":\"${VERSION}\",\"date\":\"$(date -u +%Y-%m-%dT%H:%M:%SZ)\",\"dmg\":\"Purroxy-${VERSION}-arm64.dmg\",\"exe\":\"Purroxy.Setup.${VERSION}.exe\",\"appimage\":\"Purroxy-${VERSION}.AppImage\"}" > artifacts/version.json
+          echo "{\"version\":\"${VERSION}\",\"date\":\"$(date -u +%Y-%m-%dT%H:%M:%SZ)\",\"dmg\":\"Purroxy-${VERSION}-arm64.dmg\",\"exe\":\"Purroxy-Setup-${VERSION}.exe\",\"appimage\":\"Purroxy-${VERSION}.AppImage\"}" > artifacts/version.json
 
       - name: Generate electron-updater metadata
         run: |
           VERSION="${GITHUB_REF#refs/tags/v}"
           DATE=$(date -u +%Y-%m-%dT%H:%M:%S.000Z)
 
           DMG="artifacts/Purroxy-${VERSION}-arm64.dmg"
-          EXE="artifacts/Purroxy.Setup.${VERSION}.exe"
+          EXE="artifacts/Purroxy-Setup-${VERSION}.exe"
           APPIMAGE="artifacts/Purroxy-${VERSION}.AppImage"
 
           gen_yml() {

electron-builder.yml

@@ -14,6 +14,7 @@ mac:
 win:
   icon: resources/icon.png
   target: nsis
+  artifactName: ${productName}-Setup-${version}.${ext}
 linux:
   category: Utility
   icon: resources/icon.png