diff --git a/.gitea/workflows/ci-cd.yml b/.gitea/workflows/ci-cd.yml
index f5c8bc5..7cca3e6 100644
--- a/.gitea/workflows/ci-cd.yml
+++ b/.gitea/workflows/ci-cd.yml
@@ -1,6 +1,5 @@
-# CI/CD Gitea Actions : tests à chaque push, puis sur `main` seulement,
-# build des images (registre de conteneurs intégré à Gitea) et déploiement
-# SSH sur le VPS.
+# CI/CD Gitea Actions : à chaque push sur `main`, build des images
+# (registre de conteneurs intégré à Gitea) puis déploiement SSH sur le VPS.
 #
 # Nécessite un runner Gitea Actions (act_runner, exécuteur "docker") attaché
 # au dépôt ou à l'organisation.
@@ -27,72 +26,14 @@ name: ci-cd
 
 on:
   push:
-    branches: ['**']
+    branches: [main]
+
+concurrency:
+  group: ci-cd-${{ gitea.ref }}
+  cancel-in-progress: false
 
 jobs:
-  backend-test:
-    runs-on: ubuntu-latest
-    container: python:3.12-slim
-    services:
-      postgres:
-        image: postgres:16-alpine
-        env:
-          POSTGRES_USER: benevoles
-          POSTGRES_PASSWORD: benevoles
-          POSTGRES_DB: benevoles_test
-        ports:
-          - 5432:5432
-    env:
-      TEST_DATABASE_URL: postgresql+psycopg://benevoles:benevoles@postgres:5432/benevoles_test
-      DATABASE_URL: postgresql+psycopg://benevoles:benevoles@postgres:5432/benevoles_test
-    steps:
-      - name: Installer git et node
-        run: apt-get update && apt-get install -y --no-install-recommends git nodejs
-      - uses: actions/checkout@v4
-      - name: Installer uv
-        run: pip install --no-cache-dir uv
-      - name: Installer les dépendances
-        working-directory: backend
-        run: uv sync
-      - name: Lint
-        working-directory: backend
-        run: uv run ruff check .
-      - name: Migrer la base de test
-        working-directory: backend
-        run: uv run alembic upgrade head
-      - name: Vérifier migration ↔ modèle
-        working-directory: backend
-        run: uv run alembic check
-      - name: Tests
-        working-directory: backend
-        run: uv run pytest -q
-
-  frontend-test:
-    runs-on: ubuntu-latest
-    container: node:20-alpine
-    steps:
-      - name: Installer git et node
-        run: apk add --no-cache git nodejs
-      - uses: actions/checkout@v4
-      - name: Installer les dépendances
-        working-directory: frontend
-        run: npm ci
-      - name: Typecheck
-        working-directory: frontend
-        run: npm run typecheck
-      - name: Lint
-        working-directory: frontend
-        run: npm run lint
-      - name: Build
-        working-directory: frontend
-        run: npm run build
-      - name: Smoke test
-        working-directory: frontend
-        run: npm run smoke
-
   build-backend:
-    needs: backend-test
-    if: gitea.ref == 'refs/heads/main'
     runs-on: ubuntu-latest
     container: docker:27
     steps:
@@ -109,8 +50,7 @@ jobs:
           docker push "$IMAGE:latest"
 
   build-frontend:
-    needs: frontend-test
-    if: gitea.ref == 'refs/heads/main'
+    needs: build-backend   # séquentiel pour ne pas saturer le CPU
     runs-on: ubuntu-latest
     container: docker:27
     steps:
@@ -133,7 +73,6 @@ jobs:
 
   deploy:
     needs: [build-backend, build-frontend]
-    if: gitea.ref == 'refs/heads/main'
     runs-on: ubuntu-latest
     container: alpine:3.20
     steps:
@@ -157,4 +96,4 @@ jobs:
             docker compose -f docker-compose.prod.yml run --rm backend uv run alembic upgrade head
             docker compose -f docker-compose.prod.yml up -d
             docker image prune -f
-          EOF
+          EOF
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