ci : split deploy workflow into prod and preprod

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

.forgejo/workflows/deploy-prod.yml

@@ -0,0 +1,40 @@
+name: Deploy Production
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    name: Deploy to Production
+    runs-on: docker
+    container:
+      image: forgejo-ci-node:latest
+    steps:
+      - name: Checkout code
+        run: |
+          git clone --depth 1 --branch main https://forge.studio-variable.com/${{ github.repository }}.git .
+
+      - name: Build Svelte app
+        run: |
+          npm ci
+          npm run build
+
+      - name: Deploy via FTP
+        env:
+          USERNAME: ${{ secrets.USERNAME }}
+          PASSWORD: ${{ secrets.PASSWORD }}
+          HOST: ${{ secrets.PRODUCTION_HOST }}
+        run: |
+          apt-get update -qq && apt-get install -y -qq lftp
+          cat > /tmp/lftp-script.txt <<SCRIPT
+          set ftp:ssl-allow no
+          open -u $USERNAME,$PASSWORD $HOST
+          mirror --reverse --verbose --ignore-time --parallel=10 -x local/ assets assets
+          mirror --reverse --verbose --ignore-time --parallel=10 -x accounts/ -x cache/ -x sessions/ site site
+          mirror --reverse --verbose --ignore-time --parallel=10 kirby kirby
+          mirror --reverse --verbose --ignore-time --parallel=10 vendor vendor
+          quit
+          SCRIPT
+          lftp -f /tmp/lftp-script.txt