Merge branch 'dev' into feat/supervision-des-capteurs

apps/backend/TESTING.md

@@ -123,6 +123,11 @@ async def test_repository_reads_back_what_it_wrote(session: AsyncSession) -> Non
 defaut, ce qui garde `make check` jouable sans Docker. Tout autre marqueur doit etre
 declare dans `pyproject.toml` : `--strict-markers` refuse les marqueurs inconnus.
 
+Ces tests ne sont pas pour autant facultatifs : le job `integration` de
+`.github/workflows/backend.yml` monte un service TimescaleDB, applique les migrations et
+les joue a chaque poussee. Un test `integration` casse donc la CI comme un autre. En local,
+`make db-up` puis `make test-integration`.
+
 ## Couverture
 
 Les branches sont mesurees, pas seulement les lignes. Le seuil de 85 % ne s'applique
@@ -142,14 +147,27 @@ uv run pytest tests/api/test_health.py           # un seul fichier
 uv run pytest -k readiness                       # par motif de nom
 ```
 
-## Trois fichiers à connaître avant de toucher à l'authentification
+## Quatre fichiers à connaître avant de toucher à l'authentification
+
+`tests/api/acces.py` porte la classification des routes du contrat, en quatre ensembles :
+`ROUTES_PUBLIQUES`, `ROUTE_COOKIE`, `ROUTES_SANS_ROLE` et la table `ROLE_MINIMUM`. Ce n'est pas
+un fichier de test, c'est la référence que les trois autres confrontent au comportement observé.
+**Toute route ajoutée doit y être classée** : `test_every_declared_route_is_classified` échoue
+sinon, et échoue aussi sur une entrée qui ne correspond plus à aucune route.
 
 `tests/api/test_route_protection.py` interroge réellement chaque route sans identifiant et
 échoue si l'une d'elles répond autre chose qu'un 401 ou un 403. Il n'inspecte pas l'arbre de
 dépendances : celui-ci n'est accessible que par l'API privée de FastAPI, et surtout une route
 peut porter la bonne dépendance tout en répondant quand même. **Rendre une route publique impose
-donc de modifier la liste `ROUTES_PUBLIQUES` de ce fichier**, ce qui apparaît en clair dans la
-diff d'une pull request.
+donc de modifier `ROUTES_PUBLIQUES` dans `acces.py`**, ce qui apparaît en clair dans la diff
+d'une pull request.
+
+`tests/api/test_matrice_acces.py` croise chaque route gardée avec chacun des trois rôles, dans
+les deux sens : un rôle insuffisant reçoit un 403 `Droits insuffisants`, un rôle suffisant ne le
+reçoit jamais. Le second sens est ce qui rend visible une garde posée trop haut, par exemple
+`AdminDep` sur une route de lecture. La même matrice est rejouée sous `integration` avec de vrais
+jetons, donc en traversant le décodage du JWT et la relecture du compte en base, que
+`dependency_overrides` court-circuite.
 
 `tests/services/test_auth.py` donne au faux hacheur un **compteur d'appels**. C'est ce qui rend
 possibles les deux assertions qui prouvent la conception, et qu'aucune autre forme de test

apps/backend/app/api/deps.py

@@ -27,6 +27,7 @@ from app.repositories.audit_log import AuditLogRepository
 from app.repositories.login_attempt import LoginAttemptRepository
 from app.repositories.password_reset_attempt import PasswordResetAttemptRepository
 from app.repositories.password_reset_token import PasswordResetTokenRepository
+from app.repositories.prediction import PredictionRepository
 from app.repositories.reading import ReadingRepository
 from app.repositories.recommendation import RecommendationRepository
 from app.repositories.refresh_token import RefreshTokenRepository
@@ -34,6 +35,7 @@ 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, PasswordResetPolicy
+from app.services.prediction import PredictionService
 from app.services.reading import ReadingService
 from app.services.recommendation import RecommendationService
 from app.services.sensor import SensorService
@@ -212,6 +214,15 @@ def get_sensor_service(session: SessionDep) -> SensorService:
 SensorServiceDep = Annotated[SensorService, Depends(get_sensor_service)]
 
 
+def get_prediction_service(session: SessionDep) -> PredictionService:
+    return PredictionService(
+        sites=SiteRepository(session), predictions=PredictionRepository(session)
+    )
+
+
+PredictionServiceDep = Annotated[PredictionService, Depends(get_prediction_service)]
+
+
 async def get_current_principal(
     credentials: CredentialsDep,
     session: SessionDep,

apps/backend/app/api/openapi.py

@@ -83,6 +83,13 @@ TAGS: Final[list[dict[str, Any]]] = [
         "name": "sensors",
         "description": "État de santé des capteurs par site. Réservé au rôle `admin`.",
     },
+    {
+        "name": "predictions",
+        "description": (
+            "Dernière prévision de consommation par site, calculée hors ligne par le pipeline "
+            "de scoring (`ml/`) et simplement lue ici. Accessible à partir du rôle `lecteur`."
+        ),
+    },
 ]
 
 cookie_de_rafraichissement = APIKeyCookie(

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

@@ -0,0 +1,18 @@
+from fastapi import APIRouter
+
+from app.api.deps import LecteurDep, PredictionServiceDep
+from app.schemas.prediction import PredictionSummaryResponse
+
+router = APIRouter()
+
+
+@router.get(
+    "",
+    response_model=PredictionSummaryResponse,
+    summary="Dernière prédiction de consommation par site",
+)
+async def get_predictions(
+    _: LecteurDep, service: PredictionServiceDep
+) -> PredictionSummaryResponse:
+    resume = await service.summary()
+    return PredictionSummaryResponse.model_validate(resume)

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

@@ -5,6 +5,7 @@ from app.api.v1.endpoints import (
     alerts,
     auth,
     health,
+    predictions,
     readings,
     recommendations,
     sensors,
@@ -34,3 +35,6 @@ api_router.include_router(
 api_router.include_router(
     sensors.router, prefix="/sensors", tags=["sensors"], responses=REPONSES_ADMIN
 )
+api_router.include_router(
+    predictions.router, prefix="/predictions", tags=["predictions"], responses=REPONSES_LECTEUR
+)

apps/backend/app/repositories/prediction.py

@@ -0,0 +1,28 @@
+from collections.abc import Sequence
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.energy import Prediction
+
+
+class PredictionRepository:
+    def __init__(self, session: AsyncSession) -> None:
+        self._session = session
+
+    async def latest_by_site(self) -> Sequence[Prediction]:
+        # `.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. Même mécanisme que
+        # `ReadingRepository.latest_by_site`. Trié sur `target_at` (couvert par
+        # `ix_prediction_site_target`) plutôt que `created_at` : c'est la prévision la plus
+        # récente qui compte pour un tableau de bord, pas forcément le dernier run de scoring.
+        requete = (
+            select(Prediction)
+            .distinct(Prediction.site_id)
+            .order_by(
+                Prediction.site_id,
+                Prediction.target_at.desc(),
+                Prediction.prediction_id.desc(),
+            )
+        )
+        return (await self._session.scalars(requete)).all()

apps/backend/app/schemas/prediction.py

@@ -0,0 +1,43 @@
+from datetime import datetime
+from enum import StrEnum
+
+from pydantic import BaseModel, ConfigDict
+
+
+class PredictionTargetMetric(StrEnum):
+    CONSUMPTION_KWH = "consumption_kwh"
+    CONSUMPTION_KW = "consumption_kw"
+
+
+class PredictionStatus(StrEnum):
+    AVAILABLE = "available"
+    INSUFFICIENT_DATA = "insufficient_data"
+    ERROR = "error"
+
+
+class SitePredictionResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    target_at: datetime
+    target_metric: PredictionTargetMetric
+    period_minutes: int | None
+    predicted_value: float | None
+    status: PredictionStatus
+    failure_reason: str | None
+    model_reference: str
+    created_at: datetime
+
+
+class SitePredictionSummaryResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    site_id: str
+    site_name: str
+    prediction: SitePredictionResponse | None
+
+
+class PredictionSummaryResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    timestamp: datetime
+    sites: list[SitePredictionSummaryResponse]

apps/backend/app/services/prediction.py

@@ -0,0 +1,68 @@
+from dataclasses import dataclass
+from datetime import UTC, datetime
+
+from app.models.energy import Prediction, Site
+from app.repositories.prediction import PredictionRepository
+from app.repositories.site import SiteRepository
+
+
+@dataclass(frozen=True, slots=True)
+class SitePrediction:
+    target_at: datetime
+    target_metric: str
+    period_minutes: int | None
+    predicted_value: float | None
+    status: str
+    failure_reason: str | None
+    model_reference: str
+    created_at: datetime
+
+
+@dataclass(frozen=True, slots=True)
+class SitePredictionSummary:
+    site_id: str
+    site_name: str
+    prediction: SitePrediction | None
+
+
+@dataclass(frozen=True, slots=True)
+class PredictionSummary:
+    timestamp: datetime
+    sites: list[SitePredictionSummary]
+
+
+class PredictionService:
+    def __init__(self, sites: SiteRepository, predictions: PredictionRepository) -> None:
+        self._sites = sites
+        self._predictions = predictions
+
+    async def summary(self) -> PredictionSummary:
+        sites = await self._sites.list_all()
+        dernieres = {p.site_id: p for p in await self._predictions.latest_by_site()}
+
+        return PredictionSummary(
+            timestamp=datetime.now(UTC),
+            sites=[_resume_site(site, dernieres.get(site.site_id)) for site in sites],
+        )
+
+
+def _resume_site(site: Site, derniere: Prediction | None) -> SitePredictionSummary:
+    # Piège : l'absence de ligne signifie « jamais scoré », pas une valeur pseudo-statut, qui
+    # n'existe pas dans la contrainte de la table. `prediction` reste `None` plutôt que de
+    # fabriquer un statut absent du domaine `available`/`insufficient_data`/`error`.
+    prediction = None
+    if derniere is not None:
+        prediction = SitePrediction(
+            target_at=derniere.target_at,
+            target_metric=derniere.target_metric,
+            period_minutes=derniere.period_minutes,
+            predicted_value=derniere.predicted_value,
+            status=derniere.status,
+            failure_reason=derniere.failure_reason,
+            model_reference=derniere.model_reference,
+            created_at=derniere.created_at,
+        )
+
+    return SitePredictionSummary(
+        site_id=site.site_id, site_name=site.site_name, prediction=prediction
+    )

apps/backend/openapi.json

@@ -1719,6 +1719,62 @@
           }
         ]
       }
+    },
+    "/api/v1/predictions": {
+      "get": {
+        "tags": [
+          "predictions"
+        ],
+        "summary": "Dernière prédiction de consommation par site",
+        "operationId": "get_predictions_api_v1_predictions_get",
+        "responses": {
+          "200": {
+            "description": "Successful Response",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/PredictionSummaryResponse"
+                }
+              }
+            }
+          },
+          "500": {
+            "description": "Erreur interne. `correlation` identifie la trace côté serveur, qui n'est pas renvoyée au client.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/InternalErrorResponse"
+                }
+              }
+            }
+          },
+          "401": {
+            "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=`.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ErrorResponse"
+                }
+              }
+            }
+          },
+          "403": {
+            "description": "Mot de passe provisoire à changer (`detail` vaut `password_change_required`).",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ErrorResponse"
+                }
+              }
+            }
+          }
+        },
+        "security": [
+          {
+            "Jeton d'accès": []
+          }
+        ]
+      }
     }
   },
   "components": {
@@ -1972,6 +2028,45 @@
         ],
         "title": "PasswordChangeRequest"
       },
+      "PredictionStatus": {
+        "type": "string",
+        "enum": [
+          "available",
+          "insufficient_data",
+          "error"
+        ],
+        "title": "PredictionStatus"
+      },
+      "PredictionSummaryResponse": {
+        "properties": {
+          "timestamp": {
+            "type": "string",
+            "format": "date-time",
+            "title": "Timestamp"
+          },
+          "sites": {
+            "items": {
+              "$ref": "#/components/schemas/SitePredictionSummaryResponse"
+            },
+            "type": "array",
+            "title": "Sites"
+          }
+        },
+        "type": "object",
+        "required": [
+          "timestamp",
+          "sites"
+        ],
+        "title": "PredictionSummaryResponse"
+      },
+      "PredictionTargetMetric": {
+        "type": "string",
+        "enum": [
+          "consumption_kwh",
+          "consumption_kw"
+        ],
+        "title": "PredictionTargetMetric"
+      },
       "PrincipalResponse": {
         "properties": {
           "id": {
@@ -2518,6 +2613,104 @@
         ],
         "title": "SiteCurrentResponse"
       },
+      "SitePredictionResponse": {
+        "properties": {
+          "target_at": {
+            "type": "string",
+            "format": "date-time",
+            "title": "Target At"
+          },
+          "target_metric": {
+            "$ref": "#/components/schemas/PredictionTargetMetric"
+          },
+          "period_minutes": {
+            "anyOf": [
+              {
+                "type": "integer"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Period Minutes"
+          },
+          "predicted_value": {
+            "anyOf": [
+              {
+                "type": "number"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Predicted Value"
+          },
+          "status": {
+            "$ref": "#/components/schemas/PredictionStatus"
+          },
+          "failure_reason": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Failure Reason"
+          },
+          "model_reference": {
+            "type": "string",
+            "title": "Model Reference"
+          },
+          "created_at": {
+            "type": "string",
+            "format": "date-time",
+            "title": "Created At"
+          }
+        },
+        "type": "object",
+        "required": [
+          "target_at",
+          "target_metric",
+          "period_minutes",
+          "predicted_value",
+          "status",
+          "failure_reason",
+          "model_reference",
+          "created_at"
+        ],
+        "title": "SitePredictionResponse"
+      },
+      "SitePredictionSummaryResponse": {
+        "properties": {
+          "site_id": {
+            "type": "string",
+            "title": "Site Id"
+          },
+          "site_name": {
+            "type": "string",
+            "title": "Site Name"
+          },
+          "prediction": {
+            "anyOf": [
+              {
+                "$ref": "#/components/schemas/SitePredictionResponse"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          }
+        },
+        "type": "object",
+        "required": [
+          "site_id",
+          "site_name",
+          "prediction"
+        ],
+        "title": "SitePredictionSummaryResponse"
+      },
       "SiteResponse": {
         "properties": {
           "site_id": {
@@ -2973,6 +3166,10 @@
     {
       "name": "sensors",
       "description": "État de santé des capteurs par site. Réservé au rôle `admin`."
