fix(backend): départage aussi les égalités de timestamp dans latest_by_site

`latest_by_site` portait le même défaut que `latest_for_site` : `DISTINCT ON (site_id)`
ordonné sur `site_id, timestamp DESC` sans départage, alors que `uq_reading_source`
autorise deux lignes au même `site_id`+`timestamp` quand la `source` diffère.
`/stats/summary` pouvait donc afficher une consommation différente d'un appel à
l'autre pour un site alimenté par un backfill CSV et une écriture live.

Test `integration` dédié, qui échoue sans le correctif.

.dockerignore

@@ -0,0 +1,27 @@
+# Dépendances (réinstallées dans l'image)
+node_modules/
+vendor/
+__pycache__/
+*.pyc
+
+# Git et IDE
+.git/
+.gitignore
+.vscode/
+.idea/
+*.swp
+
+# Fichiers de build locaux
+dist/
+build/
+*.log
+
+# Secrets et config locale (CRITIQUE : risque d'exfiltration)
+.env
+.env.local
+*.pem
+*.key
+secrets/
+.npmrc
+.pypirc
+kubeconfig

.github/workflows/frontend.yml

@@ -0,0 +1,77 @@
+name: Frontend
+# Pipeline à choix multiple
+
+on:
+  # workflow_dispatch -> lancement manuel des jobs
+  workflow_dispatch:
+    inputs:
+      job_choice:
+        required: true
+        description: "Choix du job"
+        type: choice
+        default: all
+        options:
+            - build
+            - sonarqube
+            - test
+            - all # lancer tous les jobs
+  push:
+    paths:
+      - "apps/frontend/**"
+      - ".github/workflows/frontend.yml"
+  pull_request:
+    paths:
+      - "apps/frontend/**"
+      - ".github/workflows/frontend.yml"
+# Ordre de lancement des jobs
+# build -> test -> sonarqube -> deploy
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 24
+          cache: npm
+          cache-dependency-path: apps/frontend/package-lock.json
+      
+      - run: npm ci 
+        working-directory: apps/frontend
+      - run: npm run build
+        working-directory: apps/frontend
+
+  test:  
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 24
+          cache: npm
+          cache-dependency-path: apps/frontend/package-lock.json
+      - run: npm ci 
+        working-directory: apps/frontend
+      - run: npm test -- --watch=false
+        working-directory: apps/frontend
+
+  sonarqube:
+    needs: [build, test]
+    name: SonarQube
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        with:
+          fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
+      - name: SonarQube Scan
+        uses: SonarSource/sonarqube-scan-action@7006c4492b2e0ee0f816d36501671557c97f5995 # v8.1.0
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+
+    
+  # deploy:
+  #   runs-on: ubuntu-latest
+  #   steps:
+  #   - run: echo "DEPLOY job is running"

.gitignore

@@ -52,7 +52,8 @@ standalone_admin_password.txt
 secrets/
 
 # Donnees locales
-data/
+data/raw/*
+!data/raw/.gitkeep
 *.sqlite3
 monitoring/grafana/data/
 monitoring/prometheus/data/

Makefile

@@ -1,18 +1,36 @@
 BACKEND := apps/backend
+FRONTEND := apps/frontend
 
 .DEFAULT_GOAL := help
-.PHONY: help install dev lint format typecheck test test-cov test-integration check \
+.PHONY: help install install-backend install-frontend dev dev-backend dev-frontend \
-        docker-build db-up db-down db-reset db-logs db-psql migrate bootstrap-admin
+        lint format typecheck test test-cov test-integration check \
+        openapi docker-build db-up db-down db-reset db-logs db-psql migrate bootstrap-admin
 
 help: ## Liste les cibles disponibles
 	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "  \033[36m%-16s\033[0m %s\n", $$1, $$2}'
 
-install: ## Installe les dépendances du backend
+install: install-backend install-frontend ## Installe les dépendances backend et frontend
+
+install-backend: ## Installe les dépendances du backend
 	cd $(BACKEND) && uv sync --all-groups
 
-dev: ## Lance l'API en rechargement à chaud
+install-frontend: ## Installe les dépendances du frontend
+	cd $(FRONTEND) && npm ci
+
+dev: ## Lance toute la stack (backend + frontend) en rechargement à chaud
+	@trap 'kill 0' EXIT INT TERM; \
+	$(MAKE) --no-print-directory dev-backend & \
+	$(MAKE) --no-print-directory dev-frontend & \
+	wait
+
+dev-backend: ## Lance l'API seule en rechargement à chaud
+	@echo "backend  -> http://localhost:8000 (docs sur /docs)"
 	cd $(BACKEND) && uv run uvicorn app.main:create_app --factory --reload --host 0.0.0.0 --port 8000
 
+dev-frontend: ## Lance le frontend seul en rechargement à chaud
+	@echo "frontend -> http://localhost:4200"
+	cd $(FRONTEND) && npm start
+
 lint: ## Analyse statique du backend
 	cd $(BACKEND) && uv run ruff check .
 
@@ -34,6 +52,9 @@ test-integration: ## Exécute les tests exigeant une base joignable
 
 check: lint typecheck test ## Chaîne de vérification complète
 
+openapi: ## Régénère apps/backend/openapi.json depuis les routes déclarées
+	cd $(BACKEND) && uv run python -m app.cli export-openapi
+
 docker-build: ## Construit l'image du backend
 	docker build -t enervision-backend:local $(BACKEND)
 

README.md

@@ -19,7 +19,7 @@ Ce que la documentation apporte à chacun : [docs/architecture/00-vue-ensemble.m
 | Domaine    | Technologie                         | Emplacement         | Etat          |
 |------------|-------------------------------------|---------------------|---------------|
 | Backend    | FastAPI, Python 3.14                | `apps/backend`      | Initialise    |
-| Frontend   | Angular 22, Node 24 LTS             | `apps/frontend`     | Squelette     |
+| Frontend   | Angular 22, Node 24 LTS             | `apps/frontend`     | Tableau de bord |
 | Base       | PostgreSQL 17 + TimescaleDB         | `db`                | Initialise    |
 | ETL        | Apache Airflow                      | `etl/airflow`       | A initialiser |
 | Infra      | Terraform (k3s single-node)         | `infra/terraform`   | Initialise    |
@@ -27,8 +27,9 @@ Ce que la documentation apporte à chacun : [docs/architecture/00-vue-ensemble.m
 | Monitoring | Prometheus, Grafana, Alertmanager   | `monitoring`        | A initialiser |
 
 Le backend, la base et l'infrastructure (Terraform/k3s) sont initialises a ce stade. Le frontend
-porte le squelette Angular, sans code metier : aucune route, aucun appel d'API. Les autres dossiers
+sert un tableau de bord sur `/dashboard`, dont les données proviennent de fixtures : les endpoints
-portent l'arborescence et un README de cadrage, leur contenu fait l'objet d'un ticket dedie.
+correspondants restent à écrire côté API. Les autres dossiers portent l'arborescence et un README
+de cadrage, leur contenu fait l'objet d'un ticket dedie.
 
 L'etat detaille de chaque brique et les vues d'architecture sont dans
 [docs/architecture](docs/architecture/README.md).
@@ -62,16 +63,17 @@ L'etat detaille de chaque brique et les vues d'architecture sont dans
 
 ## Demarrage
 
-Prerequis : uv, Docker. Le poste doit disposer de Python 3.14, que `uv` installe seul.
+Prerequis : uv, Docker, Node 24 LTS (npm fourni). Le poste doit disposer de Python 3.14, que
+`uv` installe seul.
 
 ```bash
 cp .env.example .env                               # variables de docker-compose
 cp apps/backend/.env.example apps/backend/.env     # variables du backend hors conteneur
 
 make db-up     # PostgreSQL + TimescaleDB, publie sur le port 5433
-make install   # dependances du backend
+make install   # dependances du backend et du frontend
 make migrate   # applique les migrations Alembic
-make dev       # API sur http://localhost:8000, docs sur /docs
+make dev       # backend sur http://localhost:8000 (docs sur /docs), frontend sur http://localhost:4200
 make check     # lint + typage + tests
 ```
 
@@ -82,9 +84,11 @@ Deux fichiers d'environnement, deux usages : `.env` a la racine alimente `docker
 5432, souvent deja pris par une autre base.
 
 La boucle de developpement est `make db-up` puis `make dev` : seule la base tourne en
-conteneur. Le service `backend` du `docker-compose.yml` sert la stack complete et la recette,
+conteneur, le backend et le frontend tournent tous les deux sur le poste, lances ensemble par
-et n'embarque pas le source, donc toute modification y demande un
+`make dev` (logs entrelaces dans le meme terminal, Ctrl+C arrete les deux). `make dev-backend`
-`docker compose up -d --build backend`.
+et `make dev-frontend` restent disponibles pour lancer un seul des deux. Le service `backend`
+du `docker-compose.yml` sert la stack complete et la recette, et n'embarque pas le source, donc
+toute modification y demande un `docker compose up -d --build backend`.
 
 Verifier que la base repond et que l'extension est chargee :
 

apps/backend/README.md

@@ -28,7 +28,7 @@ de demarrer sans elles.
 ## Commandes
 
 Depuis la racine du monorepo, via le `Makefile` : `make install`, `make dev`, `make lint`,
-`make format`, `make typecheck`, `make test`, `make check`, `make docker-build`.
+`make format`, `make typecheck`, `make test`, `make check`, `make openapi`, `make docker-build`.
 
 Directement depuis ce dossier :
 
@@ -39,8 +39,12 @@ uv run ruff format .         # format
 uv run mypy app              # typage strict
 uv run pytest                # tests + couverture
 uv run pytest -m integration # tests exigeant une base joignable
+uv run python -m app.cli export-openapi   # régénère openapi.json
 ```
 
+`openapi.json` est versionné : `tests/api/test_openapi.py` échoue si le fichier ne correspond
+plus aux routes déclarées. Toute PR qui change une route le régénère dans le même commit.
+
 Les conventions de tests, les gabarits et le detail des marqueurs sont dans
 [`TESTING.md`](TESTING.md).
 
@@ -103,6 +107,10 @@ Le sens de dependance est unique : `endpoints` vers `services` vers `repositorie
 | `/api/v1/users` | Liste et crée des comptes | `admin` |
 | `/api/v1/users/{id}` | Change le rôle ou l'activation | `admin` |
 | `/api/v1/users/{id}/password-reset` | Réinitialise et ferme les sessions | `admin` |
+| `/api/v1/sites` | Liste les sites | `lecteur` |
+| `/api/v1/sites/{site_id}` | Décrit un site | `lecteur` |
+| `/api/v1/recommendations` | Liste les recommandations | `lecteur` |
+| `/api/v1/recommendations/{recommendation_id}` | Décrit une recommandation | `lecteur` |
 | `/metrics` | Métriques au format Prometheus | jeton si `APP_METRICS_TOKEN` |
 | `/docs`, `/openapi.json` | Documentation, fermée en `staging` et `prod` | public sinon |
 

apps/backend/alembic/env.py

@@ -19,7 +19,7 @@ config = context.config
 if config.config_file_name is not None:
     fileConfig(config.config_file_name)
 
-config.set_main_option("sqlalchemy.url", get_settings().database_url)
+config.set_main_option("sqlalchemy.url", get_settings().database_url.replace("%", "%%"))
 
 target_metadata = Base.metadata
 

apps/backend/alembic/versions/e6d2026091501_create_data_schema.py

@@ -0,0 +1,218 @@
+"""Création des six tables Data et de l'hypertable reading.
+
+Revision ID: e6d2026091501
+Revises: 821f71be74c0
+"""
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+revision = "e6d2026091501"
+down_revision = "821f71be74c0"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table(
+        "dataset",
+        sa.Column("dataset_id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("dataset_name", sa.Text(), nullable=False),
+        sa.Column("archive_sha256", sa.String(length=64), nullable=False),
+        sa.Column("storage_uri", sa.Text(), nullable=False),
+        sa.Column("source_timezone", sa.Text(), nullable=True),
+        sa.Column(
+            "metadata", postgresql.JSONB(none_as_null=True, astext_type=sa.Text()), nullable=False
+        ),
+        sa.CheckConstraint("dataset_id > 0", name="ck_dataset_positive_id"),
+        sa.PrimaryKeyConstraint("dataset_id"),
+        sa.UniqueConstraint("archive_sha256", name="uq_dataset_archive_sha256"),
+    )
+    op.create_table(
+        "site",
+        sa.Column("site_id", sa.Text(), nullable=False),
+        sa.Column("site_name", sa.Text(), nullable=False),
+        sa.Column("site_type", sa.Text(), nullable=False),
+        sa.Column("location", sa.Text(), nullable=True),
+        sa.Column("capacity_kw", sa.Double(), nullable=True),
+        sa.Column("status", sa.Text(), nullable=True),
+        sa.PrimaryKeyConstraint("site_id"),
+    )
+    op.create_table(
+        "prediction",
+        sa.Column("prediction_id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("site_id", sa.Text(), nullable=False),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.text("now()"),
+            nullable=False,
+        ),
+        sa.Column("target_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("target_metric", sa.Text(), nullable=False),
+        sa.Column("period_minutes", sa.Integer(), nullable=True),
+        sa.Column("predicted_value", sa.Double(), nullable=True),
+        sa.Column("model_reference", sa.Text(), nullable=False),
+        sa.Column("status", sa.Text(), nullable=False),
+        sa.Column("failure_reason", sa.Text(), nullable=True),
+        sa.CheckConstraint(
+            "(status = 'available' AND predicted_value IS NOT NULL AND failure_reason IS NULL) OR (status IN ('insufficient_data', 'error') AND predicted_value IS NULL AND failure_reason IS NOT NULL)",
+            name="ck_prediction_status",
+        ),
+        sa.CheckConstraint(
+            "target_metric <> 'consumption_kwh' OR period_minutes IS NOT NULL",
+            name="ck_prediction_energy_period",
+        ),
+        sa.CheckConstraint(
+            "target_metric IN ('consumption_kwh', 'consumption_kw')", name="ck_prediction_metric"
+        ),
+        sa.CheckConstraint(
+            "period_minutes IS NULL OR period_minutes > 0", name="ck_prediction_period"
+        ),
+        sa.ForeignKeyConstraint(
+            ["site_id"], ["site.site_id"], name="fk_prediction_site", ondelete="RESTRICT"
+        ),
+        sa.PrimaryKeyConstraint("prediction_id"),
+        sa.UniqueConstraint("prediction_id", "site_id", name="uq_prediction_id_site"),
+    )
+    op.create_index(
+        "ix_prediction_site_target", "prediction", ["site_id", "target_at"], unique=False
+    )
+    op.create_table(
+        "reading",
+        sa.Column("reading_id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("site_id", sa.Text(), nullable=False),
+        sa.Column("timestamp", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("source", sa.Text(), nullable=False),
+        sa.Column("dataset_id", sa.BigInteger(), nullable=True),
+        sa.Column("consumption_kw", sa.Double(), nullable=True),
+        sa.Column("consumption_kwh", sa.Double(), nullable=True),
+        sa.Column("consumption_euros", sa.Numeric(precision=14, scale=2), nullable=True),
+        sa.Column("voltage_v", sa.Double(), nullable=True),
+        sa.Column("current_a", sa.Double(), nullable=True),
+        sa.Column("power_factor", sa.Double(), nullable=True),
+        sa.Column("temperature_celsius", sa.Double(), nullable=True),
+        sa.Column("humidity_percent", sa.Double(), nullable=True),
+        sa.Column("solar_irradiance_wm2", sa.Double(), nullable=True),
+        sa.Column("is_working_hours", sa.Boolean(), nullable=True),
+        sa.Column("data_quality", sa.Text(), nullable=True),
+        sa.Column("null_reasons", postgresql.ARRAY(sa.Text()), nullable=True),
+        sa.Column(
+            "imputed_values", postgresql.JSONB(none_as_null=True, astext_type=sa.Text()), nullable=True
+        ),
+        sa.Column("imputation_method", sa.Text(), nullable=True),
+        sa.Column(
+            "ingested_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.text("now()"),
+            nullable=False,
+        ),
+        sa.Column(
+            "raw_data", postgresql.JSONB(none_as_null=True, astext_type=sa.Text()), nullable=False
+        ),
+        sa.CheckConstraint(
+            "(source = 'csv' AND dataset_id IS NOT NULL) OR (source IN ('api_current', 'api_history') AND dataset_id IS NULL)",
+            name="ck_reading_dataset_source",
+        ),
+        sa.CheckConstraint(
+            "data_quality IS NULL OR data_quality IN ('good', 'partial', 'degraded', 'critical')",
+            name="ck_reading_quality",
+        ),
+        sa.CheckConstraint(
+            "source IN ('csv', 'api_current', 'api_history')", name="ck_reading_source"
+        ),
+        sa.CheckConstraint(
+            "(imputed_values IS NULL AND imputation_method IS NULL) OR (imputed_values IS NOT NULL AND imputation_method IS NOT NULL)",
+            name="ck_reading_imputation",
+        ),
+        sa.ForeignKeyConstraint(
+            ["dataset_id"], ["dataset.dataset_id"], name="fk_reading_dataset", ondelete="RESTRICT"
+        ),
+        sa.ForeignKeyConstraint(
+            ["site_id"], ["site.site_id"], name="fk_reading_site", ondelete="RESTRICT"
+        ),
+        sa.PrimaryKeyConstraint("reading_id", "timestamp"),
+    )
+    op.create_index("ix_reading_dataset_id", "reading", ["dataset_id"], unique=False)
+    op.create_index(
+        "ix_reading_site_timestamp", "reading", ["site_id", "timestamp"], unique=False
+    )
+    op.create_index(
+        "uq_reading_source",
+        "reading",
+        ["site_id", "timestamp", "source", sa.literal_column("coalesce(dataset_id, 0)")],
+        unique=True,
+    )
+    op.execute(
+        "SELECT create_hypertable('reading', by_range('timestamp'), create_default_indexes => FALSE)"
+    )
+    op.create_table(
+        "alert",
+        sa.Column("alert_id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("source_alert_id", sa.Text(), nullable=False),
+        sa.Column("site_id", sa.Text(), nullable=False),
+        sa.Column("source", sa.Text(), nullable=False),
+        sa.Column("timestamp", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("type", sa.Text(), nullable=False),
+        sa.Column("severity", sa.Text(), nullable=False),
+        sa.Column("message", sa.Text(), nullable=False),
+        sa.Column("value", sa.Double(), nullable=True),
+        sa.Column("threshold", sa.Double(), nullable=True),
+        sa.Column("metric", sa.Text(), nullable=True),
+        sa.Column("prediction_id", sa.BigInteger(), nullable=True),
+        sa.Column(
+            "raw_data", postgresql.JSONB(none_as_null=True, astext_type=sa.Text()), nullable=False
+        ),
+        sa.CheckConstraint(
+            "severity IN ('low', 'medium', 'high', 'critical')", name="ck_alert_severity"
+        ),
+        sa.CheckConstraint("source IN ('api_mock', 'enervision')", name="ck_alert_source"),
+        sa.CheckConstraint(
+            "type IN ('spike', 'threshold', 'anomaly', 'outage', 'sensor')", name="ck_alert_type"
+        ),
+        sa.ForeignKeyConstraint(
+            ["prediction_id", "site_id"],
+            ["prediction.prediction_id", "prediction.site_id"],
+            name="fk_alert_prediction_site",
+            ondelete="RESTRICT",
+        ),
+        sa.ForeignKeyConstraint(
+            ["site_id"], ["site.site_id"], name="fk_alert_site", ondelete="RESTRICT"
+        ),
+        sa.PrimaryKeyConstraint("alert_id"),
+        sa.UniqueConstraint(
+            "source", "site_id", "source_alert_id", name="uq_alert_source_reference"
+        ),
+    )
+    op.create_index("ix_alert_site_timestamp", "alert", ["site_id", "timestamp"], unique=False)
+    op.create_table(
+        "recommendation",
+        sa.Column("recommendation_id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("alert_id", sa.BigInteger(), nullable=False),
+        sa.Column("action", sa.Text(), nullable=False),
+        sa.Column("explanation", sa.Text(), nullable=False),
+        sa.Column("rule_reference", sa.Text(), nullable=False),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.text("now()"),
+            nullable=False,
+        ),
+        sa.ForeignKeyConstraint(
+            ["alert_id"], ["alert.alert_id"], name="fk_recommendation_alert", ondelete="RESTRICT"
+        ),
+        sa.PrimaryKeyConstraint("recommendation_id"),
+        sa.UniqueConstraint("alert_id", "rule_reference", name="uq_recommendation_alert_rule"),
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    op.drop_table("recommendation")
+    op.drop_table("alert")
+    op.drop_table("reading")
+    op.drop_table("prediction")
+    op.drop_table("site")
+    op.drop_table("dataset")

apps/backend/app/api/deps.py

@@ -21,11 +21,21 @@ from app.core.roles import AccountKind, Role, has_at_least
 from app.core.security import TokenExpiredError, TokenInvalidError, TokenPolicy
 from app.core.security import decode_access_token as decode_token
 from app.db.session import get_session
+from app.repositories.alert import AlertRepository
 from app.repositories.audit_log import AuditLogRepository
 from app.repositories.login_attempt import LoginAttemptRepository
+from app.repositories.reading import ReadingRepository
+from app.repositories.recommendation import RecommendationRepository
 from app.repositories.refresh_token import RefreshTokenRepository
+from app.repositories.site import SiteRepository
 from app.repositories.user import UserRepository
+from app.services.alert import AlertService
 from app.services.auth import AuthService, LoginPolicy
+from app.services.reading import ReadingService
+from app.services.recommendation import RecommendationService
+from app.services.sensor import SensorService
+from app.services.site import SiteService
+from app.services.stats import StatsService
 from app.services.user import UserService
 
 SessionDep = Annotated[AsyncSession, Depends(get_session)]
@@ -131,6 +141,48 @@ def get_user_service(
 UserServiceDep = Annotated[UserService, Depends(get_user_service)]
 
 
+def get_site_service(session: SessionDep) -> SiteService:
+    return SiteService(sites=SiteRepository(session), readings=ReadingRepository(session))
+
+
+SiteServiceDep = Annotated[SiteService, Depends(get_site_service)]
+
+
+def get_alert_service(session: SessionDep) -> AlertService:
+    return AlertService(alerts=AlertRepository(session))
+
+
+AlertServiceDep = Annotated[AlertService, Depends(get_alert_service)]
+
+
+def get_recommendation_service(session: SessionDep) -> RecommendationService:
+    return RecommendationService(recommendations=RecommendationRepository(session))
+
+
+RecommendationServiceDep = Annotated[RecommendationService, Depends(get_recommendation_service)]
+
+
+def get_stats_service(session: SessionDep) -> StatsService:
+    return StatsService(sites=SiteRepository(session), readings=ReadingRepository(session))
+
+
+StatsServiceDep = Annotated[StatsService, Depends(get_stats_service)]
+
+
+def get_reading_service(session: SessionDep) -> ReadingService:
+    return ReadingService(readings=ReadingRepository(session))
+
+
+ReadingServiceDep = Annotated[ReadingService, Depends(get_reading_service)]
+
+
+def get_sensor_service(session: SessionDep) -> SensorService:
+    return SensorService(sites=SiteRepository(session), readings=ReadingRepository(session))
+
+
+SensorServiceDep = Annotated[SensorService, Depends(get_sensor_service)]
+
+
 async def get_current_principal(
     credentials: CredentialsDep,
     session: SessionDep,

apps/backend/app/api/openapi.py

@@ -0,0 +1,166 @@
+# Piège : `cookie_de_rafraichissement` est purement documentaire, d'où son `auto_error=False`.
+# Avec la valeur par défaut, FastAPI répondrait 403 avant d'atteindre `lit_le_cookie()`, et
+# `/auth/refresh` cesserait de rendre le 401 que le frontend attend.
+
+from typing import Any, Final
+
+from fastapi.security import APIKeyCookie
+
+from app.core.config import REFRESH_COOKIE_DEFAUT
+from app.schemas.errors import ErrorResponse, InternalErrorResponse, ValidationErrorResponse
+
+Reponses = dict[int | str, dict[str, Any]]
+
+SUMMARY: Final = "Collecte, analyse et restitution de séries temporelles énergétiques."
+
+DESCRIPTION: Final = """
+Toutes les routes sont préfixées par `/api/v1`.
+
+**Authentification.** Le jeton d'accès se présente dans l'en-tête `Authorization: Bearer ...`.
+Le jeton de rafraîchissement est un cookie `HttpOnly` que le code client ne voit jamais : il
+suffit d'émettre les requêtes avec les identifiants de session. `POST /auth/refresh` rend un
+nouveau jeton d'accès et fait tourner le cookie.
+
+**Rôles.** `lecteur`, puis `operateur`, puis `admin`. Chaque rôle couvre les droits du
+précédent.
+
+**Erreurs.** Le corps porte toujours une clé `detail`. Un `403` dont le `detail` vaut
+`password_change_required` n'est pas un refus de droits : il exige le changement du mot de passe
+provisoire avant toute autre action.
+
+Le parcours de session complet est décrit dans
+`docs/architecture/31-contrat-authentification.md`.
+"""
+
+TAGS: Final[list[dict[str, Any]]] = [
+    {
+        "name": "health",
+        "description": (
+            "Sondes d'infrastructure, publiques. `live` prouve que le processus répond, `ready` "
+            "que la base répond et que l'extension TimescaleDB est chargée."
+        ),
+    },
+    {
+        "name": "auth",
+        "description": (
+            "Ouverture, rotation et fermeture de session, et changement de son propre mot de passe."
+        ),
+    },
+    {
+        "name": "users",
+        "description": "Administration des comptes. Réservé au rôle `admin`.",
+    },
+    {
+        "name": "sites",
+        "description": "Consultation du parc de sites. Accessible à partir du rôle `lecteur`.",
+    },
+    {
+        "name": "alerts",
+        "description": "Consultation des alertes de consommation. Accessible à partir du rôle "
+        "`lecteur`.",
+    },
+    {
+        "name": "recommendations",
+        "description": (
+            "Consultation des recommandations issues des alertes. Accessible à partir du rôle "
+            "`lecteur`."
+        ),
+    },
+    {
+        "name": "stats",
+        "description": "Statistiques agrégées de consommation. Accessible à partir du rôle "
+        "`lecteur`.",
+    },
+    {
+        "name": "readings",
+        "description": (
+            "Historique des lectures de consommation. Fenêtre temporelle plafonnée à 90 jours, "
+            "24 dernières heures par défaut si `start`/`end` sont omis. Accessible à partir du "
+            "rôle `lecteur`."
+        ),
+    },
+    {
+        "name": "sensors",
+        "description": "État de santé des capteurs par site. Réservé au rôle `admin`.",
+    },
+]
+
+cookie_de_rafraichissement = APIKeyCookie(
+    name=REFRESH_COOKIE_DEFAUT,
+    scheme_name="Cookie de rafraîchissement",
+    description=(
+        "Cookie `HttpOnly` posé par `/auth/login` et tourné par `/auth/refresh`. Il prend le "
+        "préfixe `__Secure-` dès que l'API tourne derrière TLS, et n'est émis que vers "
+        "`/api/v1/auth`."
+    ),
+    auto_error=False,
+)
+
+# Le 422 n'est déclaré que sur les routes qui acceptent un corps ou un paramètre : ailleurs,
+# aucune validation ne peut échouer et l'annoncer serait faux.
+REPONSE_VALIDATION: Final[Reponses] = {
+    422: {
+        "model": ValidationErrorResponse,
+        "description": (
+            "Corps invalide. Le détail nomme le champ fautif et le type d'erreur, jamais la "
+            "valeur envoyée."
+        ),
+    },
+}
+
+REPONSE_SERVEUR: Final[Reponses] = {
+    500: {
+        "model": InternalErrorResponse,
+        "description": (
+            "Erreur interne. `correlation` identifie la trace côté serveur, qui n'est pas "
+            "renvoyée au client."
+        ),
+    },
+}
+
+REPONSE_INDISPONIBLE: Final[Reponses] = {
+    503: {
+        "model": ErrorResponse,
+        "description": "Base injoignable, ou extension TimescaleDB absente de la base.",
+    },
+}
+
+REPONSES_AUTHENTIFIEES: Final[Reponses] = {
+    401: {
+        "model": ErrorResponse,
+        "description": (
+            "Jeton absent, illisible, périmé, ou rendu caduc par un changement de rôle ou une "
+            "désactivation. L'en-tête `WWW-Authenticate` porte la cause dans `error=`."
+        ),
+    },
+}
+
+REPONSES_ADMIN: Final[Reponses] = {
+    **REPONSES_AUTHENTIFIEES,
+    403: {
+        "model": ErrorResponse,
+        "description": (
+            "Droits insuffisants, ou mot de passe provisoire à changer quand `detail` vaut "
+            "`password_change_required`."
+        ),
+    },
+}
+
+# `lecteur` est le rôle minimum : `require_role` n'y refuse jamais un 403 pour droits
+# insuffisants, seulement pour le mot de passe provisoire.
+REPONSES_LECTEUR: Final[Reponses] = {
+    **REPONSES_AUTHENTIFIEES,
+    403: {
+        "model": ErrorResponse,
+        "description": (
+            "Mot de passe provisoire à changer (`detail` vaut `password_change_required`)."
+        ),
+    },
+}
+
+REPONSE_ORIGINE_REFUSEE: Final[Reponses] = {
+    403: {
+        "model": ErrorResponse,
+        "description": "Origine non autorisée (protection CSRF de `require_trusted_origin`).",
+    },
+}

apps/backend/app/api/v1/endpoints/alerts.py

@@ -0,0 +1,23 @@
+from fastapi import APIRouter
+
+from app.api.deps import AlertServiceDep, LecteurDep
+from app.api.openapi import REPONSE_VALIDATION
+from app.schemas.alert import AlertResponse, AlertSeverity
+
+router = APIRouter()
+
+
+@router.get(
+    "",
+    response_model=list[AlertResponse],
+    summary="Liste les alertes",
+    responses=REPONSE_VALIDATION,
+)
+async def list_alerts(
+    _: LecteurDep,
+    service: AlertServiceDep,
+    site_id: str | None = None,
+    severity: AlertSeverity | None = None,
+) -> list[AlertResponse]:
+    alertes = await service.list_all(site_id=site_id, severity=severity)
+    return [AlertResponse.model_validate(alerte) for alerte in alertes]

apps/backend/app/api/v1/endpoints/auth.py

@@ -11,6 +11,13 @@ from app.api.deps import (
     get_client_ip,
     require_trusted_origin,
 )
+from app.api.openapi import (
+    REPONSE_ORIGINE_REFUSEE,
+    REPONSE_VALIDATION,
+    REPONSES_AUTHENTIFIEES,
+    Reponses,
+    cookie_de_rafraichissement,
+)
 from app.core.cookies import RefreshCookie, cookie_name
 from app.core.logging import get_logger
 from app.schemas.auth import (
@@ -19,6 +26,7 @@ from app.schemas.auth import (
     PrincipalResponse,
     TokenResponse,
 )
+from app.schemas.errors import ErrorResponse
 from app.services.auth import (
     AuthenticatedSession,
     InvalidCredentialsError,
@@ -32,6 +40,51 @@ logger = get_logger(__name__)
 DETAIL_IDENTIFIANTS = "Identifiants invalides"
 DETAIL_SESSION = "Session invalide"
 
+REPONSES_LOGIN: Reponses = {
+    **REPONSE_VALIDATION,
+    401: {
+        "model": ErrorResponse,
+        "description": (
+            "Identifiants faux, compte inconnu ou compte désactivé. Le message est le même dans "
+            "les trois cas, et n'apprend donc rien sur l'existence du compte."
+        ),
+    },
+    429: {
+        "model": ErrorResponse,
+        "description": "Trop de tentatives sur cette fenêtre glissante.",
+        "headers": {
+            "Retry-After": {
+                "description": "Secondes à attendre avant une nouvelle tentative.",
+                "schema": {"type": "integer"},
+            }
+        },
+    },
+}
+
+REPONSES_REFRESH: Reponses = {
+    **REPONSE_ORIGINE_REFUSEE,
+    401: {
+        "model": ErrorResponse,
+        "description": (
+            "Cookie absent, session expirée, révoquée, ou jeton déjà tourné. Dans ce dernier cas "
+            "toute la famille de sessions est révoquée et le cookie est effacé avec la réponse."
+        ),
+    },
+}
+
+REPONSES_LOGOUT: Reponses = {**REPONSE_ORIGINE_REFUSEE}
+
+REPONSES_LOGOUT_ALL: Reponses = {**REPONSES_AUTHENTIFIEES, **REPONSE_ORIGINE_REFUSEE}
+
+REPONSES_MOT_DE_PASSE: Reponses = {
+    **REPONSE_VALIDATION,
+    **REPONSE_ORIGINE_REFUSEE,
+    401: {
+        "model": ErrorResponse,
+        "description": "Jeton d'accès invalide, ou mot de passe courant faux.",
+    },
+}
+
 
 def repond(
     response: Response, settings: SettingsDep, session: AuthenticatedSession
@@ -61,7 +114,12 @@ def lit_le_cookie(request: Request, settings: SettingsDep) -> str:
     return secret
 
 
-@router.post("/login", response_model=TokenResponse, summary="Ouvre une session")
+@router.post(
+    "/login",
+    response_model=TokenResponse,
+    summary="Ouvre une session",
+    responses=REPONSES_LOGIN,
+)
 async def login(
     payload: LoginRequest,
     request: Request,
@@ -98,7 +156,8 @@ async def login(
     "/refresh",
     response_model=TokenResponse,
     summary="Fait tourner la session",
-    dependencies=[Depends(require_trusted_origin)],
+    dependencies=[Depends(require_trusted_origin), Depends(cookie_de_rafraichissement)],
+    responses=REPONSES_REFRESH,
 )
 async def refresh(
     request: Request,
@@ -133,7 +192,8 @@ async def refresh(
     "/logout",
     status_code=status.HTTP_204_NO_CONTENT,
     summary="Ferme la session courante",
-    dependencies=[Depends(require_trusted_origin)],
+    dependencies=[Depends(require_trusted_origin), Depends(cookie_de_rafraichissement)],
+    responses=REPONSES_LOGOUT,
 )
 async def logout(
     request: Request, response: Response, settings: SettingsDep, service: AuthServiceDep
@@ -150,6 +210,7 @@ async def logout(
     status_code=status.HTTP_204_NO_CONTENT,
     summary="Ferme toutes les sessions du compte",
     dependencies=[Depends(require_trusted_origin)],
+    responses=REPONSES_LOGOUT_ALL,
 )
 async def logout_all(
     principal: CurrentPrincipalDep,
@@ -163,7 +224,12 @@ async def logout_all(
     response.delete_cookie(**RefreshCookie.expired(settings).as_deletion_kwargs())
 
 
-@router.get("/me", response_model=PrincipalResponse, summary="Décrit le compte connecté")
+@router.get(
+    "/me",
+    response_model=PrincipalResponse,
+    summary="Décrit le compte connecté",
+    responses=REPONSES_AUTHENTIFIEES,
+)
 async def me(principal: CurrentPrincipalDep) -> PrincipalResponse:
     return PrincipalResponse.from_principal(principal)
 
@@ -173,6 +239,7 @@ async def me(principal: CurrentPrincipalDep) -> PrincipalResponse:
     response_model=TokenResponse,
     summary="Change son propre mot de passe",
     dependencies=[Depends(require_trusted_origin)],
+    responses=REPONSES_MOT_DE_PASSE,
 )
 async def change_password(
     payload: PasswordChangeRequest,

apps/backend/app/api/v1/endpoints/health.py

@@ -3,16 +3,17 @@ from sqlalchemy import text
 from sqlalchemy.exc import SQLAlchemyError
 
 from app.api.deps import SessionDep, SettingsDep
+from app.api.openapi import REPONSE_INDISPONIBLE
 from app.core.logging import get_logger
 from app.schemas.health import LivenessStatus, ReadinessStatus
 
 logger = get_logger(__name__)
-router = APIRouter(tags=["health"])
+router = APIRouter()
 
 TIMESCALEDB_VERSION = text("SELECT extversion FROM pg_extension WHERE extname = 'timescaledb'")
 
 
-@router.get("/live", summary="Sonde de vivacite")
+@router.get("/live", summary="Sonde de vivacité")
 async def liveness(settings: SettingsDep) -> LivenessStatus:
     return LivenessStatus(
         status="ok",
@@ -22,11 +23,13 @@ async def liveness(settings: SettingsDep) -> LivenessStatus:
     )
 
 
-@router.get("/ready", summary="Sonde de disponibilite")
+@router.get("/ready", summary="Sonde de disponibilité", responses=REPONSE_INDISPONIBLE)
 async def readiness(session: SessionDep) -> ReadinessStatus:
     try:
         version: str | None = await session.scalar(TIMESCALEDB_VERSION)
-    except SQLAlchemyError, OSError:
+    # `# fmt: skip` contourne un bug de ruff format 0.16.7 : il retire les parenthèses de ce
+    # `except` à deux types, ce qui produit une syntaxe invalide (`except A, B:`).
+    except (SQLAlchemyError, OSError):  # fmt: skip
         logger.exception("Base de données injoignable")
         raise HTTPException(
             status_code=status.HTTP_503_SERVICE_UNAVAILABLE,

apps/backend/app/api/v1/endpoints/readings.py

@@ -0,0 +1,54 @@
+from datetime import datetime
+
+from fastapi import APIRouter, HTTPException, Query, status
+
+from app.api.deps import LecteurDep, ReadingServiceDep
+from app.api.openapi import REPONSE_VALIDATION, Reponses
+from app.schemas.errors import ErrorResponse
+from app.schemas.reading import ReadingResponse
+from app.services.reading import FenetreInverseeError, FenetreTropLargeError
+
+router = APIRouter()
+
+REPONSES_FENETRE: Reponses = {
+    **REPONSE_VALIDATION,
+    400: {
+        "model": ErrorResponse,
+        "description": (
+            "Fenêtre temporelle invalide : `start` postérieur ou égal à `end`, ou écart entre "
+            "les deux supérieur à 90 jours."
+        ),
+    },
+}
+
+
+@router.get(
+    "",
+    response_model=list[ReadingResponse],
+    summary="Liste l'historique des lectures",
+    responses=REPONSES_FENETRE,
+)
+async def list_readings(
+    _: LecteurDep,
+    service: ReadingServiceDep,
+    site_id: str | None = None,
+    start: datetime | None = None,
+    end: datetime | None = None,
+    limit: int = Query(500, ge=1, le=2000),
+    offset: int = Query(0, ge=0),
+) -> list[ReadingResponse]:
+    try:
+        lectures = await service.list_history(
+            site_id=site_id, start=start, end=end, limit=limit, offset=offset
+        )
+    except FenetreInverseeError as erreur:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="`start` doit être strictement antérieur à `end`",
+        ) from erreur
+    except FenetreTropLargeError as erreur:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="L'écart entre `start` et `end` ne peut pas dépasser 90 jours",
+        ) from erreur
+    return [ReadingResponse.model_validate(lecture) for lecture in lectures]

apps/backend/app/api/v1/endpoints/recommendations.py

@@ -0,0 +1,40 @@
+from fastapi import APIRouter, HTTPException, status
+
+from app.api.deps import LecteurDep, RecommendationServiceDep
+from app.api.openapi import REPONSE_VALIDATION, Reponses
+from app.schemas.errors import ErrorResponse
+from app.schemas.recommendation import RecommendationResponse
+from app.services.recommendation import RecommendationNotFoundError
+
+router = APIRouter()
+
+REPONSES_INTROUVABLE: Reponses = {
+    **REPONSE_VALIDATION,
+    404: {"model": ErrorResponse, "description": "Aucune recommandation ne porte cet identifiant."},
+}
+
+
+@router.get("", response_model=list[RecommendationResponse], summary="Liste les recommandations")
+async def list_recommendations(
+    _: LecteurDep, service: RecommendationServiceDep
+) -> list[RecommendationResponse]:
+    recommendations = await service.list_all()
+    return [RecommendationResponse.model_validate(r) for r in recommendations]
+
+
+@router.get(
+    "/{recommendation_id}",
+    response_model=RecommendationResponse,
+    summary="Décrit une recommandation",
+    responses=REPONSES_INTROUVABLE,
+)
+async def get_recommendation(
+    recommendation_id: int, _: LecteurDep, service: RecommendationServiceDep
+) -> RecommendationResponse:
+    try:
+        recommendation = await service.get_by_id(recommendation_id)
+    except RecommendationNotFoundError as erreur:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Recommandation introuvable"
+        ) from erreur
+    return RecommendationResponse.model_validate(recommendation)

apps/backend/app/api/v1/endpoints/sensors.py

@@ -0,0 +1,16 @@
+from fastapi import APIRouter
+
+from app.api.deps import AdminDep, SensorServiceDep
+from app.schemas.sensor import SensorStatusResponse
+
+router = APIRouter()
+
+
+@router.get(
+    "/status",
+    response_model=SensorStatusResponse,
+    summary="État de santé des capteurs par site",
+)
+async def get_status(_: AdminDep, service: SensorServiceDep) -> SensorStatusResponse:
+    etat = await service.status()
+    return SensorStatusResponse.model_validate(etat)

apps/backend/app/api/v1/endpoints/sites.py

@@ -0,0 +1,52 @@
+from fastapi import APIRouter, HTTPException, status
+
+from app.api.deps import LecteurDep, SiteServiceDep
+from app.api.openapi import REPONSE_VALIDATION, Reponses
+from app.schemas.errors import ErrorResponse
+from app.schemas.site import SiteCurrentResponse, SiteResponse
+from app.services.site import SiteNotFoundError
+
+router = APIRouter()
+
+REPONSES_INTROUVABLE: Reponses = {
+    **REPONSE_VALIDATION,
+    404: {"model": ErrorResponse, "description": "Aucun site ne porte cet identifiant."},
+}
+
+
+@router.get("", response_model=list[SiteResponse], summary="Liste les sites")
+async def list_sites(_: LecteurDep, service: SiteServiceDep) -> list[SiteResponse]:
+    sites = await service.list_all()
+    return [SiteResponse.model_validate(site) for site in sites]
+
+
+@router.get(
+    "/{site_id}",
+    response_model=SiteResponse,
+    summary="Décrit un site",
+    responses=REPONSES_INTROUVABLE,
+)
+async def get_site(site_id: str, _: LecteurDep, service: SiteServiceDep) -> SiteResponse:
+    try:
+        site = await service.get_by_id(site_id)
+    except SiteNotFoundError as erreur:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Site introuvable"
+        ) from erreur
+    return SiteResponse.model_validate(site)
+
+
+@router.get(
+    "/{site_id}/current",
+    response_model=SiteCurrentResponse,
+    summary="Dernière mesure d'un site",
+    responses=REPONSES_INTROUVABLE,
+)
+async def get_current(site_id: str, _: LecteurDep, service: SiteServiceDep) -> SiteCurrentResponse:
+    try:
+        actuel = await service.current(site_id)
+    except SiteNotFoundError as erreur:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Site introuvable"
+        ) from erreur
+    return SiteCurrentResponse.model_validate(actuel)

apps/backend/app/api/v1/endpoints/stats.py

@@ -0,0 +1,16 @@
+from fastapi import APIRouter
+
+from app.api.deps import LecteurDep, StatsServiceDep
+from app.schemas.stats import StatsSummaryResponse
+
+router = APIRouter()
+
+
+@router.get(
+    "/summary",
+    response_model=StatsSummaryResponse,
+    summary="Résume la consommation instantanée du parc",
+)
+async def get_summary(_: LecteurDep, service: StatsServiceDep) -> StatsSummaryResponse:
+    resume = await service.summary()
+    return StatsSummaryResponse.model_validate(resume)

apps/backend/app/api/v1/endpoints/users.py

@@ -3,7 +3,9 @@ from uuid import UUID
 from fastapi import APIRouter, HTTPException, Response, status
 
 from app.api.deps import AdminDep, UserServiceDep
+from app.api.openapi import REPONSE_VALIDATION, Reponses
 from app.core.logging import get_logger
+from app.schemas.errors import ErrorResponse
 from app.schemas.user import (
     TemporaryPasswordResponse,
     UserCreateRequest,
@@ -15,6 +17,28 @@ from app.services.user import EmailAlreadyUsedError, LastAdminError, UserNotFoun
 router = APIRouter()
 logger = get_logger(__name__)
 
+REPONSES_CREATION: Reponses = {
+    **REPONSE_VALIDATION,
+    409: {"model": ErrorResponse, "description": "Adresse déjà portée par un autre compte."},
+}
+
+REPONSES_INTROUVABLE: Reponses = {
+    **REPONSE_VALIDATION,
+    404: {"model": ErrorResponse, "description": "Aucun compte ne porte cet identifiant."},
+}
+
+REPONSES_MODIFICATION: Reponses = {
+    **REPONSES_INTROUVABLE,
+    400: {"model": ErrorResponse, "description": "Corps vide, aucune modification demandée."},
+    409: {
+        "model": ErrorResponse,
+        "description": (
+            "L'opération laisserait la plateforme sans administrateur actif, qu'il s'agisse de "
+            "rétrograder le dernier ou de le désactiver."
+        ),
+    },
+}
+
 
 @router.get("", response_model=list[UserResponse], summary="Liste les comptes")
 async def list_users(_: AdminDep, service: UserServiceDep) -> list[UserResponse]:
@@ -27,6 +51,7 @@ async def list_users(_: AdminDep, service: UserServiceDep) -> list[UserResponse]
     response_model=TemporaryPasswordResponse,
     status_code=status.HTTP_201_CREATED,
     summary="Crée un compte avec un mot de passe provisoire",
+    responses=REPONSES_CREATION,
 )
 async def create_user(
     payload: UserCreateRequest,
@@ -55,7 +80,12 @@ async def create_user(
     )
 
 
-@router.patch("/{user_id}", response_model=UserResponse, summary="Change le rôle ou l'activation")
+@router.patch(
+    "/{user_id}",
+    response_model=UserResponse,
+    summary="Change le rôle ou l'activation",
+    responses=REPONSES_MODIFICATION,
+)
 async def update_user(
     user_id: UUID,
     payload: UserUpdateRequest,
@@ -92,6 +122,7 @@ async def update_user(
     "/{user_id}/password-reset",
     response_model=TemporaryPasswordResponse,
     summary="Réinitialise le mot de passe et ferme les sessions",
+    responses=REPONSES_INTROUVABLE,
 )
 async def reset_password(
     user_id: UUID, acteur: AdminDep, service: UserServiceDep, response: Response

apps/backend/app/api/v1/router.py

@@ -1,8 +1,36 @@
 from fastapi import APIRouter
 
-from app.api.v1.endpoints import auth, health, users
+from app.api.openapi import REPONSE_SERVEUR, REPONSES_ADMIN, REPONSES_LECTEUR
+from app.api.v1.endpoints import (
+    alerts,
+    auth,
+    health,
+    readings,
+    recommendations,
+    sensors,
+    sites,
+    stats,
+    users,
+)
 
-api_router = APIRouter()
+api_router = APIRouter(responses=REPONSE_SERVEUR)
 api_router.include_router(health.router, prefix="/health", tags=["health"])
 api_router.include_router(auth.router, prefix="/auth", tags=["auth"])
-api_router.include_router(users.router, prefix="/users", tags=["users"])
+api_router.include_router(users.router, prefix="/users", tags=["users"], responses=REPONSES_ADMIN)
+api_router.include_router(sites.router, prefix="/sites", tags=["sites"], responses=REPONSES_LECTEUR)
+api_router.include_router(
+    alerts.router, prefix="/alerts", tags=["alerts"], responses=REPONSES_LECTEUR
+)
+api_router.include_router(
+    recommendations.router,
+    prefix="/recommendations",
+    tags=["recommendations"],
+    responses=REPONSES_LECTEUR,
+)
+api_router.include_router(stats.router, prefix="/stats", tags=["stats"], responses=REPONSES_LECTEUR)
+api_router.include_router(
+    readings.router, prefix="/readings", tags=["readings"], responses=REPONSES_LECTEUR
+)
+api_router.include_router(
+    sensors.router, prefix="/sensors", tags=["sensors"], responses=REPONSES_ADMIN
+)

apps/backend/app/cli.py

@@ -7,18 +7,25 @@
 
 import argparse
 import asyncio
+import json
 import secrets
 import sys
 from getpass import getpass
+from pathlib import Path
+from typing import Any
+
+from pydantic import SecretStr
 
 from app.core.config import Settings, get_settings
 from app.core.hashing import build_hasher
 from app.core.roles import Role
 from app.db.session import get_session_factory
+from app.main import create_app
 from app.repositories.user import UserRepository
 
 LONGUEUR_MOT_DE_PASSE_GENERE = 24
 LONGUEUR_MINIMALE = 12
+CHEMIN_CONTRAT = Path(__file__).resolve().parent.parent / "openapi.json"
 
 
 async def create_admin(
@@ -55,6 +62,35 @@ async def create_admin(
     )
 
 
+# Piège : le schéma ne doit dépendre ni du `.env` du poste ni des variables `APP_*`, sinon le
+# fichier versionné changerait de machine en machine et le test de dérive deviendrait un oracle
+# de configuration locale. Tout ce qui atteint le schéma est donc posé ici, `_env_file` compris.
+def settings_du_contrat() -> Settings:
+    return Settings(
+        _env_file=None,
+        name="EnerVision API",
+        version="0.1.0",
+        env="local",
+        api_prefix="/api/v1",
+        secret_key=SecretStr("contrat-openapi-sans-effet-sur-le-schema"),
+        database_url="postgresql+asyncpg://openapi:contrat@localhost:5432/enervision",
+    )
+
+
+def schema_du_contrat() -> dict[str, Any]:
+    schema: dict[str, Any] = create_app(settings_du_contrat()).openapi()
+    return schema
+
+
+def rend_le_contrat() -> str:
+    return json.dumps(schema_du_contrat(), indent=2, ensure_ascii=False) + "\n"
+
+
+def export_openapi(destination: Path) -> str:
+    destination.write_text(rend_le_contrat(), encoding="utf-8")
+    return f"Contrat OpenAPI écrit dans {destination}"
+
+
 def build_parser() -> argparse.ArgumentParser:
     parser = argparse.ArgumentParser(prog="python -m app.cli", description="Outils EnerVision")
     sous_commandes = parser.add_subparsers(dest="commande", required=True)
@@ -67,6 +103,11 @@ def build_parser() -> argparse.ArgumentParser:
     admin.add_argument(
         "--force", action="store_true", help="Crée le compte même si un administrateur existe"
     )
+
+    contrat = sous_commandes.add_parser(
+        "export-openapi", help="Écrit le contrat OpenAPI sur disque"
+    )
+    contrat.add_argument("--output", default=str(CHEMIN_CONTRAT))
     return parser
 
 
@@ -86,6 +127,11 @@ def read_password(*, generate: bool) -> str:
 
 def main(argv: list[str] | None = None) -> int:
     arguments = build_parser().parse_args(argv)
+
+    if arguments.commande == "export-openapi":
+        print(export_openapi(Path(arguments.output)))
+        return 0
+
     mot_de_passe = read_password(generate=arguments.generate)
 
     succes, message = asyncio.run(

apps/backend/app/core/config.py

@@ -8,6 +8,7 @@ Environment = Literal["local", "dev", "staging", "prod"]
 SameSite = Literal["lax", "strict", "none"]
 
 SECRET_KEY_MIN_LENGTH = 32
+REFRESH_COOKIE_DEFAUT = "ev_refresh"
 SENTINELLES_INTERDITES = frozenset(
     {"change_me", "changeme", "secret", "secret-de-test", "changez-moi", "todo"}
 )
@@ -38,7 +39,7 @@ class Settings(BaseSettings):
     access_token_ttl_seconds: int = Field(default=900, ge=60, le=3600)
     refresh_token_ttl_seconds: int = Field(default=604800, ge=3600, le=2592000)
 
-    refresh_cookie_name: str = "ev_refresh"
+    refresh_cookie_name: str = REFRESH_COOKIE_DEFAUT
     cookie_path: str = "/api/v1/auth"
     cookie_samesite: SameSite = "strict"
     cookie_secure: bool | None = None

apps/backend/app/etl/historical_import.py

@@ -0,0 +1,621 @@
+from __future__ import annotations
+
+import argparse
+import asyncio
+import hashlib
+import json
+from pathlib import Path
+from typing import Any, cast
+
+import pandas as pd
+from sqlalchemy import text
+from sqlalchemy.ext.asyncio import AsyncConnection, create_async_engine
+
+from app.core.config import get_settings
+
+REQUIRED_COLUMNS = {
+    "timestamp",
+    "site_id",
+    "site_type",
+    "site_name",
+    "consumption_kwh",
+    "consumption_euros",
+    "temperature_celsius",
+    "humidity_percent",
+    "solar_irradiance_wm2",
+    "hour",
+    "day_of_week",
+    "day_name",
+    "month",
+    "is_weekend",
+    "is_working_hours",
+}
+
+MEASURE_COLUMNS = [
+    "consumption_kwh",
+    "consumption_euros",
+    "temperature_celsius",
+    "humidity_percent",
+    "solar_irradiance_wm2",
+]
+
+SOURCE_NAME = "csv"
+
+
+def compute_sha256(path: Path) -> str:
+    """Calcule l'empreinte SHA-256 du fichier source."""
+    sha256 = hashlib.sha256()
+
+    with path.open("rb") as source:
+        for block in iter(lambda: source.read(1024 * 1024), b""):
+            sha256.update(block)
+
+    return sha256.hexdigest()
+
+
+def load_metadata(path: Path) -> dict[str, Any]:
+    """Charge les métadonnées fournies avec le dataset."""
+    with path.open("r", encoding="utf-8") as source:
+        metadata = json.load(source)
+
+    if not isinstance(metadata, dict):
+        raise ValueError("Le fichier de métadonnées doit contenir un objet JSON.")
+
+    return cast(dict[str, Any], metadata)
+
+
+def classify_quality(
+    row: dict[str, Any],
+) -> tuple[str, list[str]]:
+    """
+    Déduit une qualité technique à partir des champs manquants.
+
+    Les valeurs NULL sont conservées. On ne cherche pas ici à
+    déterminer la cause physique exacte de leur absence.
+    """
+    missing = [column for column in MEASURE_COLUMNS if pd.isna(row.get(column))]
+
+    if not missing:
+        quality = "good"
+    elif len(missing) == len(MEASURE_COLUMNS):
+        quality = "critical"
+    elif "consumption_kwh" in missing:
+        quality = "degraded"
+    else:
+        quality = "partial"
+
+    reasons = [f"missing:{column}" for column in missing]
+
+    return quality, reasons
+
+
+def validate_source(
+    frame: pd.DataFrame,
+    metadata: dict[str, Any],
+) -> None:
+    """Valide le dataset avant tout chargement en base."""
+    missing_columns = REQUIRED_COLUMNS.difference(frame.columns)
+
+    if missing_columns:
+        raise ValueError(f"Colonnes obligatoires absentes : {sorted(missing_columns)}")
+
+    expected_records = int(metadata["total_records"])
+
+    if len(frame) != expected_records:
+        raise ValueError(f"Nombre de lignes inattendu : {len(frame)} au lieu de {expected_records}")
+
+    expected_sites = set(metadata["sites"].keys())
+    actual_sites = set(frame["site_id"].unique())
+
+    if actual_sites != expected_sites:
+        raise ValueError(
+            f"Sites incohérents. Attendus={sorted(expected_sites)}, trouvés={sorted(actual_sites)}"
+        )
+
+    duplicated = frame.duplicated(subset=["site_id", "timestamp"]).sum()
+
+    if duplicated:
+        raise ValueError(f"{duplicated} doublons (site_id, timestamp) détectés")
+
+    static_variants = frame.groupby("site_id")[["site_type", "site_name"]].nunique()
+
+    if (static_variants > 1).any().any():
+        raise ValueError("Un site possède plusieurs valeurs de site_type ou site_name.")
+
+    # Vérifie également que tous les timestamps
+    # peuvent être interprétés correctement.
+    pd.to_datetime(
+        frame["timestamp"],
+        errors="raise",
+    )
+
+
+def normalize_timestamps(
+    frame: pd.DataFrame,
+    source_timezone: str,
+) -> pd.DataFrame:
+    """
+    Normalise les timestamps et leur associe une timezone.
+
+    Les timestamps originaux sont conservés dans une colonne
+    temporaire afin de pouvoir les stocker dans raw_data.
+    """
+    normalized = frame.copy()
+
+    normalized["_source_timestamp"] = normalized["timestamp"]
+
+    timestamps = pd.to_datetime(
+        normalized["timestamp"],
+        errors="raise",
+    )
+
+    if timestamps.dt.tz is None:
+        timestamps = timestamps.dt.tz_localize(source_timezone)
+    else:
+        timestamps = timestamps.dt.tz_convert(source_timezone)
+
+    normalized["timestamp"] = timestamps
+
+    return normalized
+
+
+def to_json_value(value: Any) -> Any:
+    """
+    Convertit une valeur Pandas/Numpy en valeur
+    compatible JSON.
+    """
+    if value is None:
+        return None
+
+    try:
+        if pd.isna(value):
+            return None
+    except TypeError, ValueError:
+        pass
+
+    if isinstance(value, pd.Timestamp):
+        return value.isoformat()
+
+    if hasattr(value, "item"):
+        return value.item()
+
+    return value
+
+
+async def ensure_dataset(
+    connection: AsyncConnection,
+    metadata: dict[str, Any],
+    sha256: str,
+    source_timezone: str,
+    storage_uri: str,
+) -> int:
+    """
+    Crée l'entrée dataset si elle n'existe pas.
+
+    Le SHA-256 permet de reconnaître un fichier déjà importé
+    et participe à l'idempotence et à la traçabilité.
+    """
+    result = await connection.execute(
+        text(
+            """
+            SELECT dataset_id
+            FROM dataset
+            WHERE archive_sha256 = :sha256
+            LIMIT 1
+            """
+        ),
+        {
+            "sha256": sha256,
+        },
+    )
+
+    existing = result.scalar_one_or_none()
+
+    if existing is not None:
+        return int(existing)
+
+    metadata_summary = {
+        "generator_version": metadata.get("generator_version"),
+        "total_sites": metadata.get("total_sites"),
+        "total_records": metadata.get("total_records"),
+        "date_range": metadata.get("date_range"),
+        "frequency": metadata.get("frequency"),
+        "null_injection_enabled": metadata.get("null_injection_enabled"),
+        "null_strategies": metadata.get("null_strategies"),
+        "importer": "historical_import_v1",
+    }
+
+    result = await connection.execute(
+        text(
+            """
+            INSERT INTO dataset (
+                dataset_name,
+                archive_sha256,
+                storage_uri,
+                source_timezone,
+                "metadata"
+            )
+            VALUES (
+                :dataset_name,
+                :archive_sha256,
+                :storage_uri,
+                :source_timezone,
+                CAST(:metadata AS jsonb)
+            )
+            RETURNING dataset_id
+            """
+        ),
+        {
+            "dataset_name": ("EnerVision historical dataset 2023-2024"),
+            "archive_sha256": sha256,
+            "storage_uri": storage_uri,
+            "source_timezone": source_timezone,
+            "metadata": json.dumps(
+                metadata_summary,
+                ensure_ascii=False,
+            ),
+        },
+    )
+
+    return int(result.scalar_one())
+
+
+async def upsert_sites(
+    connection: AsyncConnection,
+    frame: pd.DataFrame,
+) -> None:
+    """Insère ou met à jour les sites du dataset."""
+    sites = cast(
+        list[dict[str, Any]],
+        frame[
+            [
+                "site_id",
+                "site_type",
+                "site_name",
+            ]
+        ]
+        .drop_duplicates(subset=["site_id"])
+        .to_dict(orient="records"),
+    )
+
+    await connection.execute(
+        text(
+            """
+            INSERT INTO site (
+                site_id,
+                site_type,
+                site_name
+            )
+            VALUES (
+                :site_id,
+                :site_type,
+                :site_name
+            )
+            ON CONFLICT (site_id)
+            DO UPDATE SET
+                site_type = EXCLUDED.site_type,
+                site_name = EXCLUDED.site_name
+            """
+        ),
+        sites,
+    )
+
+
+def build_reading_batch(
+    chunk: pd.DataFrame,
+    dataset_id: int,
+) -> list[dict[str, Any]]:
+    """
+    Transforme un chunk Pandas en lignes prêtes
+    à être chargées dans la table reading.
+    """
+    rows: list[dict[str, Any]] = []
+
+    records = cast(
+        list[dict[str, Any]],
+        chunk.to_dict(orient="records"),
+    )
+
+    for record in records:
+        quality, reasons = classify_quality(record)
+
+        raw_data = {
+            column: to_json_value(value)
+            for column, value in record.items()
+            if column != "_source_timestamp"
+        }
+
+        # Dans raw_data, on conserve le timestamp
+        # exactement tel qu'il était dans le CSV.
+        raw_data["timestamp"] = to_json_value(record["_source_timestamp"])
+
+        rows.append(
+            {
+                "site_id": record["site_id"],
+                "timestamp": record["timestamp"],
+                "source": SOURCE_NAME,
+                "dataset_id": dataset_id,
+                # Non fourni par le dataset historique.
+                "consumption_kw": None,
+                "consumption_kwh": to_json_value(record["consumption_kwh"]),
+                "consumption_euros": to_json_value(record["consumption_euros"]),
+                # Non fournis par le CSV historique.
+                "voltage_v": None,
+                "current_a": None,
+                "power_factor": None,
+                "temperature_celsius": (to_json_value(record["temperature_celsius"])),
+                "humidity_percent": (to_json_value(record["humidity_percent"])),
+                "solar_irradiance_wm2": (to_json_value(record["solar_irradiance_wm2"])),
+                "is_working_hours": bool(record["is_working_hours"]),
+                "data_quality": quality,
+                "null_reasons": reasons,
+                # Aucune imputation pendant l'ingestion RAW.
+                # Les valeurs manquantes sont conservées telles quelles
+                # afin de préserver la donnée source.
+                "imputed_values": None,
+                "imputation_method": None,
+                # Conservation de la donnée source
+                # pour la traçabilité.
+                "raw_data": json.dumps(
+                    raw_data,
+                    ensure_ascii=False,
+                ),
+            }
+        )
+
+    return rows
+
+
+READING_INSERT = text(
+    """
+    INSERT INTO reading (
+        site_id,
+        timestamp,
+        source,
+        dataset_id,
+        consumption_kw,
+        consumption_kwh,
+        consumption_euros,
+        voltage_v,
+        current_a,
+        power_factor,
+        temperature_celsius,
+        humidity_percent,
+        solar_irradiance_wm2,
+        is_working_hours,
+        data_quality,
+        null_reasons,
+        imputed_values,
+        imputation_method,
+        raw_data
+    )
+    VALUES (
+        :site_id,
+        :timestamp,
+        :source,
+        :dataset_id,
+        :consumption_kw,
+        :consumption_kwh,
+        :consumption_euros,
+        :voltage_v,
+        :current_a,
+        :power_factor,
+        :temperature_celsius,
+        :humidity_percent,
+        :solar_irradiance_wm2,
+        :is_working_hours,
+        :data_quality,
+        :null_reasons,
+        CAST(:imputed_values AS jsonb),
+        :imputation_method,
+        CAST(:raw_data AS jsonb)
+    )
+    ON CONFLICT DO NOTHING
+    """
+)
+
+
+async def import_historical(
+    csv_path: Path,
+    metadata_path: Path,
+    source_timezone: str,
+    batch_size: int,
+    dry_run: bool,
+    storage_uri: str,
+) -> None:
+    """
+    Exécute le pipeline ETL historique EnerVision.
+
+    Étapes :
+    1. Extract
+    2. Validate
+    3. Transform
+    4. Load
+    """
+    metadata = load_metadata(metadata_path)
+
+    frame = pd.read_csv(csv_path)
+
+    validate_source(
+        frame,
+        metadata,
+    )
+
+    print(f"Lignes             : {len(frame)}")
+    print(f"Sites              : {frame['site_id'].nunique()}")
+    print(f"Période            : {frame['timestamp'].min()} -> {frame['timestamp'].max()}")
+    print(f"Doublons           : {frame.duplicated(['site_id', 'timestamp']).sum()}")
+
+    print("\nValeurs NULL :")
+    print(frame[MEASURE_COLUMNS].isna().sum())
+
+    sha256 = compute_sha256(csv_path)
+
+    print(f"\nSHA-256            : {sha256}")
+
+    if dry_run:
+        print("\nDry-run terminé : aucune donnée écrite.")
+        return
+
+    normalized = normalize_timestamps(
+        frame,
+        source_timezone,
+    )
+
+    settings = get_settings()
+
+    engine = create_async_engine(
+        str(settings.database_url),
+        pool_pre_ping=True,
+    )
+
+    try:
+        async with engine.begin() as connection:
+            dataset_id = await ensure_dataset(
+                connection=connection,
+                metadata=metadata,
+                sha256=sha256,
+                source_timezone=source_timezone,
+                storage_uri=storage_uri,
+            )
+
+            await upsert_sites(
+                connection,
+                normalized,
+            )
+
+            result = await connection.execute(
+                text(
+                    """
+                    SELECT COUNT(*)
+                    FROM reading
+                    WHERE dataset_id = :dataset_id
+                      AND source = :source
+                    """
+                ),
+                {
+                    "dataset_id": dataset_id,
+                    "source": SOURCE_NAME,
+                },
+            )
+
+            before = int(result.scalar_one())
+
+            for start in range(
+                0,
+                len(normalized),
+                batch_size,
+            ):
+                chunk = normalized.iloc[start : start + batch_size]
+
+                rows = build_reading_batch(
+                    chunk,
+                    dataset_id,
+                )
+
+                await connection.execute(
+                    READING_INSERT,
+                    rows,
+                )
+
+                loaded = min(
+                    start + batch_size,
+                    len(normalized),
+                )
+
+                print(f"Chargement : {loaded}/{len(normalized)}")
+
+            result = await connection.execute(
+                text(
+                    """
+                    SELECT COUNT(*)
+                    FROM reading
+                    WHERE dataset_id = :dataset_id
+                      AND source = :source
+                    """
+                ),
+                {
+                    "dataset_id": dataset_id,
+                    "source": SOURCE_NAME,
+                },
+            )
+
+            after = int(result.scalar_one())
+
+            print("\nImport terminé.")
+            print(f"dataset_id         : {dataset_id}")
+            print(f"lectures avant     : {before}")
+            print(f"lectures après     : {after}")
+            print(f"nouvelles lectures : {after - before}")
+
+    finally:
+        await engine.dispose()
+
+
+def parse_args() -> argparse.Namespace:
+    """Définit les arguments CLI de l'import."""
+    parser = argparse.ArgumentParser(description=("Import historique EnerVision"))
+
+    parser.add_argument(
+        "--csv",
+        type=Path,
+        required=True,
+        help="Chemin vers le CSV historique.",
+    )
+
+    parser.add_argument(
+        "--metadata",
+        type=Path,
+        required=True,
+        help=("Chemin vers le fichier dataset_metadata.json."),
+    )
+
+    parser.add_argument(
+        "--source-timezone",
+        default="UTC",
+        help=("Timezone associée aux timestamps du dataset. Défaut : UTC."),
+    )
+
+    parser.add_argument(
+        "--batch-size",
+        type=int,
+        default=1000,
+        help=("Nombre de lignes insérées par batch. Défaut : 1000."),
+    )
+
+    parser.add_argument(
+        "--dry-run",
+        action="store_true",
+        help=("Valide les données sans écrire en base."),
+    )
+
+    return parser.parse_args()
+
+
+def main() -> None:
+    """Point d'entrée CLI du pipeline."""
+    args = parse_args()
+
+    if args.batch_size <= 0:
+        raise ValueError("--batch-size doit être strictement supérieur à 0.")
+
+    # resolve() est volontairement exécuté ici,
+    # dans la partie synchrone du programme.
+    # Cela évite une opération filesystem bloquante
+    # à l'intérieur d'une fonction async.
+    storage_uri = args.csv.resolve().as_uri()
+
+    asyncio.run(
+        import_historical(
+            csv_path=args.csv,
+            metadata_path=args.metadata,
+            source_timezone=(args.source_timezone),
+            batch_size=args.batch_size,
+            dry_run=args.dry_run,
+            storage_uri=storage_uri,
+        )
+    )
+
+
+if __name__ == "__main__":
+    main()

apps/backend/app/main.py

@@ -7,6 +7,7 @@ from prometheus_fastapi_instrumentator import Instrumentator
 
 from app.api.errors import register_error_handlers
 from app.api.middleware import SecurityHeadersMiddleware
+from app.api.openapi import DESCRIPTION, SUMMARY, TAGS
 from app.api.security import require_metrics_token
 from app.api.v1.router import api_router
 from app.core.config import Settings, get_settings
@@ -37,6 +38,9 @@ def create_app(settings: Settings | None = None) -> FastAPI:
     application = FastAPI(
         title=resolved.name,
         version=resolved.version,
+        summary=SUMMARY,
+        description=DESCRIPTION,
+        openapi_tags=TAGS,
         debug=resolved.debug,
         lifespan=lifespan,
         docs_url="/docs" if documentee else None,

apps/backend/app/models/__init__.py

@@ -2,8 +2,20 @@
 # --autogenerate`, qui générerait alors un drop de sa table.
 
 from app.models.audit_log import AuditLog
+from app.models.energy import Alert, Dataset, Prediction, Reading, Recommendation, Site
 from app.models.login_attempt import LoginAttempt
 from app.models.refresh_token import RefreshToken
 from app.models.user import AppUser
 
-__all__ = ["AppUser", "AuditLog", "LoginAttempt", "RefreshToken"]
+__all__ = [
+    "Alert",
+    "AppUser",
+    "AuditLog",
+    "Dataset",
+    "LoginAttempt",
+    "Prediction",
+    "Reading",
+    "Recommendation",
+    "RefreshToken",
+    "Site",
+]

apps/backend/app/models/energy.py

@@ -0,0 +1,210 @@
+"""Tables du modèle de données EnerVision (CSV, API Mock et résultats ML)."""
+
+from datetime import datetime
+from decimal import Decimal
+from typing import Any
+
+from sqlalchemy import (
+    BigInteger,
+    Boolean,
+    CheckConstraint,
+    DateTime,
+    Double,
+    ForeignKey,
+    ForeignKeyConstraint,
+    Index,
+    Integer,
+    Numeric,
+    String,
+    Text,
+    UniqueConstraint,
+    func,
+    text,
+)
+from sqlalchemy.dialects.postgresql import ARRAY, JSONB
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.db.base import Base
+
+
+class Dataset(Base):
+    __tablename__ = "dataset"
+    __table_args__ = (
+        CheckConstraint("dataset_id > 0", name="ck_dataset_positive_id"),
+        UniqueConstraint("archive_sha256", name="uq_dataset_archive_sha256"),
+    )
+
+    dataset_id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
+    dataset_name: Mapped[str] = mapped_column(Text)
+    archive_sha256: Mapped[str] = mapped_column(String(64))
+    storage_uri: Mapped[str] = mapped_column(Text)
+    source_timezone: Mapped[str | None] = mapped_column(Text)
+    # "metadata" est réservé par SQLAlchemy ; le nom SQL reste inchangé.
+    dataset_metadata: Mapped[dict[str, Any]] = mapped_column("metadata", JSONB(none_as_null=True))
+
+
+class Site(Base):
+    __tablename__ = "site"
+
+    site_id: Mapped[str] = mapped_column(Text, primary_key=True)
+    site_name: Mapped[str] = mapped_column(Text)
+    site_type: Mapped[str] = mapped_column(Text)
+    location: Mapped[str | None] = mapped_column(Text)
+    capacity_kw: Mapped[float | None] = mapped_column(Double)
+    status: Mapped[str | None] = mapped_column(Text)
+
+
+class Reading(Base):
+    __tablename__ = "reading"
+    __table_args__ = (
+        CheckConstraint(
+            "source IN ('csv', 'api_current', 'api_history')", name="ck_reading_source"
+        ),
+        CheckConstraint(
+            "(source = 'csv' AND dataset_id IS NOT NULL) OR "
+            "(source IN ('api_current', 'api_history') AND dataset_id IS NULL)",
+            name="ck_reading_dataset_source",
+        ),
+        CheckConstraint(
+            "data_quality IS NULL OR data_quality IN ('good', 'partial', 'degraded', 'critical')",
+            name="ck_reading_quality",
+        ),
+        CheckConstraint(
+            "(imputed_values IS NULL AND imputation_method IS NULL) OR "
+            "(imputed_values IS NOT NULL AND imputation_method IS NOT NULL)",
+            name="ck_reading_imputation",
+        ),
+        Index("ix_reading_site_timestamp", "site_id", "timestamp"),
+        Index("ix_reading_dataset_id", "dataset_id"),
+    )
+
+    reading_id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
+    site_id: Mapped[str] = mapped_column(
+        Text, ForeignKey("site.site_id", name="fk_reading_site", ondelete="RESTRICT")
+    )
+    timestamp: Mapped[datetime] = mapped_column(DateTime(timezone=True), primary_key=True)
+    source: Mapped[str] = mapped_column(Text)
+    dataset_id: Mapped[int | None] = mapped_column(
+        BigInteger,
+        ForeignKey("dataset.dataset_id", name="fk_reading_dataset", ondelete="RESTRICT"),
+    )
+    consumption_kw: Mapped[float | None] = mapped_column(Double)
+    consumption_kwh: Mapped[float | None] = mapped_column(Double)
+    consumption_euros: Mapped[Decimal | None] = mapped_column(Numeric(14, 2))
+    voltage_v: Mapped[float | None] = mapped_column(Double)
+    current_a: Mapped[float | None] = mapped_column(Double)
+    power_factor: Mapped[float | None] = mapped_column(Double)
+    temperature_celsius: Mapped[float | None] = mapped_column(Double)
+    humidity_percent: Mapped[float | None] = mapped_column(Double)
+    solar_irradiance_wm2: Mapped[float | None] = mapped_column(Double)
+    is_working_hours: Mapped[bool | None] = mapped_column(Boolean)
+    data_quality: Mapped[str | None] = mapped_column(Text)
+    null_reasons: Mapped[list[str] | None] = mapped_column(ARRAY(Text))
+    imputed_values: Mapped[dict[str, Any] | None] = mapped_column(JSONB(none_as_null=True))
+    imputation_method: Mapped[str | None] = mapped_column(Text)
+    ingested_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), server_default=func.now()
+    )
+    raw_data: Mapped[dict[str, Any]] = mapped_column(JSONB(none_as_null=True))
+
+
+Index(
+    "uq_reading_source",
+    Reading.site_id,
+    Reading.timestamp,
+    Reading.source,
+    func.coalesce(Reading.dataset_id, text("0")),
+    unique=True,
+)
+
+
+class Prediction(Base):
+    __tablename__ = "prediction"
+    __table_args__ = (
+        UniqueConstraint("prediction_id", "site_id", name="uq_prediction_id_site"),
+        Index("ix_prediction_site_target", "site_id", "target_at"),
+        CheckConstraint(
+            "target_metric IN ('consumption_kwh', 'consumption_kw')",
+            name="ck_prediction_metric",
+        ),
+        CheckConstraint(
+            "period_minutes IS NULL OR period_minutes > 0", name="ck_prediction_period"
+        ),
+        CheckConstraint(
+            "target_metric <> 'consumption_kwh' OR period_minutes IS NOT NULL",
+            name="ck_prediction_energy_period",
+        ),
+        CheckConstraint(
+            "(status = 'available' AND predicted_value IS NOT NULL AND failure_reason IS NULL) OR "
+            "(status IN ('insufficient_data', 'error') AND predicted_value IS NULL "
+            "AND failure_reason IS NOT NULL)",
+            name="ck_prediction_status",
+        ),
+    )
+
+    prediction_id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
+    site_id: Mapped[str] = mapped_column(
+        Text, ForeignKey("site.site_id", name="fk_prediction_site", ondelete="RESTRICT")
+    )
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+    target_at: Mapped[datetime] = mapped_column(DateTime(timezone=True))
+    target_metric: Mapped[str] = mapped_column(Text)
+    period_minutes: Mapped[int | None] = mapped_column(Integer)
+    predicted_value: Mapped[float | None] = mapped_column(Double)
+    model_reference: Mapped[str] = mapped_column(Text)
+    status: Mapped[str] = mapped_column(Text)
+    failure_reason: Mapped[str | None] = mapped_column(Text)
+
+
+class Alert(Base):
+    __tablename__ = "alert"
+    __table_args__ = (
+        UniqueConstraint("source", "site_id", "source_alert_id", name="uq_alert_source_reference"),
+        Index("ix_alert_site_timestamp", "site_id", "timestamp"),
+        ForeignKeyConstraint(
+            ["prediction_id", "site_id"],
+            ["prediction.prediction_id", "prediction.site_id"],
+            name="fk_alert_prediction_site",
+            ondelete="RESTRICT",
+        ),
+        CheckConstraint("source IN ('api_mock', 'enervision')", name="ck_alert_source"),
+        CheckConstraint(
+            "type IN ('spike', 'threshold', 'anomaly', 'outage', 'sensor')", name="ck_alert_type"
+        ),
+        CheckConstraint(
+            "severity IN ('low', 'medium', 'high', 'critical')", name="ck_alert_severity"
+        ),
+    )
+
+    alert_id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
+    source_alert_id: Mapped[str] = mapped_column(Text)
+    site_id: Mapped[str] = mapped_column(
+        Text, ForeignKey("site.site_id", name="fk_alert_site", ondelete="RESTRICT")
+    )
+    source: Mapped[str] = mapped_column(Text)
+    timestamp: Mapped[datetime] = mapped_column(DateTime(timezone=True))
+    type: Mapped[str] = mapped_column(Text)
+    severity: Mapped[str] = mapped_column(Text)
+    message: Mapped[str] = mapped_column(Text)
+    value: Mapped[float | None] = mapped_column(Double)
+    threshold: Mapped[float | None] = mapped_column(Double)
+    metric: Mapped[str | None] = mapped_column(Text)
+    prediction_id: Mapped[int | None] = mapped_column(BigInteger)
+    raw_data: Mapped[dict[str, Any]] = mapped_column(JSONB(none_as_null=True))
+
+
+class Recommendation(Base):
+    __tablename__ = "recommendation"
+    __table_args__ = (
+        UniqueConstraint("alert_id", "rule_reference", name="uq_recommendation_alert_rule"),
+    )
+
+    recommendation_id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
+    alert_id: Mapped[int] = mapped_column(
+        BigInteger,
+        ForeignKey("alert.alert_id", name="fk_recommendation_alert", ondelete="RESTRICT"),
+    )
+    action: Mapped[str] = mapped_column(Text)
+    explanation: Mapped[str] = mapped_column(Text)
+    rule_reference: Mapped[str] = mapped_column(Text)
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())

apps/backend/app/repositories/alert.py

@@ -0,0 +1,21 @@
+from collections.abc import Sequence
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.energy import Alert
+
+
+class AlertRepository:
+    def __init__(self, session: AsyncSession) -> None:
+        self._session = session
+
+    async def list_all(
+        self, *, site_id: str | None = None, severity: str | None = None
+    ) -> Sequence[Alert]:
+        requete = select(Alert).order_by(Alert.timestamp.desc(), Alert.alert_id.desc())
+        if site_id is not None:
+            requete = requete.where(Alert.site_id == site_id)
+        if severity is not None:
+            requete = requete.where(Alert.severity == severity)
+        return (await self._session.scalars(requete)).all()

apps/backend/app/repositories/reading.py

@@ -0,0 +1,55 @@
+from collections.abc import Sequence
+from datetime import datetime
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.energy import Reading
+
+
+class ReadingRepository:
+    def __init__(self, session: AsyncSession) -> None:
+        self._session = session
+
+    async def latest_by_site(self) -> Sequence[Reading]:
+        # `.distinct(site_id)` compile en `DISTINCT ON (site_id)` sous PostgreSQL : une seule
+        # ligne par site, la plus récente grâce à l'ordre composite qui suit. `reading_id` départage
+        # les égalités de timestamp, que `uq_reading_source` autorise à `source` différente.
+        requete = (
+            select(Reading)
+            .distinct(Reading.site_id)
+            .order_by(Reading.site_id, Reading.timestamp.desc(), Reading.reading_id.desc())
+        )
+        return (await self._session.execute(requete)).scalars().all()
+
+    async def latest_for_site(self, site_id: str) -> Reading | None:
+        # Piège : `uq_reading_source` autorise deux lignes au même `site_id`+`timestamp` quand la
+        # `source` diffère. Sans `reading_id` en départage, le `LIMIT 1` renverrait au hasard.
+        requete = (
+            select(Reading)
+            .where(Reading.site_id == site_id)
+            .order_by(Reading.timestamp.desc(), Reading.reading_id.desc())
+            .limit(1)
+        )
+        lecture: Reading | None = await self._session.scalar(requete)
+        return lecture
+
+    async def list_history(
+        self,
+        *,
+        start: datetime,
+        end: datetime,
+        site_id: str | None = None,
+        limit: int,
+        offset: int,
+    ) -> Sequence[Reading]:
+        requete = (
+            select(Reading)
+            .where(Reading.timestamp >= start, Reading.timestamp < end)
+            .order_by(Reading.timestamp.desc(), Reading.reading_id.desc())
+            .limit(limit)
+            .offset(offset)
+        )
+        if site_id is not None:
+            requete = requete.where(Reading.site_id == site_id)
+        return (await self._session.scalars(requete)).all()

apps/backend/app/repositories/recommendation.py

@@ -0,0 +1,22 @@
+from collections.abc import Sequence
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.energy import Recommendation
+
+
+class RecommendationRepository:
+    def __init__(self, session: AsyncSession) -> None:
+        self._session = session
+
+    async def list_all(self) -> Sequence[Recommendation]:
+        requete = select(Recommendation).order_by(Recommendation.recommendation_id)
+        return (await self._session.scalars(requete)).all()
+
+    async def get_by_id(self, recommendation_id: int) -> Recommendation | None:
+        requete = select(Recommendation).where(
+            Recommendation.recommendation_id == recommendation_id
+        )
+        recommendation: Recommendation | None = await self._session.scalar(requete)
+        return recommendation

apps/backend/app/repositories/site.py

@@ -0,0 +1,20 @@
+from collections.abc import Sequence
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.energy import Site
+
+
+class SiteRepository:
+    def __init__(self, session: AsyncSession) -> None:
+        self._session = session
+
+    async def list_all(self) -> Sequence[Site]:
+        requete = select(Site).order_by(Site.site_id)
+        return (await self._session.scalars(requete)).all()
+
+    async def get_by_id(self, site_id: str) -> Site | None:
+        requete = select(Site).where(Site.site_id == site_id)
+        site: Site | None = await self._session.scalar(requete)
+        return site

apps/backend/app/schemas/alert.py

@@ -0,0 +1,34 @@
+from datetime import datetime
+from enum import StrEnum
+
+from pydantic import BaseModel, ConfigDict
+
+
+class AlertType(StrEnum):
+    SPIKE = "spike"
+    THRESHOLD = "threshold"
+    ANOMALY = "anomaly"
+    OUTAGE = "outage"
+    SENSOR = "sensor"
+
+
+class AlertSeverity(StrEnum):
+    LOW = "low"
+    MEDIUM = "medium"
+    HIGH = "high"
+    CRITICAL = "critical"
+
+
+class AlertResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    alert_id: int
+    site_id: str
+    timestamp: datetime
+    type: AlertType
+    severity: AlertSeverity
+    message: str
+    value: float | None
+    threshold: float | None
+    metric: str | None
+    prediction_id: int | None

apps/backend/app/schemas/errors.py

@@ -0,0 +1,23 @@
+# Piège : ces modèles ne décrivent rien, ils publient. Ce sont eux que Swagger montre, donc ils
+# doivent suivre `validation_error_handler()` et `unhandled_error_handler()` d'`app/api/errors.py`
+# à la lettre. Un champ renommé là-bas sans l'être ici rend la documentation fausse en silence.
+
+from pydantic import BaseModel
+
+
+class ErrorResponse(BaseModel):
+    detail: str
+
+
+class FieldError(BaseModel):
+    champ: str
+    type: str
+
+
+class ValidationErrorResponse(BaseModel):
+    detail: list[FieldError]
+
+
+class InternalErrorResponse(BaseModel):
+    detail: str
+    correlation: str

apps/backend/app/schemas/reading.py

@@ -0,0 +1,45 @@
+from datetime import datetime
+from decimal import Decimal
+from enum import StrEnum
+from typing import Any
+
+from pydantic import BaseModel, ConfigDict
+
+
+class ReadingSource(StrEnum):
+    CSV = "csv"
+    API_CURRENT = "api_current"
+    API_HISTORY = "api_history"
+
+
+class ReadingDataQuality(StrEnum):
+    GOOD = "good"
+    PARTIAL = "partial"
+    DEGRADED = "degraded"
+    CRITICAL = "critical"
+
+
+class ReadingResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    reading_id: int
+    site_id: str
+    timestamp: datetime
+    source: ReadingSource
+    consumption_kw: float | None
+    consumption_kwh: float | None
+    # Piège : `Decimal` (miroir de `Numeric(14, 2)` en base, pour ne pas arrondir un montant)
+    # sérialise en chaîne dans le JSON, pas en nombre — un consommateur qui ferait un `parseFloat`
+    # naïf perdrait la précision que ce choix visait à garder.
+    consumption_euros: Decimal | None
+    voltage_v: float | None
+    current_a: float | None
+    power_factor: float | None
+    temperature_celsius: float | None
+    humidity_percent: float | None
+    solar_irradiance_wm2: float | None
+    is_working_hours: bool | None
+    data_quality: ReadingDataQuality | None
+    null_reasons: list[str] | None
+    imputed_values: dict[str, Any] | None
+    imputation_method: str | None

apps/backend/app/schemas/recommendation.py

@@ -0,0 +1,14 @@
+from datetime import datetime
+
+from pydantic import BaseModel, ConfigDict
+
+
+class RecommendationResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    recommendation_id: int
+    alert_id: int
+    action: str
+    explanation: str
+    rule_reference: str
+    created_at: datetime

apps/backend/app/schemas/sensor.py

@@ -0,0 +1,42 @@
+from datetime import datetime
+from typing import Literal
+
+from pydantic import BaseModel, ConfigDict, Field
+
+
+class SensorDiagnosticResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    status: Literal["ok", "failing"]
+    since: datetime | None = Field(
+        description=(
+            "Horodatage de la dernière lecture reçue pour ce site. Ce n'est pas le début de la "
+            "panne : l'historique ne permet pas de le dater sans requête supplémentaire."
+        )
+    )
+
+
+class SiteSensorsResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    consumption: SensorDiagnosticResponse
+    electrical: SensorDiagnosticResponse
+    temperature: SensorDiagnosticResponse
+    humidity: SensorDiagnosticResponse
+    network: SensorDiagnosticResponse
+
+
+class SiteSensorStatusResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    site_id: str
+    site_name: str
+    sensors: SiteSensorsResponse
+    overall: Literal["ok", "degraded", "critical"]
+
+
+class SensorStatusResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    timestamp: datetime
+    sites: list[SiteSensorStatusResponse]

apps/backend/app/schemas/site.py

@@ -0,0 +1,32 @@
+from datetime import datetime
+from typing import Literal
+
+from pydantic import BaseModel, ConfigDict
+
+
+class SiteResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    site_id: str
+    site_name: str
+    site_type: str
+    location: str | None
+    capacity_kw: float | None
+    status: str | None
+
+
+class SiteCurrentResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    timestamp: datetime | None
+    site_id: str
+    site_type: str
+    consumption_kw: float | None
+    consumption_kwh: float | None
+    voltage_v: float | None
+    current_a: float | None
+    power_factor: float | None
+    temperature_celsius: float | None
+    humidity_percent: float | None
+    null_reasons: list[str]
+    data_quality: Literal["good", "partial", "degraded", "critical"]

apps/backend/app/schemas/stats.py

@@ -0,0 +1,26 @@
+from datetime import datetime
+from typing import Literal
+
+from pydantic import BaseModel, ConfigDict
+
+
+class SiteSummaryResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    site_id: str
+    site_name: str
+    current_consumption_kw: float | None
+    capacity_kw: float
+    load_percent: float | None
+    data_quality: Literal["good", "partial", "degraded", "critical"]
+
+
+class StatsSummaryResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    timestamp: datetime
+    total_sites: int
+    total_consumption_kw: float
+    total_capacity_kw: float
+    average_load_percent: float
+    sites: list[SiteSummaryResponse]

apps/backend/app/services/alert.py

@@ -0,0 +1,14 @@
+from collections.abc import Sequence
+
+from app.models.energy import Alert
+from app.repositories.alert import AlertRepository
+
+
+class AlertService:
+    def __init__(self, *, alerts: AlertRepository) -> None:
+        self._alerts = alerts
+
+    async def list_all(
+        self, *, site_id: str | None = None, severity: str | None = None
+    ) -> Sequence[Alert]:
+        return await self._alerts.list_all(site_id=site_id, severity=severity)

apps/backend/app/services/data_quality.py

@@ -0,0 +1,18 @@
+# Contrainte : `ck_reading_quality` accepte NULL et quatre valeurs seulement, alors que le contrat
+# frontend n'a aucune valeur pour l'absence de qualité. `qualite_ou_critique()` replie donc sur
+# `critical`, la seule des quatre qui n'induise pas une confiance qu'on n'a pas. `QUALITES_CONNUES`
+# reste exposé pour les appelants qui doivent distinguer un `critical` stocké d'un repli.
+
+from typing import Literal, get_args
+
+DataQuality = Literal["good", "partial", "degraded", "critical"]
+
+QUALITES_CONNUES: frozenset[str] = frozenset(get_args(DataQuality))
+
+_PAR_VALEUR: dict[str, DataQuality] = {valeur: valeur for valeur in get_args(DataQuality)}
+
+
+def qualite_ou_critique(valeur: str | None) -> DataQuality:
+    if valeur is None:
+        return "critical"
+    return _PAR_VALEUR.get(valeur, "critical")

apps/backend/app/services/reading.py

@@ -0,0 +1,59 @@
+from collections.abc import Sequence
+from datetime import UTC, datetime, timedelta
+
+from app.models.energy import Reading
+from app.repositories.reading import ReadingRepository
+
+FENETRE_PAR_DEFAUT = timedelta(hours=24)
+FENETRE_MAXIMALE = timedelta(days=90)
+
+
+class FenetreInverseeError(Exception):
+    """`start` est postérieur ou égal à `end`."""
+
+
+class FenetreTropLargeError(Exception):
+    """L'écart entre `start` et `end` dépasse `FENETRE_MAXIMALE`."""
+
+
+class ReadingService:
+    def __init__(self, *, readings: ReadingRepository) -> None:
+        self._readings = readings
+
+    async def list_history(
+        self,
+        *,
+        site_id: str | None = None,
+        start: datetime | None = None,
+        end: datetime | None = None,
+        limit: int,
+        offset: int,
+    ) -> Sequence[Reading]:
+        debut, fin = self._resoudre_fenetre(start, end)
+        return await self._readings.list_history(
+            site_id=site_id, start=debut, end=fin, limit=limit, offset=offset
+        )
+
+    @staticmethod
+    def _resoudre_fenetre(
+        start: datetime | None, end: datetime | None
+    ) -> tuple[datetime, datetime]:
+        # Piège : un datetime naïf (sans fuseau dans la chaîne ISO reçue) fait échouer la
+        # comparaison à `reading.timestamp` (`timestamptz`) au niveau du pilote, en 500 plutôt
+        # qu'un refus propre. On le traite comme de l'UTC plutôt que de le rejeter.
+        debut = _vers_utc(start)
+        fin = _vers_utc(end) or datetime.now(UTC)
+        if debut is None:
+            debut = fin - FENETRE_PAR_DEFAUT
+
+        if debut >= fin:
+            raise FenetreInverseeError
+        if fin - debut > FENETRE_MAXIMALE:
+            raise FenetreTropLargeError
+        return debut, fin
+
+
+def _vers_utc(instant: datetime | None) -> datetime | None:
+    if instant is None:
+        return None
+    return instant if instant.tzinfo is not None else instant.replace(tzinfo=UTC)

apps/backend/app/services/recommendation.py

@@ -0,0 +1,26 @@
+from collections.abc import Sequence
+
+from app.models.energy import Recommendation
+from app.repositories.recommendation import RecommendationRepository
+
+
+class RecommendationError(Exception):
+    pass
+
+
+class RecommendationNotFoundError(RecommendationError):
+    pass
+
+
+class RecommendationService:
+    def __init__(self, *, recommendations: RecommendationRepository) -> None:
+        self._recommendations = recommendations
+
+    async def list_all(self) -> Sequence[Recommendation]:
+        return await self._recommendations.list_all()
+
+    async def get_by_id(self, recommendation_id: int) -> Recommendation:
+        recommendation = await self._recommendations.get_by_id(recommendation_id)
+        if recommendation is None:
+            raise RecommendationNotFoundError(recommendation_id)
+        return recommendation

apps/backend/app/services/sensor.py

@@ -0,0 +1,136 @@
+from dataclasses import dataclass
+from datetime import UTC, datetime
+from typing import Literal
+
+from app.models.energy import Reading, Site
+from app.repositories.reading import ReadingRepository
+from app.repositories.site import SiteRepository
+from app.services.data_quality import qualite_ou_critique
+
+CapteurStatus = Literal["ok", "failing"]
+OverallStatus = Literal["ok", "degraded", "critical"]
+
+RAISON_VERS_CAPTEUR: dict[str, str] = {
+    "consumption_sensor_failure": "consumption",
+    "electrical_sensor_failure": "electrical",
+    "temperature_sensor_failure": "temperature",
+    "humidity_sensor_failure": "humidity",
+    "network_loss": "network",
+}
+
+CHAMPS_PAR_CAPTEUR: dict[str, tuple[str, ...]] = {
+    "consumption": ("consumption_kw",),
+    "electrical": ("voltage_v", "current_a", "power_factor"),
+    "temperature": ("temperature_celsius",),
+    "humidity": ("humidity_percent",),
+}
+
+
+@dataclass(frozen=True, slots=True)
+class DiagnosticCapteur:
+    status: CapteurStatus
+    since: datetime | None
+
+
+@dataclass(frozen=True, slots=True)
+class SanteCapteurs:
+    consumption: DiagnosticCapteur
+    electrical: DiagnosticCapteur
+    temperature: DiagnosticCapteur
+    humidity: DiagnosticCapteur
+    network: DiagnosticCapteur
+
+
+@dataclass(frozen=True, slots=True)
+class SanteSite:
+    site_id: str
+    site_name: str
+    sensors: SanteCapteurs
+    overall: OverallStatus
+
+
+@dataclass(frozen=True, slots=True)
+class EtatCapteurs:
+    timestamp: datetime
+    sites: list[SanteSite]
+
+
+class SensorService:
+    def __init__(self, sites: SiteRepository, readings: ReadingRepository) -> None:
+        self._sites = sites
+        self._readings = readings
+
+    async def status(self) -> EtatCapteurs:
+        sites = await self._sites.list_all()
+        dernieres = {lecture.site_id: lecture for lecture in await self._readings.latest_by_site()}
+
+        return EtatCapteurs(
+            timestamp=datetime.now(UTC),
+            sites=[_sante_site(site, dernieres.get(site.site_id)) for site in sites],
+        )
+
+
+def _sante_site(site: Site, derniere: Reading | None) -> SanteSite:
+    if derniere is None:
+        return SanteSite(
+            site_id=site.site_id,
+            site_name=site.site_name,
+            sensors=_tout_en_echec(since=None),
+            overall="critical",
+        )
+
+    qualite = qualite_ou_critique(derniere.data_quality)
+    overall = _overall_depuis_qualite(qualite)
+
+    if overall == "critical":
+        return SanteSite(
+            site_id=site.site_id,
+            site_name=site.site_name,
+            sensors=_tout_en_echec(since=derniere.timestamp),
+            overall="critical",
+        )
+
+    raisons_signalees = {
+        RAISON_VERS_CAPTEUR[raison]
+        for raison in (derniere.null_reasons or [])
+        if raison in RAISON_VERS_CAPTEUR
+    }
+
+    return SanteSite(
+        site_id=site.site_id,
+        site_name=site.site_name,
+        sensors=SanteCapteurs(
+            consumption=_diagnostic("consumption", derniere, raisons_signalees),
+            electrical=_diagnostic("electrical", derniere, raisons_signalees),
+            temperature=_diagnostic("temperature", derniere, raisons_signalees),
+            humidity=_diagnostic("humidity", derniere, raisons_signalees),
+            network=_diagnostic("network", derniere, raisons_signalees),
+        ),
+        overall=overall,
+    )
+
+
+def _overall_depuis_qualite(qualite: str) -> OverallStatus:
+    if qualite == "good":
+        return "ok"
+    if qualite in ("partial", "degraded"):
+        return "degraded"
+    return "critical"
+
+
+def _diagnostic(capteur: str, derniere: Reading, raisons_signalees: set[str]) -> DiagnosticCapteur:
+    champs = CHAMPS_PAR_CAPTEUR.get(capteur, ())
+    en_echec = capteur in raisons_signalees or any(
+        getattr(derniere, champ) is None for champ in champs
+    )
+    return DiagnosticCapteur(
+        status="failing" if en_echec else "ok",
+        since=derniere.timestamp if en_echec else None,
+    )
+
+
+def _tout_en_echec(since: datetime | None) -> SanteCapteurs:
+    echec = DiagnosticCapteur(status="failing", since=since)
+    return SanteCapteurs(
+        consumption=echec, electrical=echec, temperature=echec, humidity=echec, network=echec
+    )

apps/backend/app/services/site.py

@@ -0,0 +1,82 @@
+from collections.abc import Sequence
+from dataclasses import dataclass
+from datetime import datetime
+
+from app.models.energy import Site
+from app.repositories.reading import ReadingRepository
+from app.repositories.site import SiteRepository
+from app.services.data_quality import DataQuality, qualite_ou_critique
+
+
+class SiteError(Exception):
+    pass
+
+
+class SiteNotFoundError(SiteError):
+    pass
+
+
+@dataclass(frozen=True, slots=True)
+class SiteCurrentReading:
+    timestamp: datetime | None
+    site_id: str
+    site_type: str
+    consumption_kw: float | None
+    consumption_kwh: float | None
+    voltage_v: float | None
+    current_a: float | None
+    power_factor: float | None
+    temperature_celsius: float | None
+    humidity_percent: float | None
+    null_reasons: list[str]
+    data_quality: DataQuality
+
+
+class SiteService:
+    def __init__(self, *, sites: SiteRepository, readings: ReadingRepository) -> None:
+        self._sites = sites
+        self._readings = readings
+
+    async def list_all(self) -> Sequence[Site]:
+        return await self._sites.list_all()
+
+    async def get_by_id(self, site_id: str) -> Site:
+        site = await self._sites.get_by_id(site_id)
+        if site is None:
+            raise SiteNotFoundError(site_id)
+        return site
+
+    async def current(self, site_id: str) -> SiteCurrentReading:
+        site = await self.get_by_id(site_id)
+        derniere = await self._readings.latest_for_site(site_id)
+
+        if derniere is None:
+            return SiteCurrentReading(
+                timestamp=None,
+                site_id=site.site_id,
+                site_type=site.site_type,
+                consumption_kw=None,
+                consumption_kwh=None,
+                voltage_v=None,
+                current_a=None,
+                power_factor=None,
+                temperature_celsius=None,
+                humidity_percent=None,
+                null_reasons=[],
+                data_quality="critical",
+            )
+
+        return SiteCurrentReading(
+            timestamp=derniere.timestamp,
+            site_id=site.site_id,
+            site_type=site.site_type,
+            consumption_kw=derniere.consumption_kw,
+            consumption_kwh=derniere.consumption_kwh,
+            voltage_v=derniere.voltage_v,
+            current_a=derniere.current_a,
+            power_factor=derniere.power_factor,
+            temperature_celsius=derniere.temperature_celsius,
+            humidity_percent=derniere.humidity_percent,
+            null_reasons=derniere.null_reasons or [],
+            data_quality=qualite_ou_critique(derniere.data_quality),
+        )

apps/backend/app/services/stats.py

@@ -0,0 +1,74 @@
+from dataclasses import dataclass
+from datetime import UTC, datetime
+
+from app.models.energy import Reading, Site
+from app.repositories.reading import ReadingRepository
+from app.repositories.site import SiteRepository
+from app.services.data_quality import QUALITES_CONNUES, DataQuality, qualite_ou_critique
+
+
+@dataclass(frozen=True, slots=True)
+class SiteConsumption:
+    site_id: str
+    site_name: str
+    current_consumption_kw: float | None
+    capacity_kw: float
+    load_percent: float | None
+    data_quality: DataQuality
+
+
+@dataclass(frozen=True, slots=True)
+class ConsumptionSummary:
+    timestamp: datetime
+    total_sites: int
+    total_consumption_kw: float
+    total_capacity_kw: float
+    average_load_percent: float
+    sites: list[SiteConsumption]
+
+
+class StatsService:
+    def __init__(self, sites: SiteRepository, readings: ReadingRepository) -> None:
+        self._sites = sites
+        self._readings = readings
+
+    async def summary(self) -> ConsumptionSummary:
+        sites = await self._sites.list_all()
+        dernieres = {lecture.site_id: lecture for lecture in await self._readings.latest_by_site()}
+
+        resumes = [self._resume_site(site, dernieres.get(site.site_id)) for site in sites]
+        consommation_totale = sum(r.current_consumption_kw or 0 for r in resumes)
+        capacite_totale = sum(r.capacity_kw for r in resumes)
+
+        return ConsumptionSummary(
+            timestamp=datetime.now(UTC),
+            total_sites=len(resumes),
+            total_consumption_kw=consommation_totale,
+            total_capacity_kw=capacite_totale,
+            average_load_percent=(
+                consommation_totale / capacite_totale * 100 if capacite_totale > 0 else 0
+            ),
+            sites=resumes,
+        )
+
+    @staticmethod
+    def _resume_site(site: Site, derniere: Reading | None) -> SiteConsumption:
+        capacite = site.capacity_kw or 0
+        qualite: DataQuality = "critical"
+        consommation = None
+        if derniere is not None and derniere.data_quality in QUALITES_CONNUES:
+            qualite = qualite_ou_critique(derniere.data_quality)
+            consommation = derniere.consumption_kw
+
+        charge = (
+            consommation / capacite * 100 if consommation is not None and capacite > 0 else None
+        )
+
+        return SiteConsumption(
+            site_id=site.site_id,
+            site_name=site.site_name,
+            current_consumption_kw=consommation,
+            capacity_kw=capacite,
+            load_percent=charge,
+            data_quality=qualite,
+        )

apps/backend/pyproject.toml

@@ -16,6 +16,7 @@ dependencies = [
     "pyjwt>=2.10",
     "argon2-cffi>=23.1",
     "anyio>=4.0",
+    "pandas>=3.0.5",
 ]
 
 [dependency-groups]
@@ -26,6 +27,7 @@ dev = [
     "pytest-asyncio>=1.4.0",
     "pytest-cov>=7.1.0",
     "httpx>=0.28.1",
+    "pandas-stubs>=3.0.5.260914",
 ]
 
 [build-system]

apps/backend/tests/api/test_alerts.py

@@ -0,0 +1,137 @@
+from collections.abc import Callable, Iterator
+from datetime import UTC, datetime
+from uuid import uuid4
+
+import pytest
+from fastapi import FastAPI
+from httpx import AsyncClient
+
+from app.api.deps import get_alert_service, get_current_principal
+from app.core.principal import Principal
+from app.core.roles import AccountKind, Role
+from app.models.energy import Alert
+from app.schemas.alert import AlertSeverity
+
+
+def principal(role: Role = Role.LECTEUR) -> Principal:
+    return Principal(
+        id=uuid4(),
+        email=f"{role.value}@enervision.fr",
+        role=role,
+        kind=AccountKind.HUMAIN,
+        must_change_password=False,
+    )
+
+
+def alert(alert_id: int = 1, site_id: str = "site-1", severity: str = "high") -> Alert:
+    return Alert(
+        alert_id=alert_id,
+        source_alert_id=f"ALR-{alert_id}",
+        site_id=site_id,
+        source="enervision",
+        timestamp=datetime(2026, 9, 16, tzinfo=UTC),
+        type="threshold",
+        severity=severity,
+        message="Dépassement du seuil configuré",
+        value=812.5,
+        threshold=720.0,
+        metric="consumption_kw",
+        prediction_id=None,
+        raw_data={},
+    )
+
+
+class FauxService:
+    def __init__(self) -> None:
+        self.alert = alert()
+        self.appels: list[tuple[str | None, str | None]] = []
+
+    async def list_all(
+        self, *, site_id: str | None = None, severity: str | None = None
+    ) -> list[Alert]:
+        self.appels.append((site_id, severity))
+        return [self.alert]
+
+
+@pytest.fixture
+def lecteur_connecte(app: FastAPI) -> Iterator[None]:
+    app.dependency_overrides[get_current_principal] = lambda: principal()
+    yield
+    app.dependency_overrides.pop(get_current_principal, None)
+
+
+@pytest.fixture
+def servi(app: FastAPI, lecteur_connecte: None) -> Iterator[Callable[[], FauxService]]:
+    def installe() -> FauxService:
+        service = FauxService()
+        app.dependency_overrides[get_alert_service] = lambda: service
+        return service
+
+    yield installe
+    app.dependency_overrides.pop(get_alert_service, None)
+
+
+async def test_list_alerts_returns_the_alerts(
+    servi: Callable[[], FauxService], client: AsyncClient
+) -> None:
+    servi()
+
+    response = await client.get("/api/v1/alerts")
+
+    assert response.status_code == 200
+    corps = response.json()
+    assert corps == [
+        {
+            "alert_id": 1,
+            "site_id": "site-1",
+            "timestamp": "2026-09-16T00:00:00Z",
+            "type": "threshold",
+            "severity": "high",
+            "message": "Dépassement du seuil configuré",
+            "value": 812.5,
+            "threshold": 720.0,
+            "metric": "consumption_kw",
+            "prediction_id": None,
+        }
+    ]
+
+
+async def test_list_alerts_transmits_the_site_id_filter(
+    servi: Callable[[], FauxService], client: AsyncClient
+) -> None:
+    service = servi()
+
+    await client.get("/api/v1/alerts?site_id=site-1")
+
+    assert service.appels == [("site-1", None)]
+
+
+async def test_list_alerts_transmits_the_severity_filter(
+    servi: Callable[[], FauxService], client: AsyncClient
+) -> None:
+    service = servi()
+
+    await client.get("/api/v1/alerts?severity=critical")
+
+    assert service.appels == [(None, AlertSeverity.CRITICAL)]
+
+
+async def test_list_alerts_returns_422_for_an_unknown_severity(
+    servi: Callable[[], FauxService], client: AsyncClient
+) -> None:
+    servi()
+
+    response = await client.get("/api/v1/alerts?severity=invalide")
+
+    assert response.status_code == 422
+
+
+async def test_list_alerts_returns_an_empty_list_when_there_is_nothing(
+    lecteur_connecte: None, fake_session: Callable[..., None], client: AsyncClient
+) -> None:
+    fake_session(result=[])
+
+    response = await client.get("/api/v1/alerts")
+
+    assert response.status_code == 200
+    assert response.json() == []

apps/backend/tests/api/test_openapi.py

@@ -0,0 +1,126 @@
+# Pourquoi : `openapi.json` est versionné, donc une route qui change son contrat public le montre
+# dans la diff d'une pull request. `test_the_committed_contract_matches_the_generated_one` est ce
+# qui empêche le fichier de dériver du code sans que personne ne le voie.
+
+import json
+from typing import Any
+
+import pytest
+
+from app import cli
+
+METHODES = {"get", "post", "patch", "put", "delete"}
+
+# `/auth/logout` lit le cookie mais ne le réclame pas : sans session elle répond 204, et un 401
+# documenté y serait faux.
+SANS_REFUS = {("POST", "/api/v1/auth/logout")}
+
+ORIGINE_VERIFIEE = {
+    ("POST", "/api/v1/auth/refresh"),
+    ("POST", "/api/v1/auth/logout"),
+    ("POST", "/api/v1/auth/logout-all"),
+    ("POST", "/api/v1/auth/password"),
+}
+
+# Toute route derrière `require_role` (LecteurDep, OperateurDep, AdminDep) peut rendre 403 pour
+# `password_change_required`, pas seulement les routes `admin`.
+ROUTES_A_ROLE = {
+    ("GET", "/api/v1/users"),
+    ("POST", "/api/v1/users"),
+    ("PATCH", "/api/v1/users/{id}"),
+    ("POST", "/api/v1/users/{id}/password-reset"),
+    ("GET", "/api/v1/sites"),
+    ("GET", "/api/v1/sites/{site_id}"),
+    ("GET", "/api/v1/sites/{site_id}/current"),
+    ("GET", "/api/v1/alerts"),
+    ("GET", "/api/v1/recommendations"),
+    ("GET", "/api/v1/recommendations/{recommendation_id}"),
+    ("GET", "/api/v1/stats/summary"),
+    ("GET", "/api/v1/readings"),
+    ("GET", "/api/v1/sensors/status"),
+}
+
+
+@pytest.fixture(scope="module")
+def schema() -> dict[str, Any]:
+    return cli.schema_du_contrat()
+
+
+def operations(schema: dict[str, Any]) -> list[tuple[str, str, dict[str, Any]]]:
+    return [
+        (methode.upper(), chemin, operation)
+        for chemin, operations_du_chemin in schema["paths"].items()
+        for methode, operation in operations_du_chemin.items()
+        if methode in METHODES
+    ]
+
+
+def test_the_committed_contract_matches_the_generated_one(schema: dict[str, Any]) -> None:
+    publie = json.loads(cli.CHEMIN_CONTRAT.read_text(encoding="utf-8"))
+
+    assert publie == schema, "lancer `make openapi` et versionner le fichier obtenu"
+
+
+def test_every_route_demanding_an_identity_says_how_it_refuses(schema: dict[str, Any]) -> None:
+    muettes = [
+        (methode, chemin)
+        for methode, chemin, operation in operations(schema)
+        if operation.get("security")
+        and (methode, chemin) not in SANS_REFUS
+        and "401" not in operation["responses"]
+    ]
+
+    assert muettes == []
+
+
+def test_every_role_guarded_route_documents_the_role_refusal(schema: dict[str, Any]) -> None:
+    sans_403 = [
+        (methode, chemin)
+        for methode, chemin, operation in operations(schema)
+        if (methode, chemin) in ROUTES_A_ROLE and "403" not in operation["responses"]
+    ]
+
+    assert sans_403 == []
+
+
+def test_every_origin_checked_route_documents_the_csrf_refusal(schema: dict[str, Any]) -> None:
+    sans_403 = [
+        (methode, chemin)
+        for methode, chemin, operation in operations(schema)
+        if (methode, chemin) in ORIGINE_VERIFIEE and "403" not in operation["responses"]
+    ]
+
+    assert sans_403 == []
+
+
+def test_the_validation_model_matches_what_the_handler_returns(schema: dict[str, Any]) -> None:
+    modeles = {
+        operation["responses"]["422"]["content"]["application/json"]["schema"]["$ref"]
+        for _, _, operation in operations(schema)
+        if "422" in operation["responses"]
+    }
+
+    assert modeles == {"#/components/schemas/ValidationErrorResponse"}
+    assert "HTTPValidationError" not in schema["components"]["schemas"]
+
+
+def test_the_rate_limit_documents_the_delay_header(schema: dict[str, Any]) -> None:
+    trop_de_tentatives = schema["paths"]["/api/v1/auth/login"]["post"]["responses"]["429"]
+
+    assert "Retry-After" in trop_de_tentatives["headers"]
+
+
+def test_the_refresh_cookie_appears_in_the_security_schemes(schema: dict[str, Any]) -> None:
+    schemes = schema["components"]["securitySchemes"]
+
+    assert schemes["Cookie de rafraîchissement"]["in"] == "cookie"
+    assert schemes["Cookie de rafraîchissement"]["name"] == "ev_refresh"
+
+
+def test_each_tag_used_by_a_route_is_described(schema: dict[str, Any]) -> None:
+    decrits = {tag["name"] for tag in schema["tags"]}
+
+    for methode, chemin, operation in operations(schema):
+        poses = operation.get("tags", [])
+        assert len(poses) == len(set(poses)), f"tag en double sur {methode} {chemin}"
+        assert set(poses) <= decrits, f"tag non décrit sur {methode} {chemin}"

apps/backend/tests/api/test_readings.py

@@ -0,0 +1,198 @@
+from collections.abc import Callable, Iterator
+from datetime import UTC, datetime
+from uuid import uuid4
+
+import pytest
+from fastapi import FastAPI
+from httpx import AsyncClient
+
+from app.api.deps import get_current_principal, get_reading_service
+from app.core.principal import Principal
+from app.core.roles import AccountKind, Role
+from app.models.energy import Reading
+from app.services.reading import FenetreInverseeError, FenetreTropLargeError
+
+
+def principal(role: Role = Role.LECTEUR) -> Principal:
+    return Principal(
+        id=uuid4(),
+        email=f"{role.value}@enervision.fr",
+        role=role,
+        kind=AccountKind.HUMAIN,
+        must_change_password=False,
+    )
+
+
+def reading(reading_id: int = 1, site_id: str = "site-1") -> Reading:
+    return Reading(
+        reading_id=reading_id,
+        site_id=site_id,
+        timestamp=datetime(2026, 9, 16, tzinfo=UTC),
+        source="api_current",
+        consumption_kw=42.5,
+        consumption_kwh=None,
+        consumption_euros=None,
+        voltage_v=230.0,
+        current_a=None,
+        power_factor=None,
+        temperature_celsius=None,
+        humidity_percent=None,
+        solar_irradiance_wm2=None,
+        is_working_hours=True,
+        data_quality="good",
+        null_reasons=None,
+        imputed_values=None,
+        imputation_method=None,
+        raw_data={},
+    )
+
+
+class FauxService:
+    def __init__(self, leve: Exception | None = None) -> None:
+        self.reading = reading()
+        self.leve = leve
+        self.appels: list[tuple[str | None, str | None, str | None, int, int]] = []
+
+    async def list_history(
+        self,
+        *,
+        site_id: str | None = None,
+        start: datetime | None = None,
+        end: datetime | None = None,
+        limit: int,
+        offset: int,
+    ) -> list[Reading]:
+        self.appels.append((site_id, start, end, limit, offset))
+        if self.leve is not None:
+            raise self.leve
+        return [self.reading]
+
+
+@pytest.fixture
+def lecteur_connecte(app: FastAPI) -> Iterator[None]:
+    app.dependency_overrides[get_current_principal] = lambda: principal()
+    yield
+    app.dependency_overrides.pop(get_current_principal, None)
+
+
+@pytest.fixture
+def servi(app: FastAPI, lecteur_connecte: None) -> Iterator[Callable[..., FauxService]]:
+    def installe(*, leve: Exception | None = None) -> FauxService:
+        service = FauxService(leve=leve)
+        app.dependency_overrides[get_reading_service] = lambda: service
+        return service
+
+    yield installe
+    app.dependency_overrides.pop(get_reading_service, None)
+
+
+async def test_list_readings_returns_the_readings(
+    servi: Callable[..., FauxService], client: AsyncClient
+) -> None:
+    servi()
+
+    response = await client.get("/api/v1/readings")
+
+    assert response.status_code == 200
+    corps = response.json()
+    assert corps == [
+        {
+            "reading_id": 1,
+            "site_id": "site-1",
+            "timestamp": "2026-09-16T00:00:00Z",
+            "source": "api_current",
+            "consumption_kw": 42.5,
+            "consumption_kwh": None,
+            "consumption_euros": None,
+            "voltage_v": 230.0,
+            "current_a": None,
+            "power_factor": None,
+            "temperature_celsius": None,
+            "humidity_percent": None,
+            "solar_irradiance_wm2": None,
+            "is_working_hours": True,
+            "data_quality": "good",
+            "null_reasons": None,
+            "imputed_values": None,
+            "imputation_method": None,
+        }
+    ]
+
+
+async def test_list_readings_transmits_the_filters_and_pagination(
+    servi: Callable[..., FauxService], client: AsyncClient
+) -> None:
+    service = servi()
+
+    response = await client.get(
+        "/api/v1/readings",
+        params={
+            "site_id": "site-1",
+            "start": "2026-09-01T00:00:00Z",
+            "end": "2026-09-02T00:00:00Z",
+            "limit": 50,
+            "offset": 10,
+        },
+    )
+
+    assert response.status_code == 200
+    assert service.appels == [
+        (
+            "site-1",
+            datetime(2026, 9, 1, tzinfo=UTC),
+            datetime(2026, 9, 2, tzinfo=UTC),
+            50,
+            10,
+        )
+    ]
+
+
+async def test_list_readings_returns_400_when_the_window_is_inverted(
+    servi: Callable[..., FauxService], client: AsyncClient
+) -> None:
+    servi(leve=FenetreInverseeError())
+
+    response = await client.get("/api/v1/readings")
+
+    assert response.status_code == 400
+
+
+async def test_list_readings_returns_400_when_the_window_is_too_large(
+    servi: Callable[..., FauxService], client: AsyncClient
+) -> None:
+    servi(leve=FenetreTropLargeError())
+
+    response = await client.get("/api/v1/readings")
+
+    assert response.status_code == 400
+
+
+async def test_list_readings_returns_422_for_a_limit_above_the_maximum(
+    servi: Callable[..., FauxService], client: AsyncClient
+) -> None:
+    servi()
+
+    response = await client.get("/api/v1/readings", params={"limit": 5000})
+
+    assert response.status_code == 422
+
+
+async def test_list_readings_returns_422_for_a_negative_offset(
+    servi: Callable[..., FauxService], client: AsyncClient
+) -> None:
+    servi()
+
+    response = await client.get("/api/v1/readings", params={"offset": -1})
+
+    assert response.status_code == 422
+
+
+async def test_list_readings_returns_an_empty_list_when_there_is_nothing(
+    lecteur_connecte: None, fake_session: Callable[..., None], client: AsyncClient
+) -> None:
+    fake_session(result=[])
+
+    response = await client.get("/api/v1/readings")
+
+    assert response.status_code == 200
+    assert response.json() == []

apps/backend/tests/api/test_recommendations.py

@@ -0,0 +1,144 @@
+from collections.abc import Callable, Iterator
+from datetime import UTC, datetime
+from uuid import uuid4
+
+import pytest
+from fastapi import FastAPI
+from httpx import AsyncClient
+
+from app.api.deps import get_current_principal, get_recommendation_service
+from app.core.principal import Principal
+from app.core.roles import AccountKind, Role
+from app.models.energy import Recommendation
+from app.services.recommendation import RecommendationNotFoundError
+
+MOMENT = datetime(2024, 1, 1, tzinfo=UTC)
+
+
+def principal(role: Role = Role.LECTEUR) -> Principal:
+    return Principal(
+        id=uuid4(),
+        email=f"{role.value}@enervision.fr",
+        role=role,
+        kind=AccountKind.HUMAIN,
+        must_change_password=False,
+    )
+
+
+def recommendation(recommendation_id: int = 1) -> Recommendation:
+    return Recommendation(
+        recommendation_id=recommendation_id,
+        alert_id=1,
+        action="Vérifier la consommation",
+        explanation="Pic détecté",
+        rule_reference="spike-v1",
+        created_at=MOMENT,
+    )
+
+
+class FauxService:
+    def __init__(self, erreur: Exception | None = None) -> None:
+        self._erreur = erreur
+        self.recommendation = recommendation()
+
+    async def list_all(self) -> list[Recommendation]:
+        return [self.recommendation]
+
+    async def get_by_id(self, recommendation_id: int) -> Recommendation:
+        if self._erreur is not None:
+            raise self._erreur
+        return self.recommendation
+
+
+@pytest.fixture
+def lecteur_connecte(app: FastAPI) -> Iterator[None]:
+    app.dependency_overrides[get_current_principal] = lambda: principal()
+    yield
+    app.dependency_overrides.pop(get_current_principal, None)
+
+
+@pytest.fixture
+def servi(
+    app: FastAPI, lecteur_connecte: None
+) -> Iterator[Callable[[Exception | None], FauxService]]:
+    def installe(erreur: Exception | None = None) -> FauxService:
+        service = FauxService(erreur)
+        app.dependency_overrides[get_recommendation_service] = lambda: service
+        return service
+
+    yield installe
+    app.dependency_overrides.pop(get_recommendation_service, None)
+
+
+async def test_list_recommendations_returns_the_recommendations(
+    servi: Callable[..., FauxService], client: AsyncClient
+) -> None:
+    servi()
+
+    response = await client.get("/api/v1/recommendations")
+
+    assert response.status_code == 200
+    corps = response.json()
+    assert corps == [
+        {
+            "recommendation_id": 1,
+            "alert_id": 1,
+            "action": "Vérifier la consommation",
+            "explanation": "Pic détecté",
+            "rule_reference": "spike-v1",
+            "created_at": "2024-01-01T00:00:00Z",
+        }
+    ]
+
+
+async def test_get_recommendation_returns_the_matching_recommendation(
+    servi: Callable[..., FauxService], client: AsyncClient
+) -> None:
+    servi()
+
+    response = await client.get("/api/v1/recommendations/1")
+
+    assert response.status_code == 200
+    assert response.json()["recommendation_id"] == 1
+
+
+async def test_get_recommendation_returns_404_for_an_unknown_recommendation(
+    servi: Callable[..., FauxService], client: AsyncClient
+) -> None:
+    servi(RecommendationNotFoundError(404))
+
+    response = await client.get("/api/v1/recommendations/404")
+
+    assert response.status_code == 404
+
+
+async def test_list_recommendations_reaches_the_repository_through_the_session(
+    lecteur_connecte: None, fake_session: Callable[..., None], client: AsyncClient
+) -> None:
+    fake_session(result=[recommendation(1), recommendation(2)])
+
+    response = await client.get("/api/v1/recommendations")
+
+    assert response.status_code == 200
+    assert [r["recommendation_id"] for r in response.json()] == [1, 2]
+
+
+async def test_get_recommendation_reaches_the_repository_through_the_session(
+    lecteur_connecte: None, fake_session: Callable[..., None], client: AsyncClient
+) -> None:
+    fake_session(result=recommendation(1))
+
+    response = await client.get("/api/v1/recommendations/1")
+
+    assert response.status_code == 200
+    assert response.json()["recommendation_id"] == 1
+
+
+async def test_get_recommendation_returns_404_when_the_session_finds_nothing(
+    lecteur_connecte: None, fake_session: Callable[..., None], client: AsyncClient
+) -> None:
+    fake_session(result=None)
+
+    response = await client.get("/api/v1/recommendations/404")
+
+    assert response.status_code == 404

apps/backend/tests/api/test_sensors.py

@@ -0,0 +1,91 @@
+from collections.abc import Callable, Iterator
+from datetime import UTC, datetime
+from uuid import uuid4
+
+import pytest
+from fastapi import FastAPI
+from httpx import AsyncClient
+
+from app.api.deps import get_current_principal, get_sensor_service
+from app.core.principal import Principal
+from app.core.roles import AccountKind, Role
+from app.services.sensor import DiagnosticCapteur, EtatCapteurs, SanteCapteurs, SanteSite
+
+TIMESTAMP = datetime(2026, 9, 16, 12, 0, tzinfo=UTC)
+
+
+def principal(role: Role = Role.ADMIN) -> Principal:
+    return Principal(
+        id=uuid4(),
+        email=f"{role.value}@enervision.fr",
+        role=role,
+        kind=AccountKind.HUMAIN,
+        must_change_password=False,
+    )
+
+
+class FauxService:
+    def __init__(self) -> None:
+        ok = DiagnosticCapteur(status="ok", since=None)
+        en_echec = DiagnosticCapteur(status="failing", since=TIMESTAMP)
+        self.etat = EtatCapteurs(
+            timestamp=TIMESTAMP,
+            sites=[
+                SanteSite(
+                    site_id="SITE001",
+                    site_name="Bureau Paris La Défense",
+                    sensors=SanteCapteurs(
+                        consumption=ok,
+                        electrical=ok,
+                        temperature=en_echec,
+                        humidity=ok,
+                        network=ok,
+                    ),
+                    overall="degraded",
+                )
+            ],
+        )
+
+    async def status(self) -> EtatCapteurs:
+        return self.etat
+
+
+@pytest.fixture
+def admin_connecte(app: FastAPI) -> Iterator[None]:
+    app.dependency_overrides[get_current_principal] = lambda: principal()
+    yield
+    app.dependency_overrides.pop(get_current_principal, None)
+
+
+@pytest.fixture
+def servi(app: FastAPI, admin_connecte: None) -> Iterator[Callable[[], FauxService]]:
+    def installe() -> FauxService:
+        service = FauxService()
+        app.dependency_overrides[get_sensor_service] = lambda: service
+        return service
+
+    yield installe
+    app.dependency_overrides.pop(get_sensor_service, None)
+
+
+async def test_get_status_returns_the_service_result(
+    servi: Callable[[], FauxService], client: AsyncClient
+) -> None:
+    servi()
+
+    response = await client.get("/api/v1/sensors/status")
+
+    assert response.status_code == 200
+    corps = response.json()
+    assert corps["sites"][0]["site_id"] == "SITE001"
+    assert corps["sites"][0]["overall"] == "degraded"
+    assert corps["sites"][0]["sensors"]["temperature"]["status"] == "failing"
+    assert corps["sites"][0]["sensors"]["consumption"]["status"] == "ok"
+
+
+async def test_get_status_refuses_a_reader(app: FastAPI, client: AsyncClient) -> None:
+    app.dependency_overrides[get_current_principal] = lambda: principal(Role.LECTEUR)
+
+    response = await client.get("/api/v1/sensors/status")
+
+    assert response.status_code == 403

apps/backend/tests/api/test_sites.py

@@ -0,0 +1,191 @@
+from collections.abc import Callable, Iterator
+from datetime import UTC, datetime
+from uuid import uuid4
+
+import pytest
+from fastapi import FastAPI
+from httpx import AsyncClient
+
+from app.api.deps import get_current_principal, get_site_service
+from app.core.principal import Principal
+from app.core.roles import AccountKind, Role
+from app.models.energy import Site
+from app.services.site import SiteCurrentReading, SiteNotFoundError
+
+TIMESTAMP = datetime(2026, 9, 16, 12, 0, tzinfo=UTC)
+
+
+def principal(role: Role = Role.LECTEUR) -> Principal:
+    return Principal(
+        id=uuid4(),
+        email=f"{role.value}@enervision.fr",
+        role=role,
+        kind=AccountKind.HUMAIN,
+        must_change_password=False,
+    )
+
+
+def site(site_id: str = "site-1") -> Site:
+    return Site(
+        site_id=site_id,
+        site_name="Site de test",
+        site_type="industriel",
+        location="Toulouse",
+        capacity_kw=42.0,
+        status="actif",
+    )
+
+
+def lecture_actuelle(site_id: str = "site-1") -> SiteCurrentReading:
+    return SiteCurrentReading(
+        timestamp=TIMESTAMP,
+        site_id=site_id,
+        site_type="industriel",
+        consumption_kw=87.34,
+        consumption_kwh=87.34,
+        voltage_v=401.2,
+        current_a=132.5,
+        power_factor=0.923,
+        temperature_celsius=22.1,
+        humidity_percent=58.4,
+        null_reasons=[],
+        data_quality="good",
+    )
+
+
+class FauxService:
+    def __init__(self, erreur: Exception | None = None) -> None:
+        self._erreur = erreur
+        self.site = site()
+        self.actuel = lecture_actuelle()
+
+    async def list_all(self) -> list[Site]:
+        return [self.site]
+
+    async def get_by_id(self, site_id: str) -> Site:
+        if self._erreur is not None:
+            raise self._erreur
+        return self.site
+
+    async def current(self, site_id: str) -> SiteCurrentReading:
+        if self._erreur is not None:
+            raise self._erreur
+        return self.actuel
+
+
+@pytest.fixture
+def lecteur_connecte(app: FastAPI) -> Iterator[None]:
+    app.dependency_overrides[get_current_principal] = lambda: principal()
+    yield
+    app.dependency_overrides.pop(get_current_principal, None)
+
+
+@pytest.fixture
+def servi(
+    app: FastAPI, lecteur_connecte: None
+) -> Iterator[Callable[[Exception | None], FauxService]]:
+    def installe(erreur: Exception | None = None) -> FauxService:
+        service = FauxService(erreur)
+        app.dependency_overrides[get_site_service] = lambda: service
+        return service
+
+    yield installe
+    app.dependency_overrides.pop(get_site_service, None)
+
+
+async def test_list_sites_returns_the_sites(
+    servi: Callable[..., FauxService], client: AsyncClient
+) -> None:
+    servi()
+
+    response = await client.get("/api/v1/sites")
+
+    assert response.status_code == 200
+    corps = response.json()
+    assert corps == [
+        {
+            "site_id": "site-1",
+            "site_name": "Site de test",
+            "site_type": "industriel",
+            "location": "Toulouse",
+            "capacity_kw": 42.0,
+            "status": "actif",
+        }
+    ]
+
+
+async def test_get_site_returns_the_matching_site(
+    servi: Callable[..., FauxService], client: AsyncClient
+) -> None:
+    servi()
+
+    response = await client.get("/api/v1/sites/site-1")
+
+    assert response.status_code == 200
+    assert response.json()["site_id"] == "site-1"
+
+
+async def test_get_site_returns_404_for_an_unknown_site(
+    servi: Callable[..., FauxService], client: AsyncClient
+) -> None:
+    servi(SiteNotFoundError("site-inconnu"))
+
+    response = await client.get("/api/v1/sites/site-inconnu")
+
+    assert response.status_code == 404
+
+
+async def test_get_current_returns_the_latest_reading(
+    servi: Callable[..., FauxService], client: AsyncClient
+) -> None:
+    servi()
+
+    response = await client.get("/api/v1/sites/site-1/current")
+
+    assert response.status_code == 200
+    corps = response.json()
+    assert corps["site_id"] == "site-1"
+    assert corps["data_quality"] == "good"
+    assert corps["consumption_kw"] == 87.34
+
+
+async def test_get_current_returns_404_for_an_unknown_site(
+    servi: Callable[..., FauxService], client: AsyncClient
+) -> None:
+    servi(SiteNotFoundError("site-inconnu"))
+
+    response = await client.get("/api/v1/sites/site-inconnu/current")
+
+    assert response.status_code == 404
+
+
+async def test_list_sites_reaches_the_repository_through_the_session(
+    lecteur_connecte: None, fake_session: Callable[..., None], client: AsyncClient
+) -> None:
+    fake_session(result=[site("a"), site("b")])
+
+    response = await client.get("/api/v1/sites")
+
+    assert response.status_code == 200
+    assert [s["site_id"] for s in response.json()] == ["a", "b"]
+
+
+async def test_get_site_reaches_the_repository_through_the_session(
+    lecteur_connecte: None, fake_session: Callable[..., None], client: AsyncClient
+) -> None:
+    fake_session(result=site("a"))
+
+    response = await client.get("/api/v1/sites/a")
+
+    assert response.status_code == 200
+    assert response.json()["site_id"] == "a"
+
+
+async def test_get_site_returns_404_when_the_session_finds_nothing(
+    lecteur_connecte: None, fake_session: Callable[..., None], client: AsyncClient
+) -> None:
+    fake_session(result=None)
+
+    response = await client.get("/api/v1/sites/inconnu")
+
+    assert response.status_code == 404

apps/backend/tests/api/test_stats.py

@@ -0,0 +1,73 @@
+from collections.abc import Callable, Iterator
+from datetime import UTC, datetime
+from uuid import uuid4
+
+import pytest
+from fastapi import FastAPI
+from httpx import AsyncClient
+
+from app.api.deps import get_current_principal, get_stats_service
+from app.core.principal import Principal
+from app.core.roles import AccountKind, Role
+from app.services.stats import ConsumptionSummary, SiteConsumption
+
+
+def principal(role: Role = Role.LECTEUR) -> Principal:
+    return Principal(
+        id=uuid4(),
+        email=f"{role.value}@enervision.fr",
+        role=role,
+        kind=AccountKind.HUMAIN,
+        must_change_password=False,
+    )
+
+
+class FauxService:
+    def __init__(self) -> None:
+        self.resume = ConsumptionSummary(
+            timestamp=datetime.now(UTC),
+            total_sites=1,
+            total_consumption_kw=87.34,
+            total_capacity_kw=200,
+            average_load_percent=43.7,
+            sites=[
+                SiteConsumption(
+                    site_id="SITE001",
+                    site_name="Bureau Paris La Défense",
+                    current_consumption_kw=87.34,
+                    capacity_kw=200,
+                    load_percent=43.7,
+                    data_quality="good",
+                )
+            ],
+        )
+
+    async def summary(self) -> ConsumptionSummary:
+        return self.resume
+
+
+@pytest.fixture
+def servi(app: FastAPI) -> Iterator[Callable[[], FauxService]]:
+    def installe() -> FauxService:
+        service = FauxService()
+        app.dependency_overrides[get_stats_service] = lambda: service
+        app.dependency_overrides[get_current_principal] = lambda: principal()
+        return service
+
+    yield installe
+    app.dependency_overrides.pop(get_stats_service, None)
+    app.dependency_overrides.pop(get_current_principal, None)
+
+
+async def test_get_summary_returns_the_service_result(
+    servi: Callable[[], FauxService], client: AsyncClient
+) -> None:
+    servi()
+
+    response = await client.get("/api/v1/stats/summary")
+
+    assert response.status_code == 200
+    corps = response.json()
+    assert corps["total_sites"] == 1
+    assert corps["sites"][0]["site_id"] == "SITE001"
+    assert corps["sites"][0]["data_quality"] == "good"

apps/backend/tests/db/test_data_schema.py

@@ -0,0 +1,261 @@
+from collections.abc import AsyncIterator
+from datetime import UTC, datetime
+from uuid import uuid4
+
+import pytest
+from sqlalchemy import insert, select, text
+from sqlalchemy.engine import make_url
+from sqlalchemy.exc import IntegrityError
+from sqlalchemy.ext.asyncio import AsyncConnection, create_async_engine
+
+from app.core.config import get_settings
+from app.models.energy import Alert, Dataset, Prediction, Reading, Recommendation, Site
+
+pytestmark = pytest.mark.integration
+MOMENT = datetime(2024, 1, 1, tzinfo=UTC)
+
+
+@pytest.fixture
+async def data_connection() -> AsyncIterator[AsyncConnection]:
+    url = make_url(get_settings().database_url)
+    if url.database != "enervision_test":
+        pytest.fail("Ces tests exigent DATABASE_URL vers enervision_test.")
+    engine = create_async_engine(url)
+    try:
+        async with engine.connect() as connection:
+            transaction = await connection.begin()
+            try:
+                yield connection
+            finally:
+                await transaction.rollback()
+    finally:
+        await engine.dispose()
+
+
+@pytest.fixture
+async def data_site(data_connection: AsyncConnection) -> str:
+    site_id = f"TEST-{uuid4()}"
+    await data_connection.execute(
+        insert(Site).values(site_id=site_id, site_name="Site de test", site_type="office")
+    )
+    return site_id
+
+
+async def test_reading_is_a_time_hypertable_when_migrated(
+    data_connection: AsyncConnection,
+) -> None:
+    query = text(
+        "SELECT column_name FROM timescaledb_information.dimensions "
+        "WHERE hypertable_schema = 'public' AND hypertable_name = 'reading'"
+    )
+
+    result = await data_connection.execute(query)
+
+    assert result.scalars().all() == ["timestamp"]
+
+
+async def test_reading_preserves_null_and_zero_when_inserted(
+    data_connection: AsyncConnection, data_site: str
+) -> None:
+    statement = insert(Reading).values(
+        site_id=data_site,
+        timestamp=MOMENT,
+        source="api_current",
+        consumption_kw=None,
+        consumption_kwh=0,
+        data_quality="partial",
+        null_reasons=["sensor_failure"],
+        raw_data={"consumption_kw": None},
+        imputed_values=None,
+        imputation_method=None,
+    )
+
+    await data_connection.execute(statement)
+    result = (
+        await data_connection.execute(
+            select(
+                Reading.consumption_kw,
+                Reading.consumption_kwh,
+                Reading.raw_data,
+                Reading.imputed_values,
+            ).where(Reading.site_id == data_site)
+        )
+    ).one()
+
+    assert tuple(result) == (None, 0, {"consumption_kw": None}, None)
+
+
+@pytest.mark.parametrize("source", ["csv", "api_current", "api_history"])
+async def test_duplicate_reading_is_rejected_when_key_matches(
+    data_connection: AsyncConnection, data_site: str, source: str
+) -> None:
+    dataset_id = None
+    if source == "csv":
+        dataset_id = (
+            await data_connection.execute(
+                insert(Dataset.__table__)
+                .values(
+                    dataset_name="Archive de test",
+                    archive_sha256=uuid4().hex + uuid4().hex,
+                    storage_uri="test://archive",
+                    metadata={},
+                )
+                .returning(Dataset.dataset_id)
+            )
+        ).scalar_one()
+    statement = insert(Reading).values(
+        site_id=data_site,
+        timestamp=MOMENT,
+        source=source,
+        dataset_id=dataset_id,
+        raw_data={},
+    )
+    await data_connection.execute(statement)
+
+    with pytest.raises(IntegrityError):
+        async with data_connection.begin_nested():
+            await data_connection.execute(statement)
+
+
+@pytest.mark.parametrize(
+    "changes",
+    [
+        {"source": "csv"},
+        {"source": "unknown"},
+        {"site_id": "UNKNOWN-SITE"},
+        {"data_quality": "unknown"},
+        {"imputed_values": {"consumption_kw": 12}},
+        {"imputation_method": "mean-v1"},
+    ],
+    ids=[
+        "csv_sans_dataset",
+        "source_inconnue",
+        "site_absent",
+        "qualite_inconnue",
+        "imputation_sans_methode",
+        "methode_sans_imputation",
+    ],
+)
+async def test_invalid_reading_is_rejected_when_constraints_fail(
+    data_connection: AsyncConnection, data_site: str, changes: dict[str, object]
+) -> None:
+    values: dict[str, object] = {
+        "site_id": data_site,
+        "timestamp": MOMENT,
+        "source": "api_current",
+        "raw_data": {},
+    }
+    values.update(changes)
+
+    with pytest.raises(IntegrityError):
+        async with data_connection.begin_nested():
+            await data_connection.execute(insert(Reading).values(**values))
+
+
+async def test_prediction_requires_period_when_energy_is_predicted(
+    data_connection: AsyncConnection, data_site: str
+) -> None:
+    statement = insert(Prediction).values(
+        site_id=data_site,
+        target_at=MOMENT,
+        target_metric="consumption_kwh",
+        predicted_value=12,
+        status="available",
+        model_reference="test-model/1",
+    )
+
+    with pytest.raises(IntegrityError):
+        async with data_connection.begin_nested():
+            await data_connection.execute(statement)
+
+
+async def test_unavailable_prediction_preserves_null_when_inserted(
+    data_connection: AsyncConnection, data_site: str
+) -> None:
+    statement = (
+        insert(Prediction)
+        .values(
+            site_id=data_site,
+            target_at=MOMENT,
+            target_metric="consumption_kw",
+            status="insufficient_data",
+            failure_reason="Historique trop court",
+            model_reference="test-model/1",
+        )
+        .returning(Prediction.predicted_value)
+    )
+
+    value = (await data_connection.execute(statement)).scalar_one()
+
+    assert value is None
+
+
+async def test_alert_rejects_prediction_when_site_differs(
+    data_connection: AsyncConnection, data_site: str
+) -> None:
+    other_site = f"TEST-{uuid4()}"
+    await data_connection.execute(
+        insert(Site).values(site_id=other_site, site_name="Autre site", site_type="office")
+    )
+    prediction_id = (
+        await data_connection.execute(
+            insert(Prediction)
+            .values(
+                site_id=data_site,
+                target_at=MOMENT,
+                target_metric="consumption_kw",
+                predicted_value=12,
+                status="available",
+                model_reference="test-model/1",
+            )
+            .returning(Prediction.prediction_id)
+        )
+    ).scalar_one()
+
+    with pytest.raises(IntegrityError):
+        async with data_connection.begin_nested():
+            await data_connection.execute(
+                insert(Alert).values(
+                    source_alert_id=str(uuid4()),
+                    site_id=other_site,
+                    source="enervision",
+                    timestamp=MOMENT,
+                    type="spike",
+                    severity="high",
+                    message="Test",
+                    prediction_id=prediction_id,
+                    raw_data={},
+                )
+            )
+
+
+async def test_recommendation_is_unique_when_alert_and_rule_match(
+    data_connection: AsyncConnection, data_site: str
+) -> None:
+    alert_id = (
+        await data_connection.execute(
+            insert(Alert)
+            .values(
+                source_alert_id=str(uuid4()),
+                site_id=data_site,
+                source="api_mock",
+                timestamp=MOMENT,
+                type="spike",
+                severity="high",
+                message="Test",
+                raw_data={},
+            )
+            .returning(Alert.alert_id)
+        )
+    ).scalar_one()
+    statement = insert(Recommendation).values(
+        alert_id=alert_id,
+        action="Vérifier la consommation",
+        explanation="Pic détecté",
+        rule_reference="spike-v1",
+    )
+    await data_connection.execute(statement)
+
+    with pytest.raises(IntegrityError):
+        async with data_connection.begin_nested():
+            await data_connection.execute(statement)

apps/backend/tests/etl/test_historical_import.py

@@ -0,0 +1,239 @@
+import hashlib
+import json
+
+import pandas as pd
+import pytest
+
+from app.etl.historical_import import (
+    SOURCE_NAME,
+    build_reading_batch,
+    classify_quality,
+    compute_sha256,
+    load_metadata,
+    normalize_timestamps,
+    validate_source,
+)
+
+
+def make_metadata() -> dict:
+    return {
+        "total_records": 2,
+        "sites": {
+            "SITE001": {},
+        },
+    }
+
+
+def make_dataframe() -> pd.DataFrame:
+    return pd.DataFrame(
+        [
+            {
+                "timestamp": "2023-01-01 00:00:00",
+                "site_id": "SITE001",
+                "site_type": "office",
+                "site_name": "Site 1",
+                "consumption_kwh": 10.5,
+                "consumption_euros": 2.5,
+                "temperature_celsius": 20.0,
+                "humidity_percent": 50.0,
+                "solar_irradiance_wm2": 0.0,
+                "hour": 0,
+                "day_of_week": 6,
+                "day_name": "Sunday",
+                "month": 1,
+                "is_weekend": True,
+                "is_working_hours": False,
+            },
+            {
+                "timestamp": "2023-01-01 01:00:00",
+                "site_id": "SITE001",
+                "site_type": "office",
+                "site_name": "Site 1",
+                "consumption_kwh": 11.0,
+                "consumption_euros": 2.7,
+                "temperature_celsius": 19.5,
+                "humidity_percent": 52.0,
+                "solar_irradiance_wm2": 0.0,
+                "hour": 1,
+                "day_of_week": 6,
+                "day_name": "Sunday",
+                "month": 1,
+                "is_weekend": True,
+                "is_working_hours": False,
+            },
+        ]
+    )
+
+
+def test_compute_sha256(tmp_path):
+    file_path = tmp_path / "dataset.csv"
+    content = b"hello-enervision"
+
+    file_path.write_bytes(content)
+
+    expected = hashlib.sha256(content).hexdigest()
+
+    assert compute_sha256(file_path) == expected
+
+
+def test_load_metadata(tmp_path):
+    metadata_path = tmp_path / "metadata.json"
+
+    metadata = {
+        "total_records": 2,
+        "sites": {
+            "SITE001": {},
+        },
+    }
+
+    metadata_path.write_text(
+        json.dumps(metadata),
+        encoding="utf-8",
+    )
+
+    assert load_metadata(metadata_path) == metadata
+
+
+def test_validate_source_accepts_valid_dataset():
+    frame = make_dataframe()
+
+    validate_source(
+        frame,
+        make_metadata(),
+    )
+
+
+def test_validate_source_rejects_missing_column():
+    frame = make_dataframe().drop(columns=["consumption_kwh"])
+
+    with pytest.raises(
+        ValueError,
+        match="Colonnes obligatoires absentes",
+    ):
+        validate_source(
+            frame,
+            make_metadata(),
+        )
+
+
+def test_validate_source_rejects_duplicates():
+    frame = make_dataframe()
+
+    frame.loc[1, "timestamp"] = frame.loc[
+        0,
+        "timestamp",
+    ]
+
+    with pytest.raises(
+        ValueError,
+        match="doublons",
+    ):
+        validate_source(
+            frame,
+            make_metadata(),
+        )
+
+
+def test_validate_source_rejects_unknown_site():
+    frame = make_dataframe()
+
+    frame.loc[1, "site_id"] = "SITE999"
+
+    with pytest.raises(
+        ValueError,
+        match="Sites incohérents",
+    ):
+        validate_source(
+            frame,
+            make_metadata(),
+        )
+
+
+def test_normalize_timestamps_adds_timezone():
+    frame = make_dataframe()
+
+    normalized = normalize_timestamps(
+        frame,
+        "UTC",
+    )
+
+    assert normalized["timestamp"].dt.tz is not None
+
+    assert "_source_timestamp" in normalized.columns
+
+
+def test_classify_quality_good():
+    row = make_dataframe().iloc[0].to_dict()
+
+    quality, reasons = classify_quality(row)
+
+    assert quality == "good"
+    assert reasons == []
+
+
+def test_classify_quality_degraded_when_consumption_missing():
+    row = make_dataframe().iloc[0].to_dict()
+    row["consumption_kwh"] = None
+
+    quality, reasons = classify_quality(row)
+
+    assert quality == "degraded"
+
+    assert "missing:consumption_kwh" in reasons
+
+
+def test_build_reading_batch_respects_database_contract():
+    frame = normalize_timestamps(
+        make_dataframe(),
+        "UTC",
+    )
+
+    rows = build_reading_batch(
+        frame.iloc[:1],
+        dataset_id=3,
+    )
+
+    assert len(rows) == 1
+
+    row = rows[0]
+
+    assert row["dataset_id"] == 3
+
+    # Important :
+    # contrainte ck_reading_dataset_source.
+    assert row["source"] == "csv"
+    assert SOURCE_NAME == "csv"
+
+    # Important :
+    # contrainte ck_reading_imputation.
+    assert row["imputed_values"] is None
+    assert row["imputation_method"] is None
+
+    assert row["data_quality"] == "good"
+    assert row["null_reasons"] == []
+
+
+def test_build_reading_batch_keeps_missing_values():
+    frame = make_dataframe()
+
+    frame.loc[0, "temperature_celsius"] = None
+
+    frame = normalize_timestamps(
+        frame,
+        "UTC",
+    )
+
+    rows = build_reading_batch(
+        frame.iloc[:1],
+        dataset_id=3,
+    )
+
+    row = rows[0]
+
+    assert row["temperature_celsius"] is None
+
+    assert "missing:temperature_celsius" in row["null_reasons"]
+
+    # RAW ingestion : aucune imputation.
+    assert row["imputed_values"] is None
+    assert row["imputation_method"] is None

apps/backend/tests/factories.py

@@ -1,3 +1,4 @@
+from collections.abc import Sequence
 from typing import Any
 
 from app.core.config import Settings
@@ -12,6 +13,16 @@ SETTINGS_DE_TEST: dict[str, Any] = {
 }
 
 
+class FakeScalars:
+    """Resultat factice pour `.scalars()` : `.all()` renvoie les lignes fournies."""
+
+    def __init__(self, rows: Sequence[object]) -> None:
+        self._rows = rows
+
+    def all(self) -> Sequence[object]:
+        return self._rows
+
+
 class FakeSession:
     """Session factice : renvoie `result`, ou leve `failure` si elle est fournie."""
 
@@ -25,6 +36,9 @@ class FakeSession:
     async def execute(self, *_: object, **__: object) -> object:
         return self._repondre()
 
+    async def scalars(self, *_: object, **__: object) -> FakeScalars:
+        return FakeScalars(self._repondre() or [])
+
     def _repondre(self) -> object:
         if self._failure is not None:
             raise self._failure

apps/backend/tests/repositories/test_alert.py

@@ -0,0 +1,91 @@
+import uuid
+from datetime import UTC, datetime
+
+import pytest
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.energy import Alert
+from app.repositories.alert import AlertRepository
+from app.schemas.alert import AlertSeverity
+from tests.repositories.test_site import creer as creer_site
+from tests.repositories.test_site import identifiant as identifiant_site
+
+pytestmark = pytest.mark.integration
+
+
+async def creer_alerte(session: AsyncSession, *, site_id: str, **overrides: object) -> Alert:
+    alerte = Alert(
+        source_alert_id=overrides.get("source_alert_id", f"ALR-{uuid.uuid4().hex[:12]}"),
+        site_id=site_id,
+        source=overrides.get("source", "enervision"),
+        timestamp=overrides.get("timestamp", datetime(2026, 9, 16, tzinfo=UTC)),
+        type=overrides.get("type", "threshold"),
+        severity=overrides.get("severity", "high"),
+        message=overrides.get("message", "Dépassement du seuil configuré"),
+        value=overrides.get("value", 812.5),
+        threshold=overrides.get("threshold", 720.0),
+        metric=overrides.get("metric", "consumption_kw"),
+        prediction_id=overrides.get("prediction_id"),
+        raw_data=overrides.get("raw_data", {}),
+    )
+    session.add(alerte)
+    await session.flush()
+    return alerte
+
+
+async def test_list_all_returns_the_alerts_sorted_by_timestamp_descending(
+    session: AsyncSession,
+) -> None:
+    site = await creer_site(session)
+    depot = AlertRepository(session)
+    ancienne = await creer_alerte(
+        session, site_id=site.site_id, timestamp=datetime(2026, 9, 1, tzinfo=UTC)
+    )
+    recente = await creer_alerte(
+        session, site_id=site.site_id, timestamp=datetime(2026, 9, 15, tzinfo=UTC)
+    )
+
+    alertes = await depot.list_all()
+    identifiants = [
+        a.alert_id for a in alertes if a.alert_id in (ancienne.alert_id, recente.alert_id)
+    ]
+    await session.rollback()
+
+    assert identifiants == [recente.alert_id, ancienne.alert_id]
+
+
+async def test_list_all_filters_by_site_id(session: AsyncSession) -> None:
+    premier = await creer_site(session)
+    second = await creer_site(session)
+    depot = AlertRepository(session)
+    voulue = await creer_alerte(session, site_id=premier.site_id)
+    await creer_alerte(session, site_id=second.site_id)
+
+    alertes = await depot.list_all(site_id=premier.site_id)
+    identifiants = [a.alert_id for a in alertes]
+    await session.rollback()
+
+    assert identifiants == [voulue.alert_id]
+
+
+async def test_list_all_filters_by_severity(session: AsyncSession) -> None:
+    site = await creer_site(session)
+    depot = AlertRepository(session)
+    voulue = await creer_alerte(session, site_id=site.site_id, severity="critical")
+    await creer_alerte(session, site_id=site.site_id, severity="low")
+
+    alertes = await depot.list_all(severity=AlertSeverity.CRITICAL)
+    identifiants = [a.alert_id for a in alertes]
+    await session.rollback()
+
+    assert identifiants == [voulue.alert_id]
+
+
+async def test_list_all_returns_an_empty_list_when_there_is_nothing(
+    session: AsyncSession,
+) -> None:
+    depot = AlertRepository(session)
+
+    alertes = await depot.list_all(site_id=identifiant_site())
+
+    assert list(alertes) == []

apps/backend/tests/repositories/test_reading.py

@@ -0,0 +1,262 @@
+import uuid
+from datetime import UTC, datetime, timedelta
+
+import pytest
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.energy import Reading, Site
+from app.repositories.reading import ReadingRepository
+from tests.repositories.test_site import creer as creer_site
+from tests.repositories.test_site import identifiant as identifiant_site
+
+pytestmark = pytest.mark.integration
+
+
+def identifiant() -> str:
+    return f"SITE-{uuid.uuid4().hex[:8]}"
+
+
+def lecture(site_id: str, *, timestamp: datetime, consumption_kw: float) -> Reading:
+    return Reading(
+        site_id=site_id,
+        timestamp=timestamp,
+        source="api_current",
+        consumption_kw=consumption_kw,
+        data_quality="good",
+        raw_data={},
+    )
+
+
+async def creer_lecture(session: AsyncSession, *, site_id: str, **overrides: object) -> Reading:
+    reading = Reading(
+        site_id=site_id,
+        timestamp=overrides.get("timestamp", datetime(2026, 9, 16, tzinfo=UTC)),
+        source=overrides.get("source", "api_current"),
+        consumption_kw=overrides.get("consumption_kw", 10.0),
+        data_quality=overrides.get("data_quality", "good"),
+        raw_data=overrides.get("raw_data", {}),
+    )
+    session.add(reading)
+    await session.flush()
+    return reading
+
+
+async def test_latest_by_site_keeps_only_the_most_recent_reading(session: AsyncSession) -> None:
+    site_id = identifiant()
+    maintenant = datetime.now(UTC)
+    session.add(Site(site_id=site_id, site_name="Site", site_type="bureau", capacity_kw=100))
+    await session.flush()
+    session.add_all(
+        [
+            lecture(site_id, timestamp=maintenant - timedelta(hours=1), consumption_kw=10),
+            lecture(site_id, timestamp=maintenant, consumption_kw=42),
+        ]
+    )
+    await session.flush()
+    depot = ReadingRepository(session)
+
+    resultats = await depot.latest_by_site()
+    consommations = [r.consumption_kw for r in resultats if r.site_id == site_id]
+    await session.rollback()
+
+    assert consommations == [42]
+
+
+async def test_latest_by_site_returns_one_row_per_site(session: AsyncSession) -> None:
+    premier, second = identifiant(), identifiant()
+    maintenant = datetime.now(UTC)
+    session.add_all(
+        [
+            Site(site_id=premier, site_name="A", site_type="bureau", capacity_kw=100),
+            Site(site_id=second, site_name="B", site_type="bureau", capacity_kw=200),
+        ]
+    )
+    await session.flush()
+    session.add_all(
+        [
+            lecture(premier, timestamp=maintenant, consumption_kw=10),
+            lecture(second, timestamp=maintenant, consumption_kw=20),
+        ]
+    )
+    await session.flush()
+    depot = ReadingRepository(session)
+
+    resultats = await depot.latest_by_site()
+    identifiants = {r.site_id for r in resultats if r.site_id in (premier, second)}
+    await session.rollback()
+
+    assert identifiants == {premier, second}
+
+
+async def test_latest_by_site_breaks_a_timestamp_tie_on_the_last_written_reading(
+    session: AsyncSession,
+) -> None:
+    site = await creer_site(session)
+    depot = ReadingRepository(session)
+    horodatage = datetime(2026, 9, 15, tzinfo=UTC)
+    await creer_lecture(
+        session, site_id=site.site_id, timestamp=horodatage, source="api_history", consumption_kw=10
+    )
+    derniere = await creer_lecture(
+        session, site_id=site.site_id, timestamp=horodatage, source="api_current", consumption_kw=42
+    )
+
+    resultats = await depot.latest_by_site()
+    retenues = [r.reading_id for r in resultats if r.site_id == site.site_id]
+    await session.rollback()
+
+    assert retenues == [derniere.reading_id]
+
+
+async def test_latest_for_site_returns_the_most_recent_reading(session: AsyncSession) -> None:
+    site = await creer_site(session)
+    depot = ReadingRepository(session)
+    await creer_lecture(session, site_id=site.site_id, timestamp=datetime(2026, 9, 1, tzinfo=UTC))
+    recente = await creer_lecture(
+        session, site_id=site.site_id, timestamp=datetime(2026, 9, 15, tzinfo=UTC)
+    )
+
+    trouvee = await depot.latest_for_site(site.site_id)
+    reading_id = trouvee.reading_id if trouvee else None
+    await session.rollback()
+
+    assert reading_id == recente.reading_id
+
+
+async def test_latest_for_site_breaks_a_timestamp_tie_on_the_last_written_reading(
+    session: AsyncSession,
+) -> None:
+    site = await creer_site(session)
+    depot = ReadingRepository(session)
+    horodatage = datetime(2026, 9, 15, tzinfo=UTC)
+    await creer_lecture(session, site_id=site.site_id, timestamp=horodatage, source="api_history")
+    derniere = await creer_lecture(
+        session, site_id=site.site_id, timestamp=horodatage, source="api_current"
+    )
+
+    trouvee = await depot.latest_for_site(site.site_id)
+    reading_id = trouvee.reading_id if trouvee else None
+    await session.rollback()
+
+    assert reading_id == derniere.reading_id
+
+
+async def test_latest_for_site_ignores_the_readings_of_the_other_sites(
+    session: AsyncSession,
+) -> None:
+    sans_lecture = await creer_site(session)
+    autre = await creer_site(session)
+    depot = ReadingRepository(session)
+    await creer_lecture(session, site_id=autre.site_id)
+
+    trouvee = await depot.latest_for_site(sans_lecture.site_id)
+    await session.rollback()
+
+    assert trouvee is None
+
+
+async def test_list_history_orders_the_readings_by_timestamp_descending(
+    session: AsyncSession,
+) -> None:
+    site = await creer_site(session)
+    depot = ReadingRepository(session)
+    ancienne = await creer_lecture(
+        session, site_id=site.site_id, timestamp=datetime(2026, 9, 1, tzinfo=UTC)
+    )
+    recente = await creer_lecture(
+        session, site_id=site.site_id, timestamp=datetime(2026, 9, 15, tzinfo=UTC)
+    )
+
+    resultats = await depot.list_history(
+        start=datetime(2026, 8, 1, tzinfo=UTC),
+        end=datetime(2026, 10, 1, tzinfo=UTC),
+        limit=100,
+        offset=0,
+    )
+    identifiants = [
+        r.reading_id for r in resultats if r.reading_id in (ancienne.reading_id, recente.reading_id)
+    ]
+    await session.rollback()
+
+    assert identifiants == [recente.reading_id, ancienne.reading_id]
+
+
+async def test_list_history_filters_by_site_id(session: AsyncSession) -> None:
+    premier = await creer_site(session)
+    second = await creer_site(session)
+    depot = ReadingRepository(session)
+    voulue = await creer_lecture(session, site_id=premier.site_id)
+    await creer_lecture(session, site_id=second.site_id)
+
+    resultats = await depot.list_history(
+        site_id=premier.site_id,
+        start=datetime(2026, 8, 1, tzinfo=UTC),
+        end=datetime(2026, 10, 1, tzinfo=UTC),
+        limit=100,
+        offset=0,
+    )
+    identifiants = [r.reading_id for r in resultats]
+    await session.rollback()
+
+    assert identifiants == [voulue.reading_id]
+
+
+async def test_list_history_excludes_readings_outside_the_window(session: AsyncSession) -> None:
+    site = await creer_site(session)
+    depot = ReadingRepository(session)
+    dedans = await creer_lecture(
+        session, site_id=site.site_id, timestamp=datetime(2026, 9, 10, tzinfo=UTC)
+    )
+    await creer_lecture(session, site_id=site.site_id, timestamp=datetime(2026, 8, 1, tzinfo=UTC))
+    await creer_lecture(session, site_id=site.site_id, timestamp=datetime(2026, 10, 1, tzinfo=UTC))
+
+    resultats = await depot.list_history(
+        site_id=site.site_id,
+        start=datetime(2026, 9, 1, tzinfo=UTC),
+        end=datetime(2026, 9, 30, tzinfo=UTC),
+        limit=100,
+        offset=0,
+    )
+    identifiants = [r.reading_id for r in resultats]
+    await session.rollback()
+
+    assert identifiants == [dedans.reading_id]
+
+
+async def test_list_history_respects_limit_and_offset(session: AsyncSession) -> None:
+    site = await creer_site(session)
+    depot = ReadingRepository(session)
+    lectures = [
+        await creer_lecture(
+            session, site_id=site.site_id, timestamp=datetime(2026, 9, jour, tzinfo=UTC)
+        )
+        for jour in (1, 2, 3)
+    ]
+
+    resultats = await depot.list_history(
+        site_id=site.site_id,
+        start=datetime(2026, 8, 1, tzinfo=UTC),
+        end=datetime(2026, 10, 1, tzinfo=UTC),
+        limit=1,
+        offset=1,
+    )
+    identifiants = [r.reading_id for r in resultats]
+    await session.rollback()
+
+    assert identifiants == [lectures[1].reading_id]
+
+
+async def test_list_history_returns_an_empty_list_when_there_is_nothing(
+    session: AsyncSession,
+) -> None:
+    depot = ReadingRepository(session)
+
+    resultats = await depot.list_history(
+        site_id=identifiant_site(),
+        start=datetime(2026, 8, 1, tzinfo=UTC),
+        end=datetime(2026, 10, 1, tzinfo=UTC),
+        limit=100,
+        offset=0,
+    )
+
+    assert list(resultats) == []

apps/backend/tests/repositories/test_recommendation.py

@@ -0,0 +1,85 @@
+import uuid
+from datetime import UTC, datetime
+
+import pytest
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.energy import Alert, Recommendation, Site
+from app.repositories.recommendation import RecommendationRepository
+
+pytestmark = pytest.mark.integration
+
+MOMENT = datetime(2024, 1, 1, tzinfo=UTC)
+
+
+async def creer_site(session: AsyncSession) -> str:
+    site_id = f"TEST-{uuid.uuid4()}"
+    session.add(Site(site_id=site_id, site_name="Site de test", site_type="office"))
+    await session.flush()
+    return site_id
+
+
+async def creer_alerte(session: AsyncSession) -> int:
+    site_id = await creer_site(session)
+    alerte = Alert(
+        source_alert_id=str(uuid.uuid4()),
+        site_id=site_id,
+        source="api_mock",
+        timestamp=MOMENT,
+        type="spike",
+        severity="high",
+        message="Test",
+        raw_data={},
+    )
+    session.add(alerte)
+    await session.flush()
+    return alerte.alert_id
+
+
+async def creer(session: AsyncSession, **overrides: object) -> Recommendation:
+    recommendation = Recommendation(
+        alert_id=overrides.get("alert_id") or await creer_alerte(session),
+        action=overrides.get("action", "Vérifier la consommation"),
+        explanation=overrides.get("explanation", "Pic détecté"),
+        rule_reference=overrides.get("rule_reference", f"spike-{uuid.uuid4().hex[:8]}"),
+    )
+    session.add(recommendation)
+    await session.flush()
+    return recommendation
+
+
+async def test_get_by_id_returns_the_matching_recommendation(session: AsyncSession) -> None:
+    depot = RecommendationRepository(session)
+    cree = await creer(session)
+
+    trouve = await depot.get_by_id(cree.recommendation_id)
+    action = trouve.action if trouve else None
+    await session.rollback()
+
+    assert action == "Vérifier la consommation"
+
+
+async def test_get_by_id_returns_nothing_for_an_unknown_identifier(
+    session: AsyncSession,
+) -> None:
+    trouve = await RecommendationRepository(session).get_by_id(0)
+
+    assert trouve is None
+
+
+async def test_list_all_returns_the_recommendations_sorted_by_identifier(
+    session: AsyncSession,
+) -> None:
+    depot = RecommendationRepository(session)
+    premiere = await creer(session)
+    seconde = await creer(session)
+
+    recommendations = await depot.list_all()
+    identifiants = [
+        r.recommendation_id
+        for r in recommendations
+        if r.recommendation_id in (premiere.recommendation_id, seconde.recommendation_id)
+    ]
+    await session.rollback()
+
+    assert identifiants == sorted(identifiants)

apps/backend/tests/repositories/test_site.py

@@ -0,0 +1,59 @@
+import uuid
+
+import pytest
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.energy import Site
+from app.repositories.site import SiteRepository
+
+pytestmark = pytest.mark.integration
+
+
+def identifiant() -> str:
+    return f"site-{uuid.uuid4().hex[:12]}"
+
+
+async def creer(session: AsyncSession, **overrides: object) -> Site:
+    site = Site(
+        site_id=overrides.get("site_id", identifiant()),
+        site_name=overrides.get("site_name", "Site de test"),
+        site_type=overrides.get("site_type", "industriel"),
+        location=overrides.get("location", "Toulouse"),
+        capacity_kw=overrides.get("capacity_kw", 42.0),
+        status=overrides.get("status", "actif"),
+    )
+    session.add(site)
+    await session.flush()
+    return site
+
+
+async def test_get_by_id_returns_the_matching_site(session: AsyncSession) -> None:
+    depot = SiteRepository(session)
+    cree = await creer(session)
+
+    trouve = await depot.get_by_id(cree.site_id)
+    nom = trouve.site_name if trouve else None
+    await session.rollback()
+
+    assert nom == "Site de test"
+
+
+async def test_get_by_id_returns_nothing_for_an_unknown_identifier(
+    session: AsyncSession,
+) -> None:
+    trouve = await SiteRepository(session).get_by_id(identifiant())
+
+    assert trouve is None
+
+
+async def test_list_all_returns_the_sites_sorted_by_identifier(session: AsyncSession) -> None:
+    depot = SiteRepository(session)
+    premier, second = sorted([f"zz-{identifiant()}", f"aa-{identifiant()}"])
+    await creer(session, site_id=second)
+    await creer(session, site_id=premier)
+
+    sites = await depot.list_all()
+    identifiants = [site.site_id for site in sites if site.site_id in (premier, second)]
+    await session.rollback()
+
+    assert identifiants == [premier, second]

apps/backend/tests/services/test_alert.py

@@ -0,0 +1,55 @@
+from datetime import UTC, datetime
+
+from app.models.energy import Alert
+from app.services.alert import AlertService
+
+
+def alert(
+    alert_id: int = 1,
+    site_id: str = "site-1",
+    severity: str = "high",
+) -> Alert:
+    return Alert(
+        alert_id=alert_id,
+        source_alert_id=f"ALR-{alert_id}",
+        site_id=site_id,
+        source="enervision",
+        timestamp=datetime(2026, 9, 16, tzinfo=UTC),
+        type="threshold",
+        severity=severity,
+        message="Dépassement du seuil configuré",
+        value=812.5,
+        threshold=720.0,
+        metric="consumption_kw",
+        prediction_id=None,
+        raw_data={},
+    )
+
+
+class FakeRepository:
+    def __init__(self, alerts: list[Alert]) -> None:
+        self._alerts = alerts
+        self.appels: list[tuple[str | None, str | None]] = []
+
+    async def list_all(
+        self, *, site_id: str | None = None, severity: str | None = None
+    ) -> list[Alert]:
+        self.appels.append((site_id, severity))
+        return self._alerts
+
+
+async def test_list_all_returns_the_repository_alerts() -> None:
+    service = AlertService(alerts=FakeRepository([alert(1), alert(2)]))
+
+    alertes = await service.list_all()
+
+    assert [a.alert_id for a in alertes] == [1, 2]
+
+
+async def test_list_all_relays_the_filters_to_the_repository() -> None:
+    depot = FakeRepository([])
+    service = AlertService(alerts=depot)
+
+    await service.list_all(site_id="site-1", severity="critical")
+
+    assert depot.appels == [("site-1", "critical")]

apps/backend/tests/services/test_reading.py

@@ -0,0 +1,153 @@
+from datetime import UTC, datetime, timedelta
+
+import pytest
+
+from app.models.energy import Reading
+from app.services.reading import (
+    FENETRE_MAXIMALE,
+    FENETRE_PAR_DEFAUT,
+    FenetreInverseeError,
+    FenetreTropLargeError,
+    ReadingService,
+)
+
+
+def reading(reading_id: int = 1, site_id: str = "site-1") -> Reading:
+    return Reading(
+        reading_id=reading_id,
+        site_id=site_id,
+        timestamp=datetime(2026, 9, 16, tzinfo=UTC),
+        source="api_current",
+        consumption_kw=10.0,
+        data_quality="good",
+        raw_data={},
+    )
+
+
+class FakeRepository:
+    def __init__(self, readings: list[Reading]) -> None:
+        self._readings = readings
+        self.appels: list[tuple[str | None, datetime, datetime, int, int]] = []
+
+    async def list_history(
+        self,
+        *,
+        start: datetime,
+        end: datetime,
+        site_id: str | None = None,
+        limit: int,
+        offset: int,
+    ) -> list[Reading]:
+        self.appels.append((site_id, start, end, limit, offset))
+        return self._readings
+
+
+async def test_list_history_returns_the_repository_readings() -> None:
+    service = ReadingService(readings=FakeRepository([reading(1), reading(2)]))
+
+    lectures = await service.list_history(limit=500, offset=0)
+
+    assert [r.reading_id for r in lectures] == [1, 2]
+
+
+async def test_list_history_relays_the_site_id_limit_and_offset() -> None:
+    depot = FakeRepository([])
+    service = ReadingService(readings=depot)
+    debut = datetime(2026, 9, 1, tzinfo=UTC)
+    fin = datetime(2026, 9, 2, tzinfo=UTC)
+
+    await service.list_history(site_id="site-1", start=debut, end=fin, limit=50, offset=10)
+
+    assert depot.appels == [("site-1", debut, fin, 50, 10)]
+
+
+async def test_list_history_defaults_to_the_last_24_hours_when_no_window_is_given() -> None:
+    depot = FakeRepository([])
+    service = ReadingService(readings=depot)
+    avant = datetime.now(UTC)
+
+    await service.list_history(limit=500, offset=0)
+
+    apres = datetime.now(UTC)
+    _, debut, fin, _, _ = depot.appels[0]
+    assert avant <= fin <= apres
+    assert fin - debut == FENETRE_PAR_DEFAUT
+
+
+async def test_list_history_defaults_end_to_now_when_only_start_is_given() -> None:
+    depot = FakeRepository([])
+    service = ReadingService(readings=depot)
+    debut = datetime.now(UTC) - timedelta(hours=1)
+    avant = datetime.now(UTC)
+
+    await service.list_history(start=debut, limit=500, offset=0)
+
+    apres = datetime.now(UTC)
+    _, debut_transmis, fin, _, _ = depot.appels[0]
+    assert debut_transmis == debut
+    assert avant <= fin <= apres
+
+
+async def test_list_history_defaults_start_to_24_hours_before_end_when_only_end_is_given() -> None:
+    depot = FakeRepository([])
+    service = ReadingService(readings=depot)
+    fin = datetime(2026, 9, 16, tzinfo=UTC)
+
+    await service.list_history(end=fin, limit=500, offset=0)
+
+    _, debut, fin_transmise, _, _ = depot.appels[0]
+    assert fin_transmise == fin
+    assert debut == fin - FENETRE_PAR_DEFAUT
+
+
+async def test_list_history_normalizes_naive_datetimes_to_utc() -> None:
+    depot = FakeRepository([])
+    service = ReadingService(readings=depot)
+
+    await service.list_history(
+        start=datetime(2026, 9, 1), end=datetime(2026, 9, 2), limit=500, offset=0
+    )
+
+    _, debut, fin, _, _ = depot.appels[0]
+    assert debut == datetime(2026, 9, 1, tzinfo=UTC)
+    assert fin == datetime(2026, 9, 2, tzinfo=UTC)
+
+
+async def test_list_history_raises_when_start_is_after_end() -> None:
+    service = ReadingService(readings=FakeRepository([]))
+
+    with pytest.raises(FenetreInverseeError):
+        await service.list_history(
+            start=datetime(2026, 9, 2, tzinfo=UTC),
+            end=datetime(2026, 9, 1, tzinfo=UTC),
+            limit=500,
+            offset=0,
+        )
+
+
+async def test_list_history_raises_when_start_equals_end() -> None:
+    service = ReadingService(readings=FakeRepository([]))
+    instant = datetime(2026, 9, 1, tzinfo=UTC)
+
+    with pytest.raises(FenetreInverseeError):
+        await service.list_history(start=instant, end=instant, limit=500, offset=0)
+
+
+async def test_list_history_raises_when_the_window_exceeds_the_maximum_span() -> None:
+    service = ReadingService(readings=FakeRepository([]))
+    debut = datetime(2026, 1, 1, tzinfo=UTC)
+    fin = debut + FENETRE_MAXIMALE + timedelta(seconds=1)
+
+    with pytest.raises(FenetreTropLargeError):
+        await service.list_history(start=debut, end=fin, limit=500, offset=0)
+
+
+async def test_list_history_accepts_a_window_exactly_at_the_maximum_span() -> None:
+    depot = FakeRepository([])
+    service = ReadingService(readings=depot)
+    debut = datetime(2026, 1, 1, tzinfo=UTC)
+    fin = debut + FENETRE_MAXIMALE
+
+    await service.list_history(start=debut, end=fin, limit=500, offset=0)
+
+    assert depot.appels == [(None, debut, fin, 500, 0)]

apps/backend/tests/services/test_recommendation.py

@@ -0,0 +1,55 @@
+from datetime import UTC, datetime
+
+import pytest
+
+from app.models.energy import Recommendation
+from app.services.recommendation import RecommendationNotFoundError, RecommendationService
+
+
+def recommendation(recommendation_id: int = 1) -> Recommendation:
+    return Recommendation(
+        recommendation_id=recommendation_id,
+        alert_id=1,
+        action="Vérifier la consommation",
+        explanation="Pic détecté",
+        rule_reference="spike-v1",
+        created_at=datetime(2024, 1, 1, tzinfo=UTC),
+    )
+
+
+class FakeRepository:
+    def __init__(self, recommendations: list[Recommendation]) -> None:
+        self._recommendations = recommendations
+
+    async def list_all(self) -> list[Recommendation]:
+        return self._recommendations
+
+    async def get_by_id(self, recommendation_id: int) -> Recommendation | None:
+        return next(
+            (r for r in self._recommendations if r.recommendation_id == recommendation_id), None
+        )
+
+
+async def test_list_all_returns_the_repository_recommendations() -> None:
+    service = RecommendationService(
+        recommendations=FakeRepository([recommendation(1), recommendation(2)])
+    )
+
+    recommendations = await service.list_all()
+
+    assert [r.recommendation_id for r in recommendations] == [1, 2]
+
+
+async def test_get_by_id_returns_the_matching_recommendation() -> None:
+    service = RecommendationService(recommendations=FakeRepository([recommendation(1)]))
+
+    trouve = await service.get_by_id(1)
+
+    assert trouve.recommendation_id == 1
+
+
+async def test_get_by_id_raises_when_the_recommendation_is_unknown() -> None:
+    service = RecommendationService(recommendations=FakeRepository([]))
+
+    with pytest.raises(RecommendationNotFoundError):
+        await service.get_by_id(404)

apps/backend/tests/services/test_sensor.py

@@ -0,0 +1,224 @@
+from dataclasses import dataclass, field
+from datetime import UTC, datetime
+
+from app.services.sensor import SensorService
+
+TIMESTAMP = datetime(2026, 9, 16, 12, 0, tzinfo=UTC)
+
+
+@dataclass
+class FauxSite:
+    site_id: str
+    site_name: str
+
+
+@dataclass
+class FauxLecture:
+    site_id: str
+    timestamp: datetime
+    data_quality: str | None
+    null_reasons: list[str] | None = field(default_factory=list)
+    consumption_kw: float | None = 10.0
+    voltage_v: float | None = 230.0
+    current_a: float | None = 5.0
+    power_factor: float | None = 0.95
+    temperature_celsius: float | None = 21.0
+    humidity_percent: float | None = 40.0
+
+
+class FauxDepotSites:
+    def __init__(self, sites: list[FauxSite]) -> None:
+        self._sites = sites
+
+    async def list_all(self) -> list[FauxSite]:
+        return self._sites
+
+
+class FauxDepotLectures:
+    def __init__(self, lectures: list[FauxLecture]) -> None:
+        self._lectures = lectures
+
+    async def latest_by_site(self) -> list[FauxLecture]:
+        return self._lectures
+
+
+async def test_status_marks_a_site_without_any_reading_as_critical_with_every_sensor_failing() -> (
+    None
+):
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures([]),  # type: ignore[arg-type]
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.overall == "critical"
+    for capteur in (
+        site.sensors.consumption,
+        site.sensors.electrical,
+        site.sensors.temperature,
+        site.sensors.humidity,
+        site.sensors.network,
+    ):
+        assert capteur.status == "failing"
+        assert capteur.since is None
+
+
+async def test_status_marks_every_sensor_ok_on_a_good_quality_reading_with_no_null_field() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures([FauxLecture("A", TIMESTAMP, "good")]),  # type: ignore[arg-type]
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.overall == "ok"
+    for capteur in (
+        site.sensors.consumption,
+        site.sensors.electrical,
+        site.sensors.temperature,
+        site.sensors.humidity,
+        site.sensors.network,
+    ):
+        assert capteur.status == "ok"
+        assert capteur.since is None
+
+
+async def test_status_flags_the_sensor_named_in_null_reasons() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures(  # type: ignore[arg-type]
+            [
+                FauxLecture(
+                    "A",
+                    TIMESTAMP,
+                    "partial",
+                    null_reasons=["temperature_sensor_failure"],
+                    temperature_celsius=None,
+                )
+            ]
+        ),
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.overall == "degraded"
+    assert site.sensors.temperature.status == "failing"
+    assert site.sensors.temperature.since == TIMESTAMP
+    assert site.sensors.consumption.status == "ok"
+    assert site.sensors.electrical.status == "ok"
+    assert site.sensors.humidity.status == "ok"
+    assert site.sensors.network.status == "ok"
+
+
+async def test_status_flags_a_sensor_from_a_null_field_even_without_a_null_reason() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures(  # type: ignore[arg-type]
+            [FauxLecture("A", TIMESTAMP, "partial", null_reasons=[], humidity_percent=None)]
+        ),
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.sensors.humidity.status == "failing"
+    assert site.sensors.humidity.since == TIMESTAMP
+
+
+async def test_status_flags_electrical_as_failing_when_any_of_its_three_fields_is_null() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures(  # type: ignore[arg-type]
+            [FauxLecture("A", TIMESTAMP, "partial", null_reasons=[], power_factor=None)]
+        ),
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.sensors.electrical.status == "failing"
+
+
+async def test_status_forces_every_sensor_to_failing_when_overall_is_critical() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures([FauxLecture("A", TIMESTAMP, "critical", null_reasons=[])]),  # type: ignore[arg-type]
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.overall == "critical"
+    for capteur in (
+        site.sensors.consumption,
+        site.sensors.electrical,
+        site.sensors.temperature,
+        site.sensors.humidity,
+        site.sensors.network,
+    ):
+        assert capteur.status == "failing"
+        assert capteur.since == TIMESTAMP
+
+
+async def test_status_treats_an_unknown_data_quality_as_critical() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures([FauxLecture("A", TIMESTAMP, None, null_reasons=[])]),  # type: ignore[arg-type]
+    )
+
+    etat = await service.status()
+
+    assert etat.sites[0].overall == "critical"
+
+
+async def test_status_ignores_an_unknown_null_reason() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures(  # type: ignore[arg-type]
+            [FauxLecture("A", TIMESTAMP, "good", null_reasons=["something_else"])]
+        ),
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.overall == "ok"
+    for capteur in (
+        site.sensors.consumption,
+        site.sensors.electrical,
+        site.sensors.temperature,
+        site.sensors.humidity,
+        site.sensors.network,
+    ):
+        assert capteur.status == "ok"
+
+
+async def test_status_flags_network_from_null_reasons_only() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures(  # type: ignore[arg-type]
+            [
+                FauxLecture(
+                    "A",
+                    TIMESTAMP,
+                    "partial",
+                    null_reasons=["network_loss"],
+                )
+            ]
+        ),
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.overall == "degraded"
+    assert site.sensors.network.status == "failing"
+    assert site.sensors.network.since == TIMESTAMP
+    assert site.sensors.consumption.status == "ok"
+    assert site.sensors.electrical.status == "ok"
+    assert site.sensors.temperature.status == "ok"
+    assert site.sensors.humidity.status == "ok"

apps/backend/tests/services/test_site.py

@@ -0,0 +1,122 @@
+from dataclasses import dataclass, field
+from datetime import UTC, datetime
+
+import pytest
+
+from app.models.energy import Site
+from app.services.site import SiteNotFoundError, SiteService
+
+TIMESTAMP = datetime(2026, 9, 16, 12, 0, tzinfo=UTC)
+
+
+def site(site_id: str = "site-1") -> Site:
+    return Site(
+        site_id=site_id,
+        site_name="Site de test",
+        site_type="industriel",
+        location="Toulouse",
+        capacity_kw=42.0,
+        status="actif",
+    )
+
+
+@dataclass
+class FauxLecture:
+    site_id: str
+    timestamp: datetime = TIMESTAMP
+    consumption_kw: float | None = 87.34
+    consumption_kwh: float | None = 87.34
+    voltage_v: float | None = 401.2
+    current_a: float | None = 132.5
+    power_factor: float | None = 0.923
+    temperature_celsius: float | None = 22.1
+    humidity_percent: float | None = 58.4
+    null_reasons: list[str] | None = field(default_factory=list)
+    data_quality: str | None = "good"
+
+
+class FakeRepository:
+    def __init__(self, sites: list[Site]) -> None:
+        self._sites = sites
+
+    async def list_all(self) -> list[Site]:
+        return self._sites
+
+    async def get_by_id(self, site_id: str) -> Site | None:
+        return next((s for s in self._sites if s.site_id == site_id), None)
+
+
+class FauxDepotLectures:
+    def __init__(self, lectures: dict[str, FauxLecture]) -> None:
+        self._lectures = lectures
+
+    async def latest_for_site(self, site_id: str) -> FauxLecture | None:
+        return self._lectures.get(site_id)
+
+
+def service(sites: list[Site], lectures: dict[str, FauxLecture] | None = None) -> SiteService:
+    return SiteService(
+        sites=FakeRepository(sites),  # type: ignore[arg-type]
+        readings=FauxDepotLectures(lectures or {}),  # type: ignore[arg-type]
+    )
+
+
+async def test_list_all_returns_the_repository_sites() -> None:
+    svc = service([site("a"), site("b")])
+
+    sites = await svc.list_all()
+
+    assert [s.site_id for s in sites] == ["a", "b"]
+
+
+async def test_get_by_id_returns_the_matching_site() -> None:
+    svc = service([site("a")])
+
+    trouve = await svc.get_by_id("a")
+
+    assert trouve.site_id == "a"
+
+
+async def test_get_by_id_raises_when_the_site_is_unknown() -> None:
+    svc = service([])
+
+    with pytest.raises(SiteNotFoundError):
+        await svc.get_by_id("inconnu")
+
+
+async def test_current_raises_when_the_site_is_unknown() -> None:
+    svc = service([])
+
+    with pytest.raises(SiteNotFoundError):
+        await svc.current("inconnu")
+
+
+async def test_current_returns_every_field_as_null_when_the_site_has_no_reading() -> None:
+    svc = service([site("a")])
+
+    actuel = await svc.current("a")
+
+    assert actuel.timestamp is None
+    assert actuel.consumption_kw is None
+    assert actuel.data_quality == "critical"
+    assert actuel.null_reasons == []
+
+
+async def test_current_copies_every_field_from_the_latest_reading() -> None:
+    svc = service([site("a")], {"a": FauxLecture(site_id="a")})
+
+    actuel = await svc.current("a")
+
+    assert actuel.timestamp == TIMESTAMP
+    assert actuel.site_type == "industriel"
+    assert actuel.consumption_kw == 87.34
+    assert actuel.voltage_v == 401.2
+    assert actuel.data_quality == "good"
+
+
+async def test_current_treats_an_unknown_data_quality_as_critical() -> None:
+    svc = service([site("a")], {"a": FauxLecture(site_id="a", data_quality=None)})
+
+    actuel = await svc.current("a")
+
+    assert actuel.data_quality == "critical"

apps/backend/tests/services/test_stats.py

@@ -0,0 +1,107 @@
+from dataclasses import dataclass
+
+from app.services.stats import StatsService
+
+
+@dataclass
+class FauxSite:
+    site_id: str
+    site_name: str
+    capacity_kw: float | None
+
+
+@dataclass
+class FauxLecture:
+    site_id: str
+    consumption_kw: float | None
+    data_quality: str | None
+
+
+class FauxDepotSites:
+    def __init__(self, sites: list[FauxSite]) -> None:
+        self._sites = sites
+
+    async def list_all(self) -> list[FauxSite]:
+        return self._sites
+
+
+class FauxDepotLectures:
+    def __init__(self, lectures: list[FauxLecture]) -> None:
+        self._lectures = lectures
+
+    async def latest_by_site(self) -> list[FauxLecture]:
+        return self._lectures
+
+
+async def test_summary_computes_totals_and_the_average_load() -> None:
+    service = StatsService(
+        sites=FauxDepotSites([FauxSite("A", "Site A", 200), FauxSite("B", "Site B", 800)]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures(  # type: ignore[arg-type]
+            [
+                FauxLecture("A", 100, "good"),
+                FauxLecture("B", 400, "good"),
+            ]
+        ),
+    )
+
+    resume = await service.summary()
+
+    assert resume.total_sites == 2
+    assert resume.total_consumption_kw == 500
+    assert resume.total_capacity_kw == 1000
+    assert resume.average_load_percent == 50
+    par_site = {site.site_id: site for site in resume.sites}
+    assert par_site["A"].load_percent == 50
+    assert par_site["B"].load_percent == 50
+
+
+async def test_summary_treats_a_site_without_any_reading_as_critical() -> None:
+    service = StatsService(
+        sites=FauxDepotSites([FauxSite("A", "Site A", 200)]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures([]),  # type: ignore[arg-type]
+    )
+
+    resume = await service.summary()
+
+    site = resume.sites[0]
+    assert site.data_quality == "critical"
+    assert site.current_consumption_kw is None
+    assert site.load_percent is None
+
+
+async def test_summary_treats_a_reading_with_an_unknown_quality_as_critical() -> None:
+    service = StatsService(
+        sites=FauxDepotSites([FauxSite("A", "Site A", 200)]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures([FauxLecture("A", 50, None)]),  # type: ignore[arg-type]
+    )
+
+    resume = await service.summary()
+
+    site = resume.sites[0]
+    assert site.data_quality == "critical"
+    assert site.current_consumption_kw is None
+
+
+async def test_summary_exposes_a_missing_capacity_as_zero_without_dividing_by_it() -> None:
+    service = StatsService(
+        sites=FauxDepotSites([FauxSite("A", "Site A", None)]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures([FauxLecture("A", 50, "good")]),  # type: ignore[arg-type]
+    )
+
+    resume = await service.summary()
+
+    site = resume.sites[0]
+    assert site.capacity_kw == 0
+    assert site.current_consumption_kw == 50
+    assert site.load_percent is None
+
+
+async def test_summary_returns_zero_average_load_when_no_site_has_a_capacity() -> None:
+    service = StatsService(
+        sites=FauxDepotSites([FauxSite("A", "Site A", None)]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures([]),  # type: ignore[arg-type]
+    )
+
+    resume = await service.summary()
+
+    assert resume.average_load_percent == 0

apps/backend/tests/test_cli.py

@@ -1,3 +1,6 @@
+import json
+from pathlib import Path
+
 import pytest
 
 from app import cli
@@ -55,3 +58,52 @@ def test_read_password_refuses_two_different_entries(monkeypatch: pytest.MonkeyP
 
     with pytest.raises(SystemExit):
         cli.read_password(generate=False)
+
+
+def test_build_parser_reads_the_export_openapi_arguments() -> None:
+    arguments = cli.build_parser().parse_args(
+        ["export-openapi", "--output", "ailleurs/contrat.json"]
+    )
+
+    assert arguments.commande == "export-openapi"
+    assert arguments.output == "ailleurs/contrat.json"
+
+
+def test_build_parser_defaults_the_export_to_the_versioned_contract() -> None:
+    arguments = cli.build_parser().parse_args(["export-openapi"])
+
+    assert arguments.output == str(cli.CHEMIN_CONTRAT)
+
+
+def test_settings_of_the_contract_ignore_the_local_environment(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    monkeypatch.setenv("APP_API_PREFIX", "/api/v9")
+    monkeypatch.setenv("APP_NAME", "API du poste de Johan")
+
+    settings = cli.settings_du_contrat()
+
+    assert settings.api_prefix == "/api/v1"
+    assert settings.name == "EnerVision API"
+
+
+def test_export_openapi_writes_a_readable_schema_where_asked(tmp_path: Path) -> None:
+    destination = tmp_path / "contrat.json"
+
+    cli.export_openapi(destination)
+
+    assert json.loads(destination.read_text(encoding="utf-8"))["openapi"].startswith("3.")
+
+
+# Piège : `main()` réclamait un mot de passe avant de lire la commande. Sans le branchement,
+# l'export resterait bloqué sur `getpass` et aucune CI ne pourrait le rejouer.
+def test_main_exports_the_contract_without_asking_for_a_password(
+    tmp_path: Path, capsys: pytest.CaptureFixture[str]
+) -> None:
+    destination = tmp_path / "contrat.json"
+
+    code = cli.main(["export-openapi", "--output", str(destination)])
+
+    assert code == 0
+    assert destination.exists()
+    assert str(destination) in capsys.readouterr().out

apps/backend/uv.lock

@@ -1,6 +1,11 @@
 version = 1
 revision = 3
 requires-python = "==3.14.*"
+resolution-markers = [
+    "sys_platform == 'win32'",
+    "sys_platform == 'emscripten'",
+    "sys_platform != 'emscripten' and sys_platform != 'win32'",
+]
 
 [[package]]
 name = "alembic"
@@ -311,6 +316,7 @@ dependencies = [
     { name = "argon2-cffi" },
     { name = "asyncpg" },
     { name = "fastapi" },
+    { name = "pandas" },
     { name = "prometheus-fastapi-instrumentator" },
     { name = "pydantic", extra = ["email"] },
     { name = "pydantic-settings" },
@@ -324,6 +330,7 @@ dependencies = [
 dev = [
     { name = "httpx" },
     { name = "mypy" },
+    { name = "pandas-stubs" },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-cov" },
@@ -337,6 +344,7 @@ requires-dist = [
     { name = "argon2-cffi", specifier = ">=23.1" },
     { name = "asyncpg", specifier = ">=0.31.0" },
     { name = "fastapi", specifier = ">=0.141.1" },
+    { name = "pandas", specifier = ">=3.0.5" },
     { name = "prometheus-fastapi-instrumentator", specifier = ">=8.1.0" },
     { name = "pydantic", extras = ["email"], specifier = ">=2.13.5" },
     { name = "pydantic-settings", specifier = ">=2.15.0" },
@@ -350,6 +358,7 @@ requires-dist = [
 dev = [
     { name = "httpx", specifier = ">=0.28.1" },
     { name = "mypy", specifier = ">=2.3.1" },
+    { name = "pandas-stubs", specifier = ">=3.0.5.260914" },
     { name = "pytest", specifier = ">=9.1.1" },
     { name = "pytest-asyncio", specifier = ">=1.4.0" },
     { name = "pytest-cov", specifier = ">=7.1.0" },
@@ -595,6 +604,35 @@ wheels = [
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 ]
 
+[[package]]
+name = "numpy"
+version = "2.5.3"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/13/01/11703282db468b85f6f7b8c7f22d058de5970d5c7e60a3a8aaa313c3de36/numpy-2.5.3.tar.gz", hash = "sha256:df2d5874ff183595a4ba404edd04f6bd9b5505c1d7708573f6a6c17489a67563", size = 20791231, upload-time = "2026-09-06T16:27:47.073Z" }
+wheels = [
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+    { url = "https://files.pythonhosted.org/packages/9e/59/abcc2d8def4fd60eec7d87f92d27c13448ffd9ab14339bcc63a0d7a2fdea/numpy-2.5.3-cp314-cp314-macosx_11_0_arm64.whl", hash = "sha256:012e66aca395d795496446e52aeeb5866312a5d4d3f27da270e5a0b43f70dc5c", size = 12013862, upload-time = "2026-09-06T16:25:36.748Z" },
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+version = "3.0.5.260914"
+source = { registry = "https://pypi.org/simple" }
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+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "six" },
+]
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+[[package]]
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+version = "2026.4"
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+
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apps/frontend/.gitignore

@@ -34,6 +34,7 @@ yarn-error.log
 .sass-cache/
 /connect.lock
 /coverage
+/test-results
 /libpeerconnection.log
 testem.log
 /typings

apps/frontend/Dockerfile

@@ -0,0 +1,47 @@
+# ==================
+# Étape 1 : Build
+# ==================
+
+# Image pour frontend
+FROM node:24-alpine3.22 AS builder
+
+WORKDIR /app
+
+COPY package.json package-lock.json* ./
+
+# Installation des dépendances du projet avec npm
+RUN  npm ci
+
+# Copie du code source vers le conteneur
+COPY . .
+
+# Build 
+RUN npm run build
+
+# ==================
+# Étape 2 : Runner
+# ==================
+
+
+FROM dhi.io/nginx:1.28.0-alpine3.21-dev AS runner
+
+# Copie de la configuration de nginx
+COPY --chown=root:root --chmod=755 nginx.conf /etc/nginx/nginx.conf
+
+# Copy the static build output from the build stage to Nginx's default HTML serving directory
+COPY --chown=root:root --chmod=755 --from=builder /app/dist/*/browser /usr/share/nginx/html
+
+# Create necessary directories with proper permissions for nginx
+RUN mkdir -p /var/log/nginx /var/cache/nginx && \
+    chown -R nginx:nginx /var/log/nginx /var/cache/nginx /usr/share/nginx/html
+
+# Use a non-root user for security best practices
+USER nginx
+
+# Frontend : port 3000
+# Backend : port 8000
+EXPOSE 3000
+
+# Start Nginx directly with custom config
+ENTRYPOINT ["nginx", "-c", "/etc/nginx/nginx.conf"]
+CMD ["-g", "daemon off;"]

apps/frontend/angular.json

@@ -2,7 +2,8 @@
   "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
   "version": 1,
   "cli": {
-    "packageManager": "npm"
+    "packageManager": "npm",
+    "analytics": false
   },
   "newProjectRoot": "projects",
   "projects": {
@@ -80,6 +81,7 @@
           "builder": "@angular/build:unit-test",
           "options": {
             "coverage": true,
+            "isolate": true,
             "coverageReporters": [
               "text-summary",
               "lcov",

apps/frontend/nginx.conf

@@ -0,0 +1,32 @@
+worker_processes auto;
+error_log /var/log/nginx/error.log warn;
+pid /tmp/nginx.pid;
+
+events {
+    worker_connections 1024;
+}
+
+http {
+    include /etc/nginx/mime.types;
+    default_type application/octet-stream;
+
+    sendfile on;
+    keepalive_timeout 65;
+
+
+    server {
+        listen 3000;
+        server_name _;
+
+        root /usr/share/nginx/html;
+        index index.html;
+
+        location / {
+            try_files $uri $uri/ /index.html;
+        }
+
+        location ~ /\. {
+            deny all;
+        }
+    }
+}

apps/frontend/package-lock.json

@@ -14,6 +14,7 @@
         "@angular/forms": "^22.1.0",
         "@angular/platform-browser": "^22.1.0",
         "@angular/router": "^22.1.0",
+        "chart.js": "^4.5.1",
         "rxjs": "~7.8.0",
         "tslib": "^2.3.0"
       },
@@ -2038,6 +2039,12 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
+    "node_modules/@kurkle/color": {
+      "version": "0.3.4",
+      "resolved": "https://registry.npmjs.org/@kurkle/color/-/color-0.3.4.tgz",
+      "integrity": "sha512-M5UknZPHRu3DEDWoipU6sE8PdkZ6Z/S+v4dD+Ke8IaNlpdSQah50lz1KtcFBa2vsdOnwbbnxJwVM4wty6udA5w==",
+      "license": "MIT"
+    },
     "node_modules/@listr2/prompt-adapter-inquirer": {
       "version": "4.2.5",
       "resolved": "https://registry.npmjs.org/@listr2/prompt-adapter-inquirer/-/prompt-adapter-inquirer-4.2.5.tgz",
@@ -4220,6 +4227,18 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/chart.js": {
+      "version": "4.5.1",
+      "resolved": "https://registry.npmjs.org/chart.js/-/chart.js-4.5.1.tgz",
+      "integrity": "sha512-GIjfiT9dbmHRiYi6Nl2yFCq7kkwdkp1W/lp2J99rX0yo9tgJGn3lKQATztIjb5tVtevcBtIdICNWqlq5+E8/Pw==",
+      "license": "MIT",
+      "dependencies": {
+        "@kurkle/color": "^0.3.0"
+      },
+      "engines": {
+        "pnpm": ">=8"
+      }
+    },
     "node_modules/chokidar": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-5.0.0.tgz",

apps/frontend/package.json

@@ -18,6 +18,7 @@
     "@angular/forms": "^22.1.0",
     "@angular/platform-browser": "^22.1.0",
     "@angular/router": "^22.1.0",
+    "chart.js": "^4.5.1",
     "rxjs": "~7.8.0",
     "tslib": "^2.3.0"
   },

apps/frontend/src/app/app.config.ts

@@ -1,7 +1,21 @@
-import { ApplicationConfig, provideBrowserGlobalErrorListeners } from '@angular/core';
+import {ApplicationConfig, inject, provideAppInitializer, provideBrowserGlobalErrorListeners} from '@angular/core';
 import { provideRouter } from '@angular/router';
 import { routes } from './app.routes';
+import { mockApiInterceptor } from './core/interceptors/mock-api-interceptor';
+import { provideHttpClient, withInterceptors } from '@angular/common/http';
+import {catchError, firstValueFrom, of} from 'rxjs';
+import {AuthService} from './core/services/auth.service';
+import {authInterceptor} from './core/interceptors/auth-interceptor';
 
 export const appConfig: ApplicationConfig = {
-  providers: [provideBrowserGlobalErrorListeners(), provideRouter(routes)],
+  providers: [
+    provideBrowserGlobalErrorListeners(),
+    provideRouter(routes),
+    provideHttpClient(withInterceptors([authInterceptor, mockApiInterceptor])),
+    provideAppInitializer(() => {
+      const auth = inject(AuthService);
+      // Un 401 ici est normal : ça veut juste dire qu'il n'y a pas de session.
+      return firstValueFrom(auth.refreshShared().pipe(catchError(() => of(null))));
+    }),
+  ],
 };

apps/frontend/src/app/app.html

@@ -1,353 +1 @@
-<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
+<router-outlet></router-outlet>
-<!-- * * * * * * * * * * * The content below * * * * * * * * * * * -->
-<!-- * * * * * * * * * * is only a placeholder * * * * * * * * * * -->
-<!-- * * * * * * * * * * and can be replaced.  * * * * * * * * * * -->
-<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
-<!-- * * * * * * * * * Delete the template below * * * * * * * * * -->
-<!-- * * * * * * * to get started with your project! * * * * * * * -->
-<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
-
-<style>
-  :host {
-    --bright-blue: oklch(51.01% 0.274 263.83);
-    --electric-violet: oklch(53.18% 0.28 296.97);
-    --french-violet: oklch(47.66% 0.246 305.88);
-    --vivid-pink: oklch(69.02% 0.277 332.77);
-    --hot-red: oklch(61.42% 0.238 15.34);
-    --orange-red: oklch(63.32% 0.24 31.68);
-
-    --gray-900: oklch(19.37% 0.006 300.98);
-    --gray-700: oklch(36.98% 0.014 302.71);
-    --gray-400: oklch(70.9% 0.015 304.04);
-
-    --red-to-pink-to-purple-vertical-gradient: linear-gradient(
-      180deg,
-      var(--orange-red) 0%,
-      var(--vivid-pink) 50%,
-      var(--electric-violet) 100%
-    );
-
-    --red-to-pink-to-purple-horizontal-gradient: linear-gradient(
-      90deg,
-      var(--orange-red) 0%,
-      var(--vivid-pink) 50%,
-      var(--electric-violet) 100%
-    );
-
-    --pill-accent: var(--bright-blue);
-
-    font-family:
-      'Inter',
-      -apple-system,
-      BlinkMacSystemFont,
-      'Segoe UI',
-      Roboto,
-      Helvetica,
-      Arial,
-      sans-serif,
-      'Apple Color Emoji',
-      'Segoe UI Emoji',
-      'Segoe UI Symbol';
-    box-sizing: border-box;
-    -webkit-font-smoothing: antialiased;
-    -moz-osx-font-smoothing: grayscale;
-    display: block;
-    height: 100dvh;
-  }
-
-  h1 {
-    font-size: 3.125rem;
-    color: var(--gray-900);
-    font-weight: 500;
-    line-height: 100%;
-    letter-spacing: -0.125rem;
-    margin: 0;
-    font-family:
-      'Inter Tight',
-      -apple-system,
-      BlinkMacSystemFont,
-      'Segoe UI',
-      Roboto,
-      Helvetica,
-      Arial,
-      sans-serif,
-      'Apple Color Emoji',
-      'Segoe UI Emoji',
-      'Segoe UI Symbol';
-  }
-
-  p {
-    margin: 0;
-    color: var(--gray-700);
-  }
-
-  main {
-    width: 100%;
-    min-height: 100%;
-    display: flex;
-    justify-content: center;
-    align-items: center;
-    padding: 1rem;
-    box-sizing: inherit;
-    position: relative;
-  }
-
-  .angular-logo {
-    max-width: 9.2rem;
-  }
-
-  .content {
-    display: flex;
-    justify-content: space-around;
-    width: 100%;
-    max-width: 700px;
-    margin-bottom: 3rem;
-  }
-
-  .content h1 {
-    margin-top: 1.75rem;
-  }
-
-  .content p {
-    margin-top: 1.5rem;
-  }
-
-  .divider {
-    width: 1px;
-    background: var(--red-to-pink-to-purple-vertical-gradient);
-    margin-inline: 0.5rem;
-  }
-
-  .pill-group {
-    display: flex;
-    flex-direction: column;
-    align-items: start;
-    flex-wrap: wrap;
-    gap: 1.25rem;
-  }
-
-  .pill {
-    display: flex;
-    align-items: center;
-    --pill-accent: var(--bright-blue);
-    background: color-mix(in srgb, var(--pill-accent) 5%, transparent);
-    color: var(--pill-accent);
-    padding-inline: 0.75rem;
-    padding-block: 0.375rem;
-    border-radius: 2.75rem;
-    border: 0;
-    transition: background 0.3s ease;
-    font-family: var(--inter-font);
-    font-size: 0.875rem;
-    font-style: normal;
-    font-weight: 500;
-    line-height: 1.4rem;
-    letter-spacing: -0.00875rem;
-    text-decoration: none;
-    white-space: nowrap;
-  }
-
-  .pill:hover {
-    background: color-mix(in srgb, var(--pill-accent) 15%, transparent);
-  }
-
-  .pill-group .pill:nth-child(6n + 1) {
-    --pill-accent: var(--bright-blue);
-  }
-  .pill-group .pill:nth-child(6n + 2) {
-    --pill-accent: var(--electric-violet);
-  }
-  .pill-group .pill:nth-child(6n + 3) {
-    --pill-accent: var(--french-violet);
-  }
-
-  .pill-group .pill:nth-child(6n + 4),
-  .pill-group .pill:nth-child(6n + 5),
-  .pill-group .pill:nth-child(6n + 6) {
-    --pill-accent: var(--hot-red);
-  }
-
-  .pill-group svg {
-    margin-inline-start: 0.25rem;
-  }
-
-  .social-links {
-    display: flex;
-    align-items: center;
-    gap: 0.73rem;
-    margin-top: 1.5rem;
-  }
-
-  .social-links path {
-    transition: fill 0.3s ease;
-    fill: var(--gray-400);
-  }
-
-  .social-links a:hover svg path {
-    fill: var(--gray-900);
-  }
-
-  @media screen and (max-width: 650px) {
-    .content {
-      flex-direction: column;
-      width: max-content;
-    }
-
-    .divider {
-      height: 1px;
-      width: 100%;
-      background: var(--red-to-pink-to-purple-horizontal-gradient);
-      margin-block: 1.5rem;
-    }
-  }
-</style>
-
-<main class="main">
-  <div class="content">
-    <div class="left-side">
-      <svg
-        xmlns="http://www.w3.org/2000/svg"
-        viewBox="0 0 982 239"
-        fill="none"
-        class="angular-logo"
-      >
-        <g clip-path="url(#a)">
-          <path
-            fill="url(#b)"
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apps/frontend/src/app/app.routes.ts

@@ -1,3 +1,13 @@
 import { Routes } from '@angular/router';
+import {authGuard} from './core/guards/auth-guard';
 
-export const routes: Routes = [];
+export const routes: Routes = [
+  { path: '', redirectTo: 'dashboard', pathMatch: 'full' },
+  { path: 'login', loadComponent: () => import('./features/auth/login/login').then(m => m.Login) },
+  { path: 'change-password', loadComponent: () => import('./features/auth/change-password/change-password').then(m => m.ChangePassword) },
+  {
+    path: 'dashboard',
+    canActivate: [authGuard],
+    loadComponent: () => import('./features/dashboard/dashboard').then(m => m.Dashboard),
+  },
+];

apps/frontend/src/app/app.spec.ts

@@ -13,11 +13,4 @@ describe('App', () => {
     const app = fixture.componentInstance;
     expect(app).toBeTruthy();
   });
-
-  it('should render title', async () => {
-    const fixture = TestBed.createComponent(App);
-    await fixture.whenStable();
-    const compiled = fixture.nativeElement as HTMLElement;
-    expect(compiled.querySelector('h1')?.textContent).toContain('Hello, frontend');
-  });
 });

apps/frontend/src/app/core/guards/auth-guard.spec.ts

@@ -0,0 +1,67 @@
+import { TestBed } from '@angular/core/testing';
+import { Router, ActivatedRouteSnapshot } from '@angular/router';
+import { vi } from 'vitest';
+import { authGuard } from './auth-guard';
+import { AuthService } from '../services/auth.service';
+
+describe('authGuard', () => {
+  let authMock: { isAuthenticated: ReturnType<typeof vi.fn>; principal: ReturnType<typeof vi.fn> };
+  let routerMock: { navigate: ReturnType<typeof vi.fn> };
+
+  beforeEach(() => {
+    authMock = { isAuthenticated: vi.fn(), principal: vi.fn() };
+    routerMock = { navigate: vi.fn() };
+
+    TestBed.configureTestingModule({
+      providers: [
+        { provide: AuthService, useValue: authMock },
+        { provide: Router, useValue: routerMock },
+      ],
+    });
+  });
+
+  it('redirige vers /login si non authentifié', () => {
+    authMock.isAuthenticated.mockReturnValue(false);
+
+    const result = TestBed.runInInjectionContext(() =>
+      authGuard({ data: {} } as ActivatedRouteSnapshot, {} as any)
+    );
+
+    expect(result).toBe(false);
+    expect(routerMock.navigate).toHaveBeenCalledWith(['/login']);
+  });
+
+  it('redirige vers /login si le rôle ne correspond pas', () => {
+    authMock.isAuthenticated.mockReturnValue(true);
+    authMock.principal.mockReturnValue({ role: 'lecteur' });
+
+    const result = TestBed.runInInjectionContext(() =>
+      authGuard({ data: { role: 'admin' } } as unknown as ActivatedRouteSnapshot, {} as any)
+    );
+
+    expect(result).toBe(false);
+    expect(routerMock.navigate).toHaveBeenCalledWith(['/login']);
+  });
+
+  it('autorise si authentifié et rôle correspondant', () => {
+    authMock.isAuthenticated.mockReturnValue(true);
+    authMock.principal.mockReturnValue({ role: 'admin' });
+
+    const result = TestBed.runInInjectionContext(() =>
+      authGuard({ data: { role: 'admin' } } as unknown as ActivatedRouteSnapshot, {} as any)
+    );
+
+    expect(result).toBe(true);
+  });
+
+  it('autorise si authentifié et aucun rôle requis', () => {
+    authMock.isAuthenticated.mockReturnValue(true);
+    authMock.principal.mockReturnValue({ role: 'lecteur' });
+
+    const result = TestBed.runInInjectionContext(() =>
+      authGuard({ data: {} } as ActivatedRouteSnapshot, {} as any)
+    );
+
+    expect(result).toBe(true);
+  });
+});

apps/frontend/src/app/core/guards/auth-guard.ts

@@ -0,0 +1,21 @@
+import { inject } from '@angular/core';
+import { CanActivateFn, Router } from '@angular/router';
+import { AuthService } from '../services/auth.service';
+
+export const authGuard: CanActivateFn = (route) => {
+  const auth = inject(AuthService);
+  const router = inject(Router);
+
+  if (!auth.isAuthenticated()) {
+    router.navigate(['/login']);
+    return false;
+  }
+
+  const requiredRole = route.data['role'] as string | undefined;
+  if (requiredRole && auth.principal()?.role !== requiredRole) {
+    router.navigate(['/login']);
+    return false;
+  }
+
+  return true;
+};

apps/frontend/src/app/core/interceptors/auth-interceptor.spec.ts

@@ -0,0 +1,161 @@
+import { TestBed } from '@angular/core/testing';
+import {
+  HttpClient,
+  HttpHandlerFn,
+  HttpHeaders,
+  HttpRequest,
+  provideHttpClient,
+  withInterceptors
+} from '@angular/common/http';
+import { provideHttpClientTesting, HttpTestingController } from '@angular/common/http/testing';
+import { Router } from '@angular/router';
+import { of, throwError } from 'rxjs';
+import { vi } from 'vitest';
+import { authInterceptor } from './auth-interceptor';
+import { AuthService } from '../services/auth.service';
+
+describe('authInterceptor', () => {
+  let http: HttpClient;
+  let httpMock: HttpTestingController;
+  let authMock: { getAccessToken: ReturnType<typeof vi.fn>; clearSession: ReturnType<typeof vi.fn>; refreshShared: ReturnType<typeof vi.fn> };
+  let routerMock: { navigate: ReturnType<typeof vi.fn> };
+
+  beforeEach(() => {
+    authMock = {
+      getAccessToken: vi.fn().mockReturnValue('fake-token'),
+      clearSession: vi.fn(),
+      refreshShared: vi.fn(),
+    };
+    routerMock = { navigate: vi.fn() };
+
+    TestBed.configureTestingModule({
+      providers: [
+        provideHttpClient(withInterceptors([authInterceptor])),
+        provideHttpClientTesting(),
+        { provide: AuthService, useValue: authMock },
+        { provide: Router, useValue: routerMock },
+      ],
+    });
+
+    http = TestBed.inject(HttpClient);
+    httpMock = TestBed.inject(HttpTestingController);
+  });
+
+  afterEach(() => httpMock.verify());
+
+  it('ajoute le header Authorization quand un token est disponible', () => {
+    http.get('/api/v1/stats/summary').subscribe();
+    const req = httpMock.expectOne('/api/v1/stats/summary');
+    expect(req.request.headers.get('Authorization')).toBe('Bearer fake-token');
+    req.flush({});
+  });
+
+  it("n'ajoute pas le header Authorization sur /auth/login", () => {
+    http.post('/api/v1/auth/login', {}).subscribe();
+    const req = httpMock.expectOne('/api/v1/auth/login');
+    expect(req.request.headers.has('Authorization')).toBe(false);
+    req.flush({});
+  });
+
+  it('ajoute withCredentials sur les routes /auth/*', () => {
+    http.post('/api/v1/auth/login', {}).subscribe();
+    const req = httpMock.expectOne('/api/v1/auth/login');
+    expect(req.request.withCredentials).toBe(true);
+    req.flush({});
+  });
+
+  it('redirige vers /change-password sur un 403 avec ce detail précis', () => {
+    http.get('/api/v1/dashboard').subscribe({ error: () => {} });
+    const req = httpMock.expectOne('/api/v1/dashboard');
+    req.flush({ detail: 'password_change_required' }, { status: 403, statusText: 'Forbidden' });
+    expect(routerMock.navigate).toHaveBeenCalledWith(['/change-password']);
+  });
+
+  it('ne redirige pas sur un 403 avec un autre detail', () => {
+    http.get('/api/v1/dashboard').subscribe({ error: () => {} });
+    const req = httpMock.expectOne('/api/v1/dashboard');
+    req.flush({ detail: 'Droits insuffisants' }, { status: 403, statusText: 'Forbidden' });
+    expect(routerMock.navigate).not.toHaveBeenCalled();
+  });
+
+  it('déconnecte et redirige vers /login sur un 401 avec error="invalid_token"', () => {
+    http.get('/api/v1/dashboard').subscribe({ error: () => {} });
+    const req = httpMock.expectOne('/api/v1/dashboard');
+    req.flush(
+      {},
+      { status: 401, statusText: 'Unauthorized', headers: new HttpHeaders({ 'WWW-Authenticate': 'Bearer error="invalid_token"' }) }
+    );
+    expect(authMock.clearSession).toHaveBeenCalled();
+    expect(routerMock.navigate).toHaveBeenCalledWith(['/login']);
+  });
+
+  it('déconnecte directement sur un 401 provenant de /auth/refresh, sans tenter de rafraîchir', () => {
+    http.post('/api/v1/auth/refresh', {}).subscribe({ error: () => {} });
+    const req = httpMock.expectOne('/api/v1/auth/refresh');
+    req.flush({}, { status: 401, statusText: 'Unauthorized' });
+    expect(authMock.clearSession).toHaveBeenCalled();
+    expect(routerMock.navigate).toHaveBeenCalledWith(['/login']);
+  });
+
+  it('rafraîchit puis rejoue la requête sur un 401 avec error="expired"', () => {
+    authMock.refreshShared.mockReturnValue(of({ access_token: 'new-token' }));
+    authMock.getAccessToken.mockReturnValueOnce('old-token').mockReturnValue('new-token');
+
+    let result: unknown;
+    http.get('/api/v1/dashboard').subscribe((r) => (result = r));
+
+    const firstReq = httpMock.expectOne('/api/v1/dashboard');
+    firstReq.flush({}, { status: 401, statusText: 'Unauthorized', headers: new HttpHeaders({ 'WWW-Authenticate': 'Bearer error="expired"' }) });
+
+    const retriedReq = httpMock.expectOne('/api/v1/dashboard');
+    expect(retriedReq.request.headers.get('Authorization')).toBe('Bearer new-token');
+    retriedReq.flush({ ok: true });
+
+    expect(result).toEqual({ ok: true });
+  });
+
+  it('déconnecte si le rafraîchissement échoue après un 401 "expired"', () => {
+    authMock.refreshShared.mockReturnValue(throwError(() => new Error('refresh failed')));
+
+    http.get('/api/v1/dashboard').subscribe({ error: () => {} });
+    const req = httpMock.expectOne('/api/v1/dashboard');
+    req.flush({}, { status: 401, statusText: 'Unauthorized', headers: new HttpHeaders({ 'WWW-Authenticate': 'Bearer error="expired"' }) });
+
+    expect(authMock.clearSession).toHaveBeenCalled();
+    expect(routerMock.navigate).toHaveBeenCalledWith(['/login']);
+  });
+
+  it("propage l'erreur telle quelle si ce n'est pas une HttpErrorResponse", () => {
+  const req = new HttpRequest('GET', '/api/v1/dashboard');
+  const boom = new Error('erreur inattendue, pas HTTP');
+  const next: HttpHandlerFn = () => throwError(() => boom);
+
+  let captured: unknown;
+  TestBed.runInInjectionContext(() => {
+    authInterceptor(req, next).subscribe({ error: (e) => (captured = e) });
+  });
+
+  expect(captured).toBe(boom);
+});
+
+it('propage un 401 sur /auth/login sans tenter de rafraîchir ni déconnecter', () => {
+  http.post('/api/v1/auth/login', {}).subscribe({ error: () => {} });
+  const req = httpMock.expectOne('/api/v1/auth/login');
+  req.flush({}, { status: 401, statusText: 'Unauthorized' });
+
+  expect(authMock.refreshShared).not.toHaveBeenCalled();
+  expect(authMock.clearSession).not.toHaveBeenCalled();
+});
+
+it("propage un 401 dont le WWW-Authenticate ne correspond à aucun cas connu", () => {
+  http.get('/api/v1/dashboard').subscribe({ error: () => {} });
+  const req = httpMock.expectOne('/api/v1/dashboard');
+  req.flush(
+    {},
+    { status: 401, statusText: 'Unauthorized', headers: new HttpHeaders({ 'WWW-Authenticate': 'Bearer error="unknown_case"' }) }
+  );
+
+  expect(authMock.refreshShared).not.toHaveBeenCalled();
+  expect(authMock.clearSession).not.toHaveBeenCalled();
+});
+});

apps/frontend/src/app/core/interceptors/auth-interceptor.ts

@@ -0,0 +1,77 @@
+import { HttpErrorResponse, HttpInterceptorFn } from '@angular/common/http';
+import { inject } from '@angular/core';
+import { Router } from '@angular/router';
+import { Observable, catchError, switchMap, throwError } from 'rxjs';
+import { AuthService } from '../services/auth.service';
+import { TokenResponse } from '../../shared/models/auth.model';
+
+function parseAuthError(response: HttpErrorResponse): string | null {
+  const header = response.headers?.get('WWW-Authenticate') ?? '';
+  const match = header.match(/error="([^"]+)"/);
+  return match ? match[1] : null;
+}
+
+export const authInterceptor: HttpInterceptorFn = (req, next) => {
+  const auth = inject(AuthService);
+  const router = inject(Router);
+
+  const isAuthRoute = req.url.includes('/auth/');
+  let request = isAuthRoute ? req.clone({ withCredentials: true }) : req;
+
+  const token = auth.getAccessToken();
+  if (token && !req.url.endsWith('/auth/login')) {
+    request = request.clone({ setHeaders: { Authorization: `Bearer ${token}` } });
+  }
+
+  return next(request).pipe(
+    catchError((error: unknown) => {
+      if (!(error instanceof HttpErrorResponse)) {
+        return throwError(() => error);
+      }
+
+      if (error.status === 403) {
+        const detail = (error.error as { detail?: string })?.detail;
+        if (detail === 'password_change_required') {
+          router.navigate(['/change-password']);
+        }
+        return throwError(() => error);
+      }
+
+      if (error.status !== 401 || req.url.endsWith('/auth/login')) {
+        return throwError(() => error);
+      }
+
+      if (req.url.endsWith('/auth/refresh')) {
+        auth.clearSession();
+        router.navigate(['/login']);
+        return throwError(() => error);
+      }
+
+      const kind = parseAuthError(error);
+
+      if (kind === 'invalid_token') {
+        auth.clearSession();
+        router.navigate(['/login']);
+        return throwError(() => error);
+      }
+
+      if (kind === 'expired' || kind === 'token_stale') {
+        return (auth.refreshShared() as Observable<TokenResponse>).pipe(
+          switchMap(() => {
+            const retried = request.clone({
+              setHeaders: { Authorization: `Bearer ${auth.getAccessToken()}` },
+            });
+            return next(retried);
+          }),
+          catchError((refreshError) => {
+            auth.clearSession();
+            router.navigate(['/login']);
+            return throwError(() => refreshError);
+          })
+        );
+      }
+
+      return throwError(() => error);
+    })
+  );
+};

apps/frontend/src/app/core/interceptors/mock-api-interceptor.spec.ts

@@ -0,0 +1,67 @@
+import { TestBed } from '@angular/core/testing';
+import { HttpClient, provideHttpClient, withInterceptors } from '@angular/common/http';
+import { provideHttpClientTesting, HttpTestingController } from '@angular/common/http/testing';
+import { mockApiInterceptor } from './mock-api-interceptor';
+import { environment } from '../../../environments/environment';
+import { STATS_SUMMARY_FIXTURE } from '../mocks/stats-summary.fixture';
+
+describe('mockApiInterceptor', () => {
+  let http: HttpClient;
+  let httpMock: HttpTestingController;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [
+        provideHttpClient(withInterceptors([mockApiInterceptor])),
+        provideHttpClientTesting(),
+      ],
+    });
+    http = TestBed.inject(HttpClient);
+    httpMock = TestBed.inject(HttpTestingController);
+  });
+
+  afterEach(() => {
+    environment.useMockFixtures = true;
+    httpMock.verify();
+  });
+
+  it('renvoie la fixture sans appel réseau quand useMockFixtures est activé', () => {
+    environment.useMockFixtures = true;
+    let result: unknown;
+
+    http.get(`${environment.apiUrl}/stats/summary`).subscribe((r) => (result = r));
+
+    httpMock.expectNone(`${environment.apiUrl}/stats/summary`);
+    expect((result as typeof STATS_SUMMARY_FIXTURE).total_sites).toBe(
+      STATS_SUMMARY_FIXTURE.total_sites,
+    );
+  });
+
+  it('laisse passer la vraie requête quand useMockFixtures est désactivé', () => {
+    environment.useMockFixtures = false;
+
+    http.get(`${environment.apiUrl}/stats/summary`).subscribe();
+
+    const req = httpMock.expectOne(`${environment.apiUrl}/stats/summary`);
+    req.flush({});
+  });
+
+  it("laisse passer une requête qui ne correspond à aucune route connue de l'interceptor", () => {
+    environment.useMockFixtures = true;
+
+    http.get('/api/v1/autre-chose').subscribe();
+
+    const req = httpMock.expectOne('/api/v1/autre-chose');
+    req.flush({});
+  });
+
+  it('renvoie la fixture des alertes sans appel réseau quand useMockFixtures est activé', () => {
+    environment.useMockFixtures = true;
+    let result: unknown;
+
+    http.get(`${environment.apiUrl}/alerts`).subscribe((r) => (result = r));
+
+    httpMock.expectNone(`${environment.apiUrl}/alerts`);
+    expect((result as unknown[]).length).toBeGreaterThan(0);
+  });
+});

apps/frontend/src/app/core/interceptors/mock-api-interceptor.ts

@@ -0,0 +1,30 @@
+import { HttpInterceptorFn, HttpResponse } from '@angular/common/http';
+import { of } from 'rxjs';
+import { environment } from '../../../environments/environment';
+import { STATS_SUMMARY_FIXTURE } from '../mocks/stats-summary.fixture';
+import { ALERTS_FIXTURE } from '../mocks/alerts.fixture';
+
+function withJitter(base: typeof STATS_SUMMARY_FIXTURE) {
+  const jitter = () => (Math.random() - 0.5) * 40;
+  const totalConsumption = Math.max(0, base.total_consumption_kw + jitter());
+
+  return {
+    ...base,
+    timestamp: new Date().toISOString(),
+    total_consumption_kw: Math.round(totalConsumption * 100) / 100,
+    average_load_percent: Math.round((totalConsumption / base.total_capacity_kw) * 1000) / 10,
+  };
+}
+
+export const mockApiInterceptor: HttpInterceptorFn = (req, next) => {
+  if (!environment.useMockFixtures) {
+    return next(req);
+  }
+  if (req.url.endsWith(`${environment.apiUrl}/stats/summary`)) {
+    return of(new HttpResponse({ status: 200, body: withJitter(STATS_SUMMARY_FIXTURE) }));
+  }
+  if (req.url.endsWith(`${environment.apiUrl}/alerts`)) {
+    return of(new HttpResponse({ status: 200, body: ALERTS_FIXTURE }));
+  }
+  return next(req);
+};

apps/frontend/src/app/core/mocks/alerts.fixture.ts

@@ -0,0 +1,54 @@
+import { Alert } from '../../shared/models/alert.model';
+
+export const ALERTS_FIXTURE: Alert[] = [
+  {
+    alert_id: 'ALR-SITE002-1718458320',
+    timestamp: '2026-09-15T11:12:00',
+    site_id: 'SITE002',
+    severity: 'critical',
+    type: 'outage',
+    message: 'Risque de surcharge sur Usine Lyon Vénissieux',
+    value: 812.5,
+    threshold: 720.0,
+  },
+  {
+    alert_id: 'ALR-SITE003-1718458321',
+    timestamp: '2026-09-15T11:05:00',
+    site_id: 'SITE003',
+    severity: 'critical',
+    type: 'sensor',
+    message: 'Perte réseau totale sur Data Center Marseille',
+    value: 0,
+    threshold: 0,
+  },
+  {
+    alert_id: 'ALR-SITE005-1718458322',
+    timestamp: '2026-09-15T10:47:00',
+    site_id: 'SITE005',
+    severity: 'high',
+    type: 'threshold',
+    message: 'Usine Toulouse approche de son seuil de capacité',
+    value: 410.0,
+    threshold: 480.0,
+  },
+  {
+    alert_id: 'ALR-SITE006-1718458323',
+    timestamp: '2026-09-15T10:30:00',
+    site_id: 'SITE006',
+    severity: 'medium',
+    type: 'sensor',
+    message: 'Capteur de température défaillant sur Bureau Lille',
+    value: 0,
+    threshold: 0,
+  },
+  {
+    alert_id: 'ALR-SITE004-1718458324',
+    timestamp: '2026-09-15T09:58:00',
+    site_id: 'SITE004',
+    severity: 'low',
+    type: 'anomaly',
+    message: 'Comportement de consommation inhabituel sur Bureau Bordeaux',
+    value: 62.0,
+    threshold: 55.0,
+  },
+];

apps/frontend/src/app/core/mocks/stats-summary.fixture.ts

@@ -0,0 +1,67 @@
+import { StatsSummary } from '../../shared/models/stats.model';
+
+export const STATS_SUMMARY_FIXTURE: StatsSummary = {
+  timestamp: '2026-09-15T11:32:00',
+  total_sites: 7,
+  total_consumption_kw: 1826.44,
+  total_capacity_kw: 3830,
+  average_load_percent: 55.1,
+  sites: [
+    {
+      site_id: 'SITE001',
+      site_name: 'Bureau Paris La Défense',
+      current_consumption_kw: 87.34,
+      capacity_kw: 200,
+      load_percent: 43.7,
+      data_quality: 'good',
+    },
+    {
+      site_id: 'SITE002',
+      site_name: 'Usine Lyon Vénissieux',
+      current_consumption_kw: 542.1,
+      capacity_kw: 1000,
+      load_percent: 54.2,
+      data_quality: 'good',
+    },
+    {
+      site_id: 'SITE003',
+      site_name: 'Data Center Marseille',
+      current_consumption_kw: null,
+      capacity_kw: 800,
+      load_percent: null,
+      data_quality: 'critical',
+    },
+    {
+      site_id: 'SITE004',
+      site_name: 'Bureau Bordeaux',
+      current_consumption_kw: 62.0,
+      capacity_kw: 150,
+      load_percent: 41.3,
+      data_quality: 'partial',
+    },
+    {
+      site_id: 'SITE005',
+      site_name: 'Usine Toulouse',
+      current_consumption_kw: 410.0,
+      capacity_kw: 600,
+      load_percent: 68.3,
+      data_quality: 'good',
+    },
+    {
+      site_id: 'SITE006',
+      site_name: 'Bureau Lille',
+      current_consumption_kw: 95.0,
+      capacity_kw: 180,
+      load_percent: 52.8,
+      data_quality: 'degraded',
+    },
+    {
+      site_id: 'SITE007',
+      site_name: 'Data Center Nantes',
+      current_consumption_kw: 630.0,
+      capacity_kw: 900,
+      load_percent: 70.0,
+      data_quality: 'good',
+    },
+  ],
+};

apps/frontend/src/app/core/services/alerts.service.spec.ts

@@ -0,0 +1,43 @@
+import { TestBed } from '@angular/core/testing';
+import { provideHttpClient } from '@angular/common/http';
+import { provideHttpClientTesting, HttpTestingController } from '@angular/common/http/testing';
+import { AlertsService } from './alerts.service';
+import { environment } from '../../../environments/environment';
+
+describe('AlertsService', () => {
+  let service: AlertsService;
+  let httpMock: HttpTestingController;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [provideHttpClient(), provideHttpClientTesting()],
+    });
+    service = TestBed.inject(AlertsService);
+    httpMock = TestBed.inject(HttpTestingController);
+  });
+
+  afterEach(() => httpMock.verify());
+
+  it("appelle le bon endpoint et retourne un tableau d'alertes", () => {
+    let result: unknown;
+    service.getAlerts().subscribe((r) => (result = r));
+
+    const req = httpMock.expectOne(`${environment.apiUrl}/alerts`);
+    expect(req.request.method).toBe('GET');
+
+    req.flush([
+      {
+        alert_id: 'ALR-TEST-1',
+        timestamp: '2026-09-15T12:00:00',
+        site_id: 'SITE001',
+        severity: 'high',
+        type: 'threshold',
+        message: 'Test',
+        value: 100,
+        threshold: 90,
+      },
+    ]);
+
+    expect((result as unknown[]).length).toBe(1);
+  });
+});

apps/frontend/src/app/core/services/alerts.service.ts

@@ -0,0 +1,13 @@
+import { Service, inject } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+import { environment } from '../../../environments/environment';
+import { Alert } from '../../shared/models/alert.model';
+
+@Service()
+export class AlertsService {
+  private http = inject(HttpClient);
+
+  getAlerts() {
+    return this.http.get<Alert[]>(`${environment.apiUrl}/alerts`);
+  }
+}

apps/frontend/src/app/core/services/auth.service.spec.ts

@@ -0,0 +1,86 @@
+import { TestBed } from '@angular/core/testing';
+import { provideHttpClient } from '@angular/common/http';
+import { provideHttpClientTesting, HttpTestingController } from '@angular/common/http/testing';
+import { AuthService } from './auth.service';
+import { environment } from '../../../environments/environment';
+
+describe('AuthService', () => {
+  let service: AuthService;
+  let httpMock: HttpTestingController;
+
+  const tokenResponse = {
+    access_token: 'abc123',
+    token_type: 'bearer',
+    expires_in: 900,
+    principal: {
+      id: '1',
+      email: 'a@a.com',
+      role: 'admin' as const,
+      kind: 'human' as const,
+      must_change_password: false,
+    },
+  };
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [provideHttpClient(), provideHttpClientTesting()],
+    });
+    service = TestBed.inject(AuthService);
+    httpMock = TestBed.inject(HttpTestingController);
+  });
+
+  afterEach(() => httpMock.verify());
+
+  it('stocke le token et le principal après un login réussi', () => {
+    service.login({ email: 'a@a.com', password: 'secret' }).subscribe();
+
+    const req = httpMock.expectOne(`${environment.apiUrl}/auth/login`);
+    expect(req.request.withCredentials).toBe(true);
+    req.flush(tokenResponse);
+
+    expect(service.getAccessToken()).toBe('abc123');
+    expect(service.principal()?.email).toBe('a@a.com');
+    expect(service.isAuthenticated()).toBe(true);
+  });
+
+  it('efface la session au logout', () => {
+    service.login({ email: 'a@a.com', password: 'secret' }).subscribe();
+    httpMock.expectOne(`${environment.apiUrl}/auth/login`).flush(tokenResponse);
+
+    service.logout().subscribe();
+    httpMock.expectOne(`${environment.apiUrl}/auth/logout`).flush(null);
+
+    expect(service.getAccessToken()).toBeNull();
+    expect(service.isAuthenticated()).toBe(false);
+  });
+
+  it("ne déclenche qu'un seul appel réseau si refreshShared est appelé plusieurs fois avant la réponse", () => {
+    service.refreshShared().subscribe();
+    service.refreshShared().subscribe();
+    service.refreshShared().subscribe();
+
+    const requests = httpMock.match(`${environment.apiUrl}/auth/refresh`);
+    expect(requests.length).toBe(1);
+    requests[0].flush(tokenResponse);
+  });
+
+  it('met à jour la session après un changement de mot de passe réussi', () => {
+    service.changePassword({ current_password: 'old', new_password: 'new-password-1234' }).subscribe();
+
+    const req = httpMock.expectOne(`${environment.apiUrl}/auth/password`);
+    req.flush(tokenResponse);
+
+    expect(service.getAccessToken()).toBe('abc123');
+  });
+
+  it('récupère le principal courant via /auth/me', () => {
+  let result: unknown;
+  service.me().subscribe((r) => (result = r));
+
+  const req = httpMock.expectOne(`${environment.apiUrl}/auth/me`);
+  expect(req.request.method).toBe('GET');
+  req.flush(tokenResponse.principal);
+
+  expect(result).toEqual(tokenResponse.principal);
+});
+});

apps/frontend/src/app/core/services/auth.service.ts

@@ -0,0 +1,69 @@
+import { Service, signal, computed, inject } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+import { Observable, tap, finalize, shareReplay } from 'rxjs';
+import { LoginRequest, PasswordChangeRequest, Principal, TokenResponse } from '../../shared/models/auth.model';
+import { environment } from '../../../environments/environment';
+
+@Service()
+export class AuthService {
+  private http = inject(HttpClient);
+
+  // Jamais de localStorage/sessionStorage/cookie côté JS : juste un signal en
+  // mémoire. Un rechargement de page le perd, c'est voulu par le contrat.
+  private accessTokenSignal = signal<string | null>(null);
+  private principalSignal = signal<Principal | null>(null);
+
+  readonly principal = this.principalSignal.asReadonly();
+  readonly isAuthenticated = computed(() => this.principalSignal() !== null);
+
+  private rotation$?: Observable<TokenResponse>;
+
+  getAccessToken(): string | null {
+    return this.accessTokenSignal();
+  }
+
+  private setSession(response: TokenResponse): void {
+    this.accessTokenSignal.set(response.access_token);
+    this.principalSignal.set(response.principal);
+  }
+
+  clearSession(): void {
+    this.accessTokenSignal.set(null);
+    this.principalSignal.set(null);
+  }
+
+  login(credentials: LoginRequest): Observable<TokenResponse> {
+    return this.http
+      .post<TokenResponse>(`${environment.apiUrl}/auth/login`, credentials, { withCredentials: true })
+      .pipe(tap((response) => this.setSession(response)));
+  }
+
+  // Un seul rafraîchissement en vol à la fois, partagé entre tous les
+  // appelants (sinon le serveur révoque toute la session sur des rotations concurrentes).
+  refreshShared(): Observable<TokenResponse> {
+    this.rotation$ ??= this.http
+      .post<TokenResponse>(`${environment.apiUrl}/auth/refresh`, {}, { withCredentials: true })
+      .pipe(
+        tap((response) => this.setSession(response)),
+        finalize(() => (this.rotation$ = undefined)),
+        shareReplay(1)
+      );
+    return this.rotation$;
+  }
+
+  logout(): Observable<void> {
+    return this.http
+      .post<void>(`${environment.apiUrl}/auth/logout`, {}, { withCredentials: true })
+      .pipe(tap(() => this.clearSession()));
+  }
+
+  changePassword(payload: PasswordChangeRequest): Observable<TokenResponse> {
+    return this.http
+      .post<TokenResponse>(`${environment.apiUrl}/auth/password`, payload, { withCredentials: true })
+      .pipe(tap((response) => this.setSession(response)));
+  }
+
+  me(): Observable<Principal> {
+    return this.http.get<Principal>(`${environment.apiUrl}/auth/me`);
+  }
+}

apps/frontend/src/app/core/services/stats.service.spec.ts

@@ -0,0 +1,39 @@
+import { TestBed } from '@angular/core/testing';
+import { provideHttpClient } from '@angular/common/http';
+import { provideHttpClientTesting, HttpTestingController } from '@angular/common/http/testing';
+import { StatsService } from './stats.service';
+import { environment } from '../../../environments/environment';
+
+describe('StatsService', () => {
+  let service: StatsService;
+  let httpMock: HttpTestingController;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [provideHttpClient(), provideHttpClientTesting()],
+    });
+    service = TestBed.inject(StatsService);
+    httpMock = TestBed.inject(HttpTestingController);
+  });
+
+  afterEach(() => httpMock.verify());
+
+  it('appelle le bon endpoint et retourne le résumé', () => {
+    let result: unknown;
+    service.getSummary().subscribe((r) => (result = r));
+
+    const req = httpMock.expectOne(`${environment.apiUrl}/stats/summary`);
+    expect(req.request.method).toBe('GET');
+
+    req.flush({
+      timestamp: '2026-09-15T12:00:00',
+      total_sites: 7,
+      total_consumption_kw: 1800,
+      total_capacity_kw: 3800,
+      average_load_percent: 47.4,
+      sites: [],
+    });
+
+    expect((result as { total_sites: number }).total_sites).toBe(7);
+  });
+});

apps/frontend/src/app/core/services/stats.service.ts

@@ -0,0 +1,13 @@
+import { Service, inject } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+import { environment } from '../../../environments/environment';
+import { StatsSummary } from '../../shared/models/stats.model';
+
+@Service()
+export class StatsService {
+  private http = inject(HttpClient);
+
+  getSummary() {
+    return this.http.get<StatsSummary>(`${environment.apiUrl}/stats/summary`);
+  }
+}

apps/frontend/src/app/features/auth/change-password/change-password.html

@@ -0,0 +1,31 @@
+<div class="auth-page">
+  <form class="auth-card" [formGroup]="form" (ngSubmit)="onSubmit()">
+    <h1>Nouveau mot de passe</h1>
+    <p class="auth-subtitle">Votre mot de passe est provisoire, vous devez le modifier avant de continuer</p>
+
+    <label for="current_password">Mot de passe actuel</label>
+    <input
+      id="current_password"
+      type="password"
+      formControlName="current_password"
+      autocomplete="current-password"
+    />
+
+    <label for="new_password">Nouveau mot de passe</label>
+    <input
+      id="new_password"
+      type="password"
+      formControlName="new_password"
+      autocomplete="new-password"
+    />
+    <span class="auth-hint">12 à 128 caractères</span>
+
+    @if (errorMessage()) {
+      <p class="auth-error">{{ errorMessage() }}</p>
+    }
+
+    <button type="submit" [disabled]="form.invalid || isLoading()">
+      {{ isLoading() ? 'Modification...' : 'Valider' }}
+    </button>
+  </form>
+</div>

apps/frontend/src/app/features/auth/change-password/change-password.scss

@@ -0,0 +1,88 @@
+:host {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  min-height: 100vh;
+  background: #f3f4f6;
+  font-family: 'Segoe UI', system-ui, sans-serif;
+}
+
+.auth-card {
+  background: #ffffff;
+  border: 1px solid #e5e7eb;
+  border-radius: 12px;
+  padding: 2.5rem;
+  width: 100%;
+  max-width: 360px;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
+  display: flex;
+  flex-direction: column;
+
+  h1 {
+    margin: 0;
+    font-size: 1.5rem;
+    font-weight: 700;
+    color: #1f2937;
+  }
+
+  .auth-subtitle {
+    margin: 0.25rem 0 1.5rem;
+    color: #6b7280;
+    font-size: 0.9rem;
+    line-height: 1.4;
+  }
+
+  label {
+    font-size: 0.85rem;
+    font-weight: 600;
+    color: #374151;
+    margin-bottom: 0.35rem;
+    margin-top: 1rem;
+  }
+
+  input {
+    padding: 0.6rem 0.75rem;
+    border: 1px solid #d1d5db;
+    border-radius: 8px;
+    font-size: 0.95rem;
+
+    &:focus {
+      outline: none;
+      border-color: #3b82f6;
+      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
+    }
+  }
+
+  button {
+    margin-top: 1.5rem;
+    padding: 0.7rem;
+    background: #3b82f6;
+    color: #fff;
+    border: none;
+    border-radius: 8px;
+    font-size: 0.95rem;
+    font-weight: 600;
+    cursor: pointer;
+
+    &:disabled {
+      background: #9ca3af;
+      cursor: not-allowed;
+    }
+
+    &:not(:disabled):hover {
+      background: #2563eb;
+    }
+  }
+}
+
+.auth-hint {
+  font-size: 0.75rem;
+  color: #9ca3af;
+  margin-top: 0.25rem;
+}
+
+.auth-error {
+  margin: 0.75rem 0 0;
+  color: #dc2626;
+  font-size: 0.85rem;
+}

apps/frontend/src/app/features/auth/change-password/change-password.spec.ts

@@ -0,0 +1,88 @@
+import { TestBed } from '@angular/core/testing';
+import { ReactiveFormsModule } from '@angular/forms';
+import { Router } from '@angular/router';
+import { of, throwError } from 'rxjs';
+import { vi } from 'vitest';
+import { ChangePassword } from './change-password';
+import { AuthService } from '../../../core/services/auth.service';
+
+describe('ChangePassword', () => {
+  let authMock: { changePassword: ReturnType<typeof vi.fn> };
+  let routerMock: { navigate: ReturnType<typeof vi.fn> };
+
+  beforeEach(async () => {
+    authMock = { changePassword: vi.fn() };
+    routerMock = { navigate: vi.fn() };
+
+    await TestBed.configureTestingModule({
+      imports: [ChangePassword, ReactiveFormsModule],
+      providers: [
+        { provide: AuthService, useValue: authMock },
+        { provide: Router, useValue: routerMock },
+      ],
+    }).compileComponents();
+  });
+
+  it('ne soumet pas si le formulaire est invalide (mot de passe trop court)', () => {
+    const fixture = TestBed.createComponent(ChangePassword);
+    const component = fixture.componentInstance;
+    component.form.setValue({ current_password: 'old', new_password: 'trop-court' });
+
+    component.onSubmit();
+    expect(authMock.changePassword).not.toHaveBeenCalled();
+  });
+
+  it('redirige vers /dashboard après un changement réussi', () => {
+    const fixture = TestBed.createComponent(ChangePassword);
+    const component = fixture.componentInstance;
+    component.form.setValue({ current_password: 'ancien-mot-de-passe', new_password: 'un-nouveau-mot-de-passe-valide' });
+
+    authMock.changePassword.mockReturnValue(of({ principal: { role: 'admin' } }));
+
+    component.onSubmit();
+    expect(routerMock.navigate).toHaveBeenCalledWith(['/dashboard']);
+  });
+
+  it("affiche un message d'erreur si le mot de passe actuel est incorrect", () => {
+  const fixture = TestBed.createComponent(ChangePassword);
+  const component = fixture.componentInstance;
+  component.form.setValue({ current_password: 'mauvais-mot-de-passe', new_password: 'un-nouveau-mot-de-passe-valide' });
+
+  authMock.changePassword.mockReturnValue(throwError(() => new Error('401')));
+
+  component.onSubmit();
+  fixture.detectChanges(); // rend le bloc @if (errorMessage())
+
+  expect(component.errorMessage()).toContain('incorrect');
+  const errorEl = fixture.nativeElement.querySelector('.auth-error');
+  expect(errorEl?.textContent).toContain('incorrect');
+  });
+
+  it('désactive le bouton tant que le formulaire est invalide', () => {
+  const fixture = TestBed.createComponent(ChangePassword);
+  fixture.detectChanges();
+
+  const button = fixture.nativeElement.querySelector('button[type="submit"]');
+  expect(button.disabled).toBe(true);
+  expect(fixture.nativeElement.querySelector('.auth-error')).toBeNull();
+  });
+
+  it('déclenche onSubmit via la soumission réelle du formulaire (ngSubmit)', () => {
+  const fixture = TestBed.createComponent(ChangePassword);
+  const component = fixture.componentInstance;
+  component.form.setValue({ current_password: 'ancien-mot-de-passe', new_password: 'un-nouveau-mot-de-passe-valide' });
+  fixture.detectChanges();
+
+  authMock.changePassword.mockReturnValue(of({ principal: { role: 'admin' } }));
+
+  const form = fixture.nativeElement.querySelector('form');
+  form.dispatchEvent(new Event('submit'));
+  fixture.detectChanges();
+
+  expect(authMock.changePassword).toHaveBeenCalledWith({
+    current_password: 'ancien-mot-de-passe',
+    new_password: 'un-nouveau-mot-de-passe-valide',
+  });
+});
+
+});

apps/frontend/src/app/features/auth/change-password/change-password.ts

@@ -0,0 +1,41 @@
+import { Component, inject, signal } from '@angular/core';
+import { ReactiveFormsModule, FormBuilder, Validators } from '@angular/forms';
+import { Router } from '@angular/router';
+import { AuthService } from '../../../core/services/auth.service';
+
+@Component({
+  selector: 'app-change-password',
+  standalone: true,
+  imports: [ReactiveFormsModule],
+  templateUrl: './change-password.html',
+  styleUrl: './change-password.scss',
+})
+export class ChangePassword {
+  private fb = inject(FormBuilder);
+  private auth = inject(AuthService);
+  private router = inject(Router);
+
+  errorMessage = signal<string | null>(null);
+  isLoading = signal(false);
+
+  form = this.fb.nonNullable.group({
+    current_password: ['', Validators.required],
+    new_password: ['', [Validators.required, Validators.minLength(12), Validators.maxLength(128)]],
+  });
+
+  onSubmit(): void {
+    if (this.form.invalid) return;
+    this.isLoading.set(true);
+    this.errorMessage.set(null);
+
+    this.auth.changePassword(this.form.getRawValue()).subscribe({
+      next: (response) => {
+        this.router.navigate(['/dashboard']);
+      },
+      error: () => {
+        this.isLoading.set(false);
+        this.errorMessage.set('Mot de passe actuel incorrect, ou nouveau mot de passe invalide (12 à 128 caractères).');
+      },
+    });
+  }
+}

apps/frontend/src/app/features/auth/login/login.html

@@ -0,0 +1,36 @@
+<div class="auth-page">
+  <form class="auth-card" [formGroup]="form" (ngSubmit)="onSubmit()">
+    <h1>Connexion</h1>
+    <p class="auth-subtitle">Accédez à votre espace EnerVision</p>
+
+    <label for="email">Email</label>
+    <input
+      id="email"
+      type="email"
+      formControlName="email"
+      autocomplete="username"
+      placeholder="vous@enervision.fr"
+    />
+
+    <label for="password">Mot de passe</label>
+    <input
+      id="password"
+      type="password"
+      formControlName="password"
+      autocomplete="current-password"
+    />
+
+    @if (errorMessage()) {
+      <p class="auth-error">
+        {{ errorMessage() }}
+        @if (retryAfterSeconds(); as seconds) {
+          (réessayez dans {{ seconds }}s)
+        }
+      </p>
+    }
+
+    <button type="submit" [disabled]="form.invalid || isLoading()">
+      {{ isLoading() ? 'Connexion...' : 'Se connecter' }}
+    </button>
+  </form>
+</div>

apps/frontend/src/app/features/auth/login/login.scss

@@ -0,0 +1,81 @@
+:host {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  min-height: 100vh;
+  background: #f3f4f6;
+  font-family: 'Segoe UI', system-ui, sans-serif;
+}
+
+.auth-card {
+  background: #ffffff;
+  border: 1px solid #e5e7eb;
+  border-radius: 12px;
+  padding: 2.5rem;
+  width: 100%;
+  max-width: 360px;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
+  display: flex;
+  flex-direction: column;
+
+  h1 {
+    margin: 0;
+    font-size: 1.5rem;
+    font-weight: 700;
+    color: #1f2937;
+  }
+
+  .auth-subtitle {
+    margin: 0.25rem 0 1.5rem;
+    color: #6b7280;
+    font-size: 0.9rem;
+  }
+
+  label {
+    font-size: 0.85rem;
+    font-weight: 600;
+    color: #374151;
+    margin-bottom: 0.35rem;
+    margin-top: 1rem;
+  }
+
+  input {
+    padding: 0.6rem 0.75rem;
+    border: 1px solid #d1d5db;
+    border-radius: 8px;
+    font-size: 0.95rem;
+
+    &:focus {
+      outline: none;
+      border-color: #3b82f6;
+      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
+    }
+  }
+
+  button {
+    margin-top: 1.5rem;
+    padding: 0.7rem;
+    background: #3b82f6;
+    color: #fff;
+    border: none;
+    border-radius: 8px;
+    font-size: 0.95rem;
+    font-weight: 600;
+    cursor: pointer;
+
+    &:disabled {
+      background: #9ca3af;
+      cursor: not-allowed;
+    }
+
+    &:not(:disabled):hover {
+      background: #2563eb;
+    }
+  }
+}
+
+.auth-error {
+  margin: 0.75rem 0 0;
+  color: #dc2626;
+  font-size: 0.85rem;
+}

apps/frontend/src/app/features/auth/login/login.spec.ts

@@ -0,0 +1,110 @@
+import { TestBed } from '@angular/core/testing';
+import { ReactiveFormsModule } from '@angular/forms';
+import { Router } from '@angular/router';
+import { HttpErrorResponse, HttpHeaders } from '@angular/common/http';
+import { of, throwError } from 'rxjs';
+import { vi } from 'vitest';
+import { Login } from './login';
+import { AuthService } from '../../../core/services/auth.service';
+
+describe('Login', () => {
+  let authMock: { login: ReturnType<typeof vi.fn> };
+  let routerMock: { navigate: ReturnType<typeof vi.fn> };
+
+  beforeEach(async () => {
+    authMock = { login: vi.fn() };
+    routerMock = { navigate: vi.fn() };
+
+    await TestBed.configureTestingModule({
+      imports: [Login, ReactiveFormsModule],
+      providers: [
+        { provide: AuthService, useValue: authMock },
+        { provide: Router, useValue: routerMock },
+      ],
+    }).compileComponents();
+  });
+
+  it('ne soumet pas si le formulaire est invalide', () => {
+    const fixture = TestBed.createComponent(Login);
+    fixture.componentInstance.onSubmit();
+    expect(authMock.login).not.toHaveBeenCalled();
+  });
+
+  it('redirige vers /change-password si must_change_password est vrai', () => {
+    const fixture = TestBed.createComponent(Login);
+    const component = fixture.componentInstance;
+    component.form.setValue({ email: 'a@a.com', password: 'secret' });
+
+    authMock.login.mockReturnValue(of({ principal: { role: 'admin', must_change_password: true } }));
+
+    component.onSubmit();
+    expect(routerMock.navigate).toHaveBeenCalledWith(['/change-password']);
+  });
+
+  it('redirige vers /dashboard si le mot de passe est déjà à jour', () => {
+    const fixture = TestBed.createComponent(Login);
+    const component = fixture.componentInstance;
+    component.form.setValue({ email: 'a@a.com', password: 'secret' });
+
+    authMock.login.mockReturnValue(of({ principal: { role: 'lecteur', must_change_password: false } }));
+
+    component.onSubmit();
+    expect(routerMock.navigate).toHaveBeenCalledWith(['/dashboard']);
+  });
+
+  it('affiche un message générique sur un 401', () => {
+  const fixture = TestBed.createComponent(Login);
+  const component = fixture.componentInstance;
+  component.form.setValue({ email: 'a@a.com', password: 'wrong' });
+
+  authMock.login.mockReturnValue(throwError(() => new HttpErrorResponse({ status: 401 })));
+
+  component.onSubmit();
+  fixture.detectChanges(); // rend le bloc @if (errorMessage()) du template
+
+  expect(component.errorMessage()).toBe('Email ou mot de passe incorrect.');
+  const errorEl = fixture.nativeElement.querySelector('.auth-error');
+  expect(errorEl?.textContent).toContain('Email ou mot de passe incorrect.');
+  });
+
+  it("affiche le délai d'attente sur un 429 avec Retry-After", () => {
+    const fixture = TestBed.createComponent(Login);
+    const component = fixture.componentInstance;
+    component.form.setValue({ email: 'a@a.com', password: 'wrong' });
+
+    authMock.login.mockReturnValue(
+      throwError(() => new HttpErrorResponse({ status: 429, headers: new HttpHeaders({ 'Retry-After': '30' }) }))
+    );
+
+    component.onSubmit();
+    fixture.detectChanges(); // rend aussi le sous-bloc @if (retryAfterSeconds(); as seconds)
+
+    expect(component.retryAfterSeconds()).toBe(30);
+    const errorEl = fixture.nativeElement.querySelector('.auth-error');
+    expect(errorEl?.textContent).toContain('30s');
+  });
+
+  it('désactive le bouton tant que le formulaire est invalide', () => {
+    const fixture = TestBed.createComponent(Login);
+    fixture.detectChanges();
+
+    const button = fixture.nativeElement.querySelector('button[type="submit"]');
+    expect(button.disabled).toBe(true);
+    expect(fixture.nativeElement.querySelector('.auth-error')).toBeNull();
+  });
+
+ it('déclenche onSubmit via la soumission réelle du formulaire (ngSubmit)', () => {
+  const fixture = TestBed.createComponent(Login);
+  const component = fixture.componentInstance;
+  component.form.setValue({ email: 'a@a.com', password: 'secret' });
+  fixture.detectChanges();
+
+  authMock.login.mockReturnValue(of({ principal: { role: 'lecteur', must_change_password: false } }));
+
+  const form = fixture.nativeElement.querySelector('form');
+  form.dispatchEvent(new Event('submit'));
+  fixture.detectChanges();
+
+  expect(authMock.login).toHaveBeenCalledWith({ email: 'a@a.com', password: 'secret' });
+  });
+});