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>

package.json

@@ -5,6 +5,7 @@
   "main": "./out/main/index.js",
   "author": "OFLauncher",
   "license": "MIT",
+  "homepage": "https://gitea.ldpt.fr/zertus/OFLauncher",
   "scripts": {
     "dev": "electron-vite dev",
     "build": "electron-vite build",
@@ -14,7 +15,8 @@
     "start": "electron-vite preview",
     "build:win": "npm run build && electron-builder --win --config electron-builder.yml",
     "build:linux": "npm run build && electron-builder --linux --config electron-builder.yml",
-    "publish:win": "npm run build:win && node scripts/publish-gitea.mjs",
+    "build:all": "npm run build && electron-builder --win --linux --config electron-builder.yml",
+    "publish": "npm run build:all && node scripts/publish-gitea.mjs",
     "postinstall": "electron-builder install-app-deps"
   },
   "dependencies": {