+    },
+    {
+      "name": "predictions",
+      "description": "Dernière prévision de consommation par site, calculée hors ligne par le pipeline de scoring (`ml/`) et simplement lue ici. Accessible à partir du rôle `lecteur`."
     }
   ]
 }

apps/backend/tests/api/acces.py

@@ -0,0 +1,87 @@
+# Pourquoi : classification unique des routes du contrat, lue par test_route_protection.py,
+# test_openapi.py et test_matrice_acces.py. Trois listes séparées dérivaient auparavant chacune
+# de leur côté, et deux entrées de ROUTES_A_ROLE ne correspondaient plus à aucune route sans que
+# rien ne le signale.
+# Piège : les trois ensembles doivent rester disjoints et couvrir tout le schéma. C'est
+# `test_every_declared_route_is_classified` qui le vérifie, pas la relecture.
+
+from typing import Final
+
+from app.core.roles import Role
+
+Route = tuple[str, str]
+
+ROUTES_PUBLIQUES: Final[frozenset[Route]] = frozenset(
+    {
+        ("GET", "/api/v1/health/live"),
+        ("GET", "/api/v1/health/ready"),
+        ("POST", "/api/v1/auth/login"),
+        # Sans cookie, la déconnexion ne fait rien et répond 204 : elle est idempotente.
+        ("POST", "/api/v1/auth/logout"),
+        ("POST", "/api/v1/auth/forgot-password"),
+        # Protégée par le jeton dans le corps de la requête, pas par un `Principal` : aucune
+        # authentification préalable ne s'applique, c'est la validité du jeton qui tranche.
+        ("POST", "/api/v1/auth/reset-password"),
+        # Même raison : lecture seule, protégée par le jeton passé en paramètre, pas par un
+        # `Principal`. Le jeton est un secret de 256 bits, non brute-forçable.
+        ("GET", "/api/v1/auth/reset-password/validate"),
+        ("GET", "/metrics"),
+    }
+)
+
+# Le cookie opaque porte seul l'autorisation : sans lui la route rend 401, mais aucun `Principal`
+# n'est construit et `require_role` n'entre jamais en jeu.
+ROUTE_COOKIE: Final[frozenset[Route]] = frozenset({("POST", "/api/v1/auth/refresh")})
+
+# Authentifiées par `CurrentPrincipalDep` nu, donc hors de `require_role` et, avec lui, hors du
+# refus `password_change_required`. Volontaire pour `/auth/password`, qui est la sortie de l'état
+# provisoire ; subi pour `/auth/logout-all`, cf. test_matrice_acces.py.
+ROUTES_SANS_ROLE: Final[frozenset[Route]] = frozenset(
+    {
+        ("GET", "/api/v1/auth/me"),
+        ("POST", "/api/v1/auth/password"),
+        ("POST", "/api/v1/auth/logout-all"),
+    }
+)
+
+ROLE_MINIMUM: Final[dict[Route, Role]] = {
+    ("GET", "/api/v1/sites"): Role.LECTEUR,
+    ("GET", "/api/v1/sites/{site_id}"): Role.LECTEUR,
+    ("GET", "/api/v1/sites/{site_id}/current"): Role.LECTEUR,
+    ("GET", "/api/v1/alerts"): Role.LECTEUR,
+    ("GET", "/api/v1/recommendations"): Role.LECTEUR,
+    ("GET", "/api/v1/recommendations/{recommendation_id}"): Role.LECTEUR,
+    ("GET", "/api/v1/stats/summary"): Role.LECTEUR,
+    ("GET", "/api/v1/readings"): Role.LECTEUR,
+    ("GET", "/api/v1/predictions"): Role.LECTEUR,
+    ("GET", "/api/v1/sensors/status"): Role.ADMIN,
+    ("GET", "/api/v1/users"): Role.ADMIN,
+    ("POST", "/api/v1/users"): Role.ADMIN,
+    ("PATCH", "/api/v1/users/{user_id}"): Role.ADMIN,
+    ("POST", "/api/v1/users/{user_id}/password-reset"): Role.ADMIN,
+}
+
+# Piège : `{recommendation_id}` est typé `int` et `{user_id}` est un UUID. Une substitution
+# uniforme par une chaîne quelconque rendrait 422 avant d'atteindre la garde de rôle, et le test
+# passerait en prouvant autre chose que ce qu'il annonce.
+SUBSTITUTIONS: Final[dict[str, str]] = {
+    "{user_id}": "00000000-0000-0000-0000-000000000000",
+    "{site_id}": "site-absent-du-jeu-de-donnees",
+    "{recommendation_id}": "999999999",
+}
+
+
+def chemin_concret(chemin: str) -> str:
+    for gabarit, valeur in SUBSTITUTIONS.items():
+        chemin = chemin.replace(gabarit, valeur)
+    return chemin
+
+
+def routes_du_schema(schema: dict[str, object]) -> list[Route]:
+    chemins: dict[str, dict[str, object]] = schema["paths"]  # type: ignore[assignment]
+    return [
+        (methode.upper(), chemin)
+        for chemin, operations in chemins.items()
+        for methode in operations
+        if methode.upper() in {"GET", "POST", "PATCH", "PUT", "DELETE"}
+    ]

apps/backend/tests/api/test_matrice_acces.py

@@ -0,0 +1,279 @@
+# Pourquoi : la matrice rôle x route sur les routes réelles. `test_authorization.py` la joue déjà,
+# mais contre une route jetable montée par une fixture, ce qui ne dit rien du niveau effectivement
+# posé sur `/sites` ou `/users`. `ROLE_MINIMUM` (tests/api/acces.py) est la référence, et ce
+# fichier est ce qui la confronte au comportement observé.
+# Piège : l'assertion porte sur le refus de la garde, pas sur un 200. Un rôle suffisant peut
+# légitimement recevoir 404 ou 422 selon les données ; ce qui compte est qu'il ne reçoive pas le
+# 403 `Droits insuffisants`. Sans cette nuance, le test dépendrait du contenu de la base.
+# Les tests `integration` en fin de fichier rejouent la même matrice avec de vrais jetons, donc en
+# traversant le décodage du JWT et la relecture du compte, ce que l'override court-circuite.
+
+import uuid
+from collections.abc import AsyncIterator, Callable, Iterator
+
+import pytest
+from fastapi import FastAPI
+from httpx import AsyncClient, Response
+from sqlalchemy import text
+
+from app.api.deps import get_current_principal
+from app.core.hashing import build_hasher
+from app.core.principal import Principal
+from app.core.roles import AccountKind, Role, has_at_least
+from app.db.session import get_session, get_session_factory
+from app.repositories.user import UserRepository
+from tests.api.acces import ROLE_MINIMUM, chemin_concret
+
+ROLES = [Role.LECTEUR, Role.OPERATEUR, Role.ADMIN]
+IDS_DE_ROLE = ["lecteur", "operateur", "admin"]
+REFUS_DE_DROITS = "Droits insuffisants"
+REFUS_DE_MOT_DE_PASSE = "password_change_required"
+MOT_DE_PASSE = "un-mot-de-passe-de-recette"
+
+
+# `FakeSession` de tests/factories.py rend un unique objet pour les trois formes d'appel, ce qui
+# suffit à un test d'endpoint ciblé mais pas à balayer 13 routes qui interrogent chacune la base
+# à sa façon. Ce double rend un résultat vide quelle que soit la forme demandée, pour que la
+# réponse observée vienne de la garde de rôle et jamais d'un double mal ajusté.
+class ResultatVide:
+    def scalars(self) -> ResultatVide:
+        return self
+
+    def all(self) -> list[object]:
+        return []
+
+    def first(self) -> None:
+        return None
+
+    def one_or_none(self) -> None:
+        return None
+
+    def scalar_one_or_none(self) -> None:
+        return None
+
+    def mappings(self) -> ResultatVide:
+        return self
+
+    def __iter__(self) -> Iterator[object]:
+        return iter(())
+
+
+class SessionMuette:
+    async def scalar(self, *_: object, **__: object) -> None:
+        return None
+
+    async def execute(self, *_: object, **__: object) -> ResultatVide:
+        return ResultatVide()
+
+    async def scalars(self, *_: object, **__: object) -> ResultatVide:
+        return ResultatVide()
+
+    async def get(self, *_: object, **__: object) -> None:
+        return None
+
+    async def flush(self) -> None:
+        return None
+
+    async def commit(self) -> None:
+        return None
+
+    async def rollback(self) -> None:
+        return None
+
+    def add(self, *_: object, **__: object) -> None:
+        return None
+
+
+@pytest.fixture
+def base_muette(app: FastAPI) -> None:
+    async def override() -> AsyncIterator[SessionMuette]:
+        yield SessionMuette()
+
+    app.dependency_overrides[get_session] = override
+
+
+def principal(role: Role, *, must_change_password: bool = False) -> Principal:
+    return Principal(
+        id=uuid.uuid4(),
+        email=f"matrice-{role.value}@enervision.fr",
+        role=role,
+        kind=AccountKind.HUMAIN,
+        must_change_password=must_change_password,
+    )
+
+
+@pytest.fixture
+def connecte(app: FastAPI) -> Iterator[Callable[[Principal], None]]:
+    def installe(acteur: Principal) -> None:
+        app.dependency_overrides[get_current_principal] = lambda: acteur
+
+    yield installe
+    app.dependency_overrides.pop(get_current_principal, None)
+
+
+async def appelle(client: AsyncClient, methode: str, chemin: str, **kwargs: object) -> Response:
+    return await client.request(methode, chemin_concret(chemin), json={}, **kwargs)  # type: ignore[arg-type]
+
+
+def motif_du_refus(response: Response) -> str | None:
+    if response.status_code != 403:
+        return None
+    detail = response.json().get("detail")
+    return detail if isinstance(detail, str) else None
+
+
+@pytest.mark.parametrize("role", ROLES, ids=IDS_DE_ROLE)
+async def test_a_role_below_the_minimum_is_refused_on_every_guarded_route(
+    connecte: Callable[[Principal], None],
+    client: AsyncClient,
+    base_muette: None,
+    role: Role,
+) -> None:
+    connecte(principal(role))
+    laissees_passer: list[tuple[str, str, int]] = []
+
+    for (methode, chemin), minimum in ROLE_MINIMUM.items():
+        if has_at_least(role, minimum):
+            continue
+        response = await appelle(client, methode, chemin)
+        if motif_du_refus(response) != REFUS_DE_DROITS:
+            laissees_passer.append((methode, chemin, response.status_code))
+
+    assert laissees_passer == []
+
+
+# Le pendant du test précédent : sans lui, une garde posée trop haut, par exemple `AdminDep` sur
+# `/sites`, ne ferait échouer aucun test du dépôt.
+@pytest.mark.parametrize("role", ROLES, ids=IDS_DE_ROLE)
+async def test_a_role_at_or_above_the_minimum_is_never_refused_by_the_guard(
+    connecte: Callable[[Principal], None],
+    client: AsyncClient,
+    base_muette: None,
+    role: Role,
+) -> None:
+    connecte(principal(role))
+    refusees: list[tuple[str, str]] = []
+
+    for (methode, chemin), minimum in ROLE_MINIMUM.items():
+        if not has_at_least(role, minimum):
+            continue
+        response = await appelle(client, methode, chemin)
+        if motif_du_refus(response) == REFUS_DE_DROITS:
+            refusees.append((methode, chemin))
+
+    assert refusees == []
+
+
+async def test_a_pending_password_change_is_refused_on_every_guarded_route(
+    connecte: Callable[[Principal], None],
+    client: AsyncClient,
+    base_muette: None,
+) -> None:
+    connecte(principal(Role.ADMIN, must_change_password=True))
+    laissees_passer: list[tuple[str, str, int]] = []
+
+    for methode, chemin in ROLE_MINIMUM:
+        response = await appelle(client, methode, chemin)
+        if motif_du_refus(response) != REFUS_DE_MOT_DE_PASSE:
+            laissees_passer.append((methode, chemin, response.status_code))
+
+    assert laissees_passer == []
+
+
+@pytest.fixture
+async def comptes_par_role() -> AsyncIterator[dict[Role, str]]:
+    marque = uuid.uuid4().hex[:12]
+    hacheur = build_hasher(time_cost=1, memory_cost_kib=8192, parallelism=1, max_concurrency=2)
+    empreinte = await hacheur.hash(MOT_DE_PASSE)
+    adresses = {role: f"matrice-{marque}-{role.value}@enervision.fr" for role in ROLES}
+
+    async with get_session_factory()() as session:
+        depot = UserRepository(session)
+        for role, email in adresses.items():
+            await depot.create(email=email, password_hash=empreinte, role=role)
+        await session.commit()
+
+    yield adresses
+
+    async with get_session_factory()() as session:
+        await session.execute(
+            text("delete from app_user where email like :motif"), {"motif": f"matrice-{marque}-%"}
+        )
+        await session.commit()
+
+
+async def authentifie(client: AsyncClient, email: str) -> dict[str, str]:
+    reponse = await client.post(
+        "/api/v1/auth/login", json={"email": email, "password": MOT_DE_PASSE}
+    )
+    assert reponse.status_code == 200, reponse.text
+    return {"Authorization": f"Bearer {reponse.json()['access_token']}"}
+
+
+@pytest.mark.integration
+@pytest.mark.parametrize("role", ROLES, ids=IDS_DE_ROLE)
+async def test_a_real_token_reaches_exactly_the_routes_of_its_rank(
+    comptes_par_role: dict[Role, str], client: AsyncClient, role: Role
+) -> None:
+    entetes = await authentifie(client, comptes_par_role[role])
+    ecarts: list[tuple[str, str, int, str]] = []
+
+    for (methode, chemin), minimum in ROLE_MINIMUM.items():
+        response = await appelle(client, methode, chemin, headers=entetes)
+        refuse = motif_du_refus(response) == REFUS_DE_DROITS
+        if refuse is has_at_least(role, minimum):
+            ecarts.append((methode, chemin, response.status_code, response.text[:120]))
+
+    assert ecarts == []
+
+
+# Contrainte : `operateur` n'ouvre aujourd'hui aucune route de plus que `lecteur`, faute d'écriture
+# métier dans l'API. Figer l'égalité rend la régression visible le jour où une route d'opérateur
+# arrive sans que `ROLE_MINIMUM` soit mis à jour.
