ci: build et publie aussi les paquets Linux (AppImage + deb)

- workflow: un seul job build Windows (Wine) + Linux puis publie tout
- publish-gitea.mjs: publie latest-linux.yml, AppImage, deb
- package.json: homepage (requis pour le build deb) + scripts build:all/publish
- publie toujours les 2 plateformes (le script efface tous les assets avant upload)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitea/workflows/publish.yml

@@ -21,7 +21,7 @@ on:
         options: [none, patch, minor, major]
 
 jobs:
-  publish-win:
+  publish:
     runs-on: ubuntu-latest
     container:
       image: electronuserland/builder:20-wine
@@ -45,6 +45,9 @@ jobs:
       - name: Build Windows installer
         run: npm run build:win
 
+      - name: Build Linux installers
+        run: npm run build:linux
+
       - name: Publish to Gitea release
         run: node scripts/publish-gitea.mjs
         env: