CI: build Svelte avant le déploiement FTP

Installe Node 22 via NodeSource, npm ci + vite build.
Le résultat (assets/dist) est inclus dans le mirror FTP existant.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.forgejo/workflows/deploy.yml

@@ -17,6 +17,13 @@ jobs:
           git clone --depth 1 --branch main https://forge.studio-variable.com/${{ github.repository }}.git .
           ls -la
 
+      - name: Build Svelte app
+        run: |
+          curl -fsSL https://deb.nodesource.com/setup_22.x | bash -
+          apt-get install -y -qq nodejs
+          npm ci
+          npm run build
+
       - name: Deploy via FTP
         env:
           USERNAME: ${{ secrets.USERNAME }}