+@pytest.mark.integration
+async def test_the_operator_rank_opens_nothing_more_than_the_reader_rank(
+    comptes_par_role: dict[Role, str], client: AsyncClient
+) -> None:
+    lecteur = await authentifie(client, comptes_par_role[Role.LECTEUR])
+    operateur = await authentifie(client, comptes_par_role[Role.OPERATEUR])
+    divergences: list[tuple[str, str]] = []
+
+    for methode, chemin in ROLE_MINIMUM:
+        cote_lecteur = await appelle(client, methode, chemin, headers=lecteur)
+        cote_operateur = await appelle(client, methode, chemin, headers=operateur)
+        if cote_lecteur.status_code != cote_operateur.status_code:
+            divergences.append((methode, chemin))
+
+    assert divergences == []
+
+
+# Piège : `/auth/logout-all` prend un `CurrentPrincipalDep` nu, donc elle échappe au gate
+# `must_change_password` que seul `require_role` applique. Comportement figé ici, pas corrigé.
+@pytest.mark.integration
+async def test_a_temporary_password_blocks_the_business_routes_but_not_logout_all(
+    client: AsyncClient,
+) -> None:
+    marque = uuid.uuid4().hex[:12]
+    email = f"matrice-{marque}-provisoire@enervision.fr"
+    hacheur = build_hasher(time_cost=1, memory_cost_kib=8192, parallelism=1, max_concurrency=2)
+    empreinte = await hacheur.hash(MOT_DE_PASSE)
+
+    async with get_session_factory()() as session:
+        await UserRepository(session).create(
+            email=email, password_hash=empreinte, role=Role.ADMIN, must_change_password=True
+        )
+        await session.commit()
+
+    try:
+        entetes = await authentifie(client, email)
+        sites = await client.get("/api/v1/sites", headers=entetes)
+        identite = await client.get("/api/v1/auth/me", headers=entetes)
+        fermeture = await client.post("/api/v1/auth/logout-all", headers=entetes)
+
+        assert motif_du_refus(sites) == REFUS_DE_MOT_DE_PASSE
+        assert identite.status_code == 200
+        assert fermeture.status_code == 204
+    finally:
+        async with get_session_factory()() as session:
+            await session.execute(text("delete from app_user where email = :e"), {"e": email})
+            await session.commit()

apps/backend/tests/api/test_openapi.py

@@ -8,6 +8,7 @@ from typing import Any
 import pytest
 
 from app import cli
+from tests.api.acces import ROLE_MINIMUM
 
 METHODES = {"get", "post", "patch", "put", "delete"}
 
@@ -24,21 +25,11 @@ ORIGINE_VERIFIEE = {
 
 # 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"),
-}
+# Piège : cette liste était recopiée ici, et deux de ses entrées portaient `{id}` là où le contrat
+# expose `{user_id}`. Elles ne correspondaient donc à aucune opération, et le test ci-dessous
+# passait au vert sans rien vérifier sur ces deux routes. Elle est maintenant dérivée, et
+# `test_every_declared_route_is_classified` interdit l'entrée morte.
+ROUTES_A_ROLE = frozenset(ROLE_MINIMUM)
 
 
 @pytest.fixture(scope="module")

apps/backend/tests/api/test_predictions.py

@@ -0,0 +1,85 @@
+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_prediction_service
+from app.core.principal import Principal
+from app.core.roles import AccountKind, Role
+from app.services.prediction import PredictionSummary, SitePrediction, SitePredictionSummary
+
+TARGET_AT = datetime(2026, 9, 16, 13, 0, tzinfo=UTC)
+CREATED_AT = datetime(2026, 9, 16, 12, 0, tzinfo=UTC)
+
+
+def lecteur() -> Principal:
+    # Le garde-fou de rôle (`lecteur` minimum) est déjà couvert par l'ensemble `ROUTES_A_ROLE`
+    # de `tests/api/test_openapi.py` : pas besoin ici d'un paramètre de rôle jamais appelé avec
+    # autre chose que sa valeur par défaut.
+    return Principal(
+        id=uuid4(),
+        email="lecteur@enervision.fr",
+        role=Role.LECTEUR,
+        kind=AccountKind.HUMAIN,
+        must_change_password=False,
+    )
+
+
+class FauxService:
+    def __init__(self) -> None:
+        self.resume = PredictionSummary(
+            timestamp=datetime.now(UTC),
+            sites=[
+                SitePredictionSummary(
+                    site_id="SITE001",
+                    site_name="Bureau Paris La Défense",
+                    prediction=SitePrediction(
+                        target_at=TARGET_AT,
+                        target_metric="consumption_kwh",
+                        period_minutes=60,
+                        predicted_value=812.5,
+                        status="available",
+                        failure_reason=None,
+                        model_reference="lightgbm-abc123",
+                        created_at=CREATED_AT,
+                    ),
+                ),
+                SitePredictionSummary(site_id="SITE002", site_name="Usine Lyon", prediction=None),
+            ],
+        )
+
+    async def summary(self) -> PredictionSummary:
+        return self.resume
+
+
+@pytest.fixture
+def servi(app: FastAPI) -> Iterator[Callable[[], FauxService]]:
+    def installe() -> FauxService:
+        service = FauxService()
+        app.dependency_overrides[get_prediction_service] = lambda: service
+        app.dependency_overrides[get_current_principal] = lambda: lecteur()
+        return service
+
+    yield installe
+    app.dependency_overrides.pop(get_prediction_service, None)
+    app.dependency_overrides.pop(get_current_principal, None)
+
+
+async def test_get_predictions_returns_the_service_result(
+    servi: Callable[[], FauxService], client: AsyncClient
+) -> None:
+    servi()
+
+    response = await client.get("/api/v1/predictions")
+
+    assert response.status_code == 200
+    corps = response.json()
+    premier, second = corps["sites"]
+    assert premier["site_id"] == "SITE001"
+    assert premier["prediction"]["predicted_value"] == 812.5
+    assert premier["prediction"]["status"] == "available"
+    assert second["site_id"] == "SITE002"
+    assert second["prediction"] is None

apps/backend/tests/api/test_route_protection.py

@@ -1,6 +1,6 @@
 # Ce test est le garde-fou de l'autorisation : rendre une route publique oblige à modifier
-# `ROUTES_PUBLIQUES` ci-dessous, ce qui apparaît en clair dans la diff d'une pull request et
-# demande une justification au relecteur.
+# `ROUTES_PUBLIQUES` dans `tests/api/acces.py`, ce qui apparaît en clair dans la diff d'une pull
+# request et demande une justification au relecteur.
 # Pourquoi : il interroge réellement chaque route sans jeton au lieu d'inspecter l'arbre de
 # dépendances. L'arbre n'est accessible que par l'API privée de FastAPI, et surtout une route
 # peut porter la bonne dépendance tout en répondant quand même.
@@ -11,58 +11,64 @@ import pytest
 from fastapi import FastAPI
 from httpx import AsyncClient
 
-ROUTES_PUBLIQUES = frozenset(
-    {
-        ("GET", "/api/v1/health/live"),
-        ("GET", "/api/v1/health/ready"),
-        ("POST", "/api/v1/auth/login"),
-        # Sans cookie, la déconnexion ne fait rien et répond 204 : elle est idempotente.
-        ("POST", "/api/v1/auth/logout"),
-        ("POST", "/api/v1/auth/forgot-password"),
-        # Protégée par le jeton dans le corps de la requête, pas par un `Principal` : aucune
-        # authentification préalable ne s'applique, c'est la validité du jeton qui tranche.
-        ("POST", "/api/v1/auth/reset-password"),
-        # Même raison : lecture seule, protégée par le jeton passé en paramètre, pas par un
-        # `Principal`. Le jeton est un secret de 256 bits, non brute-forçable.
-        ("GET", "/api/v1/auth/reset-password/validate"),
-        ("GET", "/metrics"),
-    }
+from tests.api.acces import (
+    ROLE_MINIMUM,
+    ROUTE_COOKIE,
+    ROUTES_PUBLIQUES,
+    ROUTES_SANS_ROLE,
+    Route,
+    chemin_concret,
+    routes_du_schema,
 )
 
-VALEURS_DE_SUBSTITUTION = "00000000-0000-0000-0000-000000000000"
 STATUTS_DE_REFUS = {401, 403}
+HORS_SCHEMA = {("GET", "/metrics")}
 
 
-def routes_declarees(app: FastAPI) -> list[tuple[str, str]]:
+def routes_declarees(app: FastAPI) -> list[Route]:
     schema: dict[str, Any] = app.openapi()
-    return [
-        (methode.upper(), chemin)
-        for chemin, operations in schema["paths"].items()
-        for methode in operations
-        if methode.upper() in {"GET", "POST", "PATCH", "PUT", "DELETE"}
-    ]
+    return routes_du_schema(schema)
 
 
-def routes_protegees(app: FastAPI) -> list[tuple[str, str]]:
+def routes_protegees(app: FastAPI) -> list[Route]:
     return [route for route in routes_declarees(app) if route not in ROUTES_PUBLIQUES]
 
 
 def test_the_public_allow_list_has_no_stale_entry(app: FastAPI) -> None:
-    declarees = set(routes_declarees(app)) | {("GET", "/metrics")}
+    declarees = set(routes_declarees(app)) | HORS_SCHEMA
 
     inconnues = ROUTES_PUBLIQUES - declarees
 
     assert inconnues == set()
 
 
+# Sans lui, une route ajoutée sans être classée n'est vue par aucun test de rôle : elle hérite
+# du seul contrôle anonyme, et une garde posée au mauvais niveau passe inaperçue.
+def test_every_declared_route_is_classified(app: FastAPI) -> None:
+    classees = ROUTES_PUBLIQUES | ROUTE_COOKIE | ROUTES_SANS_ROLE | set(ROLE_MINIMUM)
+
+    non_classees = set(routes_declarees(app)) - classees
+    fantomes = classees - set(routes_declarees(app)) - HORS_SCHEMA
+
+    assert non_classees == set(), "classer la route dans tests/api/acces.py"
+    assert fantomes == set(), "entrée morte : la route n'existe plus sous ce chemin"
+
+
+def test_the_four_classes_of_routes_stay_disjoint() -> None:
+    classes = [ROUTES_PUBLIQUES, ROUTE_COOKIE, ROUTES_SANS_ROLE, frozenset(ROLE_MINIMUM)]
+
+    for rang, classe in enumerate(classes):
+        for autre in classes[rang + 1 :]:
+            assert classe & autre == frozenset()
+
+
 async def test_every_route_rejects_an_anonymous_caller_unless_explicitly_public(
     app: FastAPI, client: AsyncClient
 ) -> None:
     ouvertes: list[tuple[str, str, int]] = []
 
     for methode, chemin in routes_protegees(app):
-        concret = chemin.replace("{user_id}", VALEURS_DE_SUBSTITUTION)
-        response = await client.request(methode, concret, json={})
+        response = await client.request(methode, chemin_concret(chemin), json={})
         if response.status_code not in STATUTS_DE_REFUS:
             ouvertes.append((methode, chemin, response.status_code))
 
@@ -95,4 +101,5 @@ async def test_the_documentation_routes_are_public_by_design(
     app: FastAPI, client: AsyncClient, chemin: str
 ) -> None:
     response = await client.get(chemin)
+
     assert response.status_code == 200

apps/backend/tests/repositories/test_prediction.py

@@ -0,0 +1,92 @@
+from datetime import UTC, datetime
+
+import pytest
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.energy import Prediction
+from app.repositories.prediction import PredictionRepository
+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_prediction(
+    session: AsyncSession, *, site_id: str, **overrides: object
+) -> Prediction:
+    prediction = Prediction(
+        site_id=site_id,
+        target_at=overrides.get("target_at", datetime(2026, 9, 16, tzinfo=UTC)),
+        target_metric=overrides.get("target_metric", "consumption_kwh"),
+        period_minutes=overrides.get("period_minutes", 60),
+        predicted_value=overrides.get("predicted_value", 42.0),
+        model_reference=overrides.get("model_reference", "lightgbm-test"),
+        status=overrides.get("status", "available"),
+        failure_reason=overrides.get("failure_reason"),
+    )
+    session.add(prediction)
+    await session.flush()
+    return prediction
+
+
+async def test_latest_by_site_keeps_only_the_most_recent_target(session: AsyncSession) -> None:
+    site = await creer_site(session)
+    depot = PredictionRepository(session)
+    ancienne = await creer_prediction(
+        session, site_id=site.site_id, target_at=datetime(2026, 9, 1, tzinfo=UTC)
+    )
+    recente = await creer_prediction(
+        session, site_id=site.site_id, target_at=datetime(2026, 9, 15, tzinfo=UTC)
+    )
+
+    resultats = await depot.latest_by_site()
+    identifiants = [
+        p.prediction_id
+        for p in resultats
+        if p.prediction_id in (ancienne.prediction_id, recente.prediction_id)
+    ]
+    await session.rollback()
+
+    assert identifiants == [recente.prediction_id]
+
+
+async def test_latest_by_site_returns_one_row_per_site(session: AsyncSession) -> None:
+    premier = await creer_site(session)
+    second = await creer_site(session)
+    depot = PredictionRepository(session)
+    voulue_premier = await creer_prediction(session, site_id=premier.site_id)
+    voulue_second = await creer_prediction(session, site_id=second.site_id)
+
+    resultats = await depot.latest_by_site()
+    identifiants = {p.site_id for p in resultats if p.site_id in (premier.site_id, second.site_id)}
+    await session.rollback()
+
+    assert identifiants == {voulue_premier.site_id, voulue_second.site_id}
+
+
+async def test_latest_by_site_keeps_an_insufficient_data_prediction(session: AsyncSession) -> None:
+    site = await creer_site(session)
+    depot = PredictionRepository(session)
+    voulue = await creer_prediction(
+        session,
+        site_id=site.site_id,
+        status="insufficient_data",
+        predicted_value=None,
+        failure_reason="pas assez d'historique",
+    )
+
+    resultats = await depot.latest_by_site()
+    identifiants = [p.prediction_id for p in resultats if p.site_id == site.site_id]
+    await session.rollback()
+
+    assert identifiants == [voulue.prediction_id]
+
+
+async def test_latest_by_site_returns_an_empty_list_when_there_is_nothing(
+    session: AsyncSession,
+) -> None:
+    depot = PredictionRepository(session)
+
+    resultats = [p for p in await depot.latest_by_site() if p.site_id == identifiant_site()]
+
+    assert resultats == []

apps/backend/tests/services/test_prediction.py

@@ -0,0 +1,121 @@
+from dataclasses import dataclass
+from datetime import UTC, datetime
+
+from app.services.prediction import PredictionService
+
+TARGET_AT = datetime(2026, 9, 16, 13, 0, tzinfo=UTC)
+CREATED_AT = datetime(2026, 9, 16, 12, 0, tzinfo=UTC)
+
+
+@dataclass
+class FauxSite:
+    site_id: str
+    site_name: str
+
+
+@dataclass
+class FauxPrediction:
+    site_id: str
+    target_at: datetime
+    target_metric: str
+    period_minutes: int | None
+    predicted_value: float | None
+    status: str
+    failure_reason: str | None
+    model_reference: str
+    created_at: datetime
+
+
+class FauxDepotSites:
+    def __init__(self, sites: list[FauxSite]) -> None:
+        self._sites = sites
+
+    async def list_all(self) -> list[FauxSite]:
+        return self._sites
+
+
+class FauxDepotPredictions:
+    def __init__(self, predictions: list[FauxPrediction]) -> None:
+        self._predictions = predictions
+
+    async def latest_by_site(self) -> list[FauxPrediction]:
+        return self._predictions
+
+
+def prediction_disponible(site_id: str = "A") -> FauxPrediction:
+    return FauxPrediction(
+        site_id=site_id,
+        target_at=TARGET_AT,
+        target_metric="consumption_kwh",
+        period_minutes=60,
+        predicted_value=812.5,
+        status="available",
+        failure_reason=None,
+        model_reference="lightgbm-abc123",
+        created_at=CREATED_AT,
+    )
+
+
+async def test_summary_attaches_the_latest_prediction_to_its_site() -> None:
+    service = PredictionService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        predictions=FauxDepotPredictions([prediction_disponible("A")]),  # type: ignore[arg-type]
+    )
+
+    resume = await service.summary()
+
+    site = resume.sites[0]
+    assert site.site_id == "A"
+    assert site.prediction is not None
+    assert site.prediction.predicted_value == 812.5
+    assert site.prediction.status == "available"
+
+
+async def test_summary_leaves_prediction_none_for_a_site_never_scored() -> None:
+    service = PredictionService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        predictions=FauxDepotPredictions([]),  # type: ignore[arg-type]
+    )
+
+    resume = await service.summary()
+
+    assert resume.sites[0].prediction is None
+
+
+async def test_summary_carries_an_insufficient_data_prediction_without_a_value() -> None:
+    insuffisante = FauxPrediction(
+        site_id="A",
+        target_at=TARGET_AT,
+        target_metric="consumption_kwh",
+        period_minutes=60,
+        predicted_value=None,
+        status="insufficient_data",
+        failure_reason="pas assez d'historique",
+        model_reference="lightgbm-abc123",
+        created_at=CREATED_AT,
+    )
+    service = PredictionService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        predictions=FauxDepotPredictions([insuffisante]),  # type: ignore[arg-type]
+    )
+
+    resume = await service.summary()
+
+    site = resume.sites[0]
+    assert site.prediction is not None
+    assert site.prediction.status == "insufficient_data"
+    assert site.prediction.predicted_value is None
+    assert site.prediction.failure_reason == "pas assez d'historique"
+
+
+async def test_summary_covers_every_site_even_with_a_single_prediction_in_the_repository() -> None:
+    service = PredictionService(
+        sites=FauxDepotSites([FauxSite("A", "Site A"), FauxSite("B", "Site B")]),  # type: ignore[arg-type]
+        predictions=FauxDepotPredictions([prediction_disponible("A")]),  # type: ignore[arg-type]
+    )
+
+    resume = await service.summary()
+
+    par_site = {site.site_id: site for site in resume.sites}
+    assert par_site["A"].prediction is not None
+    assert par_site["B"].prediction is None

apps/frontend/sonar-project.properties

@@ -0,0 +1,18 @@
+sonar.projectKey=ProjetPiscine_EnerVision
+sonar.organization=groupe3-ener-vision
+sonar.sourceEncoding=UTF-8
+
+#  Dossier contenant le code source
+sonar.sources=apps/frontend/src,apps/backend/app
+sonar.tests=apps/backend/tests
+
+#  Liste des fichiers et dossiers à exclure de l'analyse
+#  Liste des fichiers et dossiers à exclure de l'analyse
+sonar.exclusions=**/node_modules/**,**/dist/**,**/*.spec.js,**/*.test.js,github,db,ml,docker-compose.yml,**/**/Dockerfile,**/**/proxy.conf.json,**/**/package.json,**/**/angular.json
+
+#  Chemin vers le rapport de couverture de code
+#  Fichier généré par Vitest
+#  Chemin vers le rapport de couverture de code
+#  Fichier généré par Vitest
+sonar.javascript.lcov.reportPaths=apps/frontend/coverage/frontend/lcov.info
+sonar.python.coverage.reportPaths=apps/backend/cov.info

apps/frontend/src/app/app.routes.ts

@@ -21,9 +21,7 @@ export const routes: Routes = [
     path: 'sites/:siteId',
     canActivate: [authGuard],
     loadComponent: () =>
-      import('./features/sites/site-detail-placeholder/site-detail-placeholder').then(
-        (m) => m.SiteDetailPlaceholder,
-      ),
+      import('./features/sites/site-detail/site-detail').then((m) => m.SiteDetail),
   },
   {
   path: 'monitoring/sensors',

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

@@ -64,4 +64,13 @@ describe('mockApiInterceptor', () => {
     httpMock.expectNone(`${environment.apiUrl}/alerts`);
     expect((result as unknown[]).length).toBeGreaterThan(0);
   });
+
+  it('laisse toujours passer /predictions vers le réseau, même avec useMockFixtures activé', () => {
+    environment.useMockFixtures = true;
+
+    http.get(`${environment.apiUrl}/predictions`).subscribe();
+
+    const req = httpMock.expectOne(`${environment.apiUrl}/predictions`);
+    req.flush({ timestamp: '2026-09-18T09:00:00Z', sites: [] });
+  });
 });

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

@@ -26,5 +26,7 @@ export const mockApiInterceptor: HttpInterceptorFn = (req, next) => {
   if (req.url.endsWith(`${environment.apiUrl}/alerts`)) {
     return of(new HttpResponse({ status: 200, body: ALERTS_FIXTURE }));
   }
+  // Volontairement jamais mocké, contrairement à `stats`/`alerts` : les prévisions sont servies
+  // par l'API réelle dès maintenant (au même titre que `/auth/*`, déjà toujours réel).
   return next(req);
 };

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

@@ -0,0 +1,35 @@
+import { TestBed } from '@angular/core/testing';
+import { provideHttpClient } from '@angular/common/http';
+import { provideHttpClientTesting, HttpTestingController } from '@angular/common/http/testing';
+import { PredictionsService } from './predictions.service';
+import { environment } from '../../../environments/environment';
+
+describe('PredictionsService', () => {
+  let service: PredictionsService;
+  let httpMock: HttpTestingController;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [provideHttpClient(), provideHttpClientTesting()],
+    });
+    service = TestBed.inject(PredictionsService);
+    httpMock = TestBed.inject(HttpTestingController);
+  });
+
+  afterEach(() => httpMock.verify());
+
+  it('appelle le bon endpoint et retourne un résumé de prévisions', () => {
+    let result: unknown;
+    service.getPredictions().subscribe((r) => (result = r));
+
+    const req = httpMock.expectOne(`${environment.apiUrl}/predictions`);
+    expect(req.request.method).toBe('GET');
+
+    req.flush({
+      timestamp: '2026-09-18T09:00:00Z',
+      sites: [{ site_id: 'SITE001', site_name: 'Test', prediction: null }],
+    });
+
+    expect((result as { sites: unknown[] }).sites.length).toBe(1);
+  });
+});

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

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

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

@@ -0,0 +1,50 @@
+import { TestBed } from '@angular/core/testing';
+import { provideHttpClient } from '@angular/common/http';
+import { provideHttpClientTesting, HttpTestingController } from '@angular/common/http/testing';
+import { ReadingsService } from './readings.service';
+import { environment } from '../../../environments/environment';
+
+describe('ReadingsService', () => {
+  let service: ReadingsService;
+  let httpMock: HttpTestingController;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [provideHttpClient(), provideHttpClientTesting()],
+    });
+    service = TestBed.inject(ReadingsService);
+    httpMock = TestBed.inject(HttpTestingController);
+  });
+
+  afterEach(() => httpMock.verify());
+
+  it("demande l'historique du site avec la fenêtre temporelle donnée", () => {
+    let result: unknown;
+    service
+      .getHistory('SITE001', '2026-09-16T00:00:00Z', '2026-09-17T00:00:00Z')
+      .subscribe((r) => (result = r));
+
+    const req = httpMock.expectOne(
+      (r) => r.url === `${environment.apiUrl}/readings` && r.method === 'GET',
+    );
+    expect(req.request.params.get('site_id')).toBe('SITE001');
+    expect(req.request.params.get('start')).toBe('2026-09-16T00:00:00Z');
+    expect(req.request.params.get('end')).toBe('2026-09-17T00:00:00Z');
+
+    req.flush([{ reading_id: 1, site_id: 'SITE001', consumption_kw: 12.5 }]);
+
+    expect((result as unknown[]).length).toBe(1);
+  });
+
+  it('ne pose pas de paramètres start/end quand ils sont omis', () => {
+    service.getHistory('SITE001').subscribe();
+
+    const req = httpMock.expectOne(
+      (r) => r.url === `${environment.apiUrl}/readings` && r.method === 'GET',
+    );
+    expect(req.request.params.has('start')).toBe(false);
+    expect(req.request.params.has('end')).toBe(false);
+
+    req.flush([]);
+  });
+});

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

@@ -0,0 +1,20 @@
+import { Service, inject } from '@angular/core';
+import { HttpClient, HttpParams } from '@angular/common/http';
+import { environment } from '../../../environments/environment';
+import { Reading } from '../../shared/models/reading.model';
+
+@Service()
+export class ReadingsService {
+  private http = inject(HttpClient);
+
+  getHistory(siteId: string, start?: string, end?: string) {
+    let params = new HttpParams().set('site_id', siteId);
+    if (start) {
+      params = params.set('start', start);
+    }
+    if (end) {
+      params = params.set('end', end);
+    }
+    return this.http.get<Reading[]>(`${environment.apiUrl}/readings`, { params });
+  }
+}

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

@@ -38,4 +38,50 @@ describe('SitesService', () => {
 
     expect((result as { site_id: string }[])[0].site_id).toBe('SITE001');
   });
+
+  it('appelle le bon endpoint et retourne un site', () => {
+    let result: unknown;
+    service.getSite('SITE001').subscribe((r) => (result = r));
+
+    const req = httpMock.expectOne(`${environment.apiUrl}/sites/SITE001`);
+    expect(req.request.method).toBe('GET');
+
+    req.flush({
+      site_id: 'SITE001',
+      site_name: 'Site 1',
+      site_type: 'industriel',
+      location: 'Nantes',
+      capacity_kw: 500,
+      status: 'actif',
+    });
+
+    expect((result as { site_id: string }).site_id).toBe('SITE001');
+  });
+
+  it('appelle le bon endpoint et retourne la mesure courante du site', () => {
+    let result: unknown;
+    service.getCurrent('SITE001').subscribe((r) => (result = r));
+
+    const req = httpMock.expectOne(`${environment.apiUrl}/sites/SITE001/current`);
+    expect(req.request.method).toBe('GET');
+
+    req.flush({
+      timestamp: '2026-09-17T10:00:00Z',
+      site_id: 'SITE001',
+      site_type: 'industriel',
+      consumption_kw: 120,
+      consumption_kwh: null,
+      voltage_v: null,
+      current_a: null,
+      power_factor: null,
+      temperature_celsius: 22,
+      humidity_percent: 55,
+      null_reasons: ['electrical_sensor_failure'],
+      data_quality: 'partial',
+    });
+
+    expect((result as { null_reasons: string[] }).null_reasons).toEqual([
+      'electrical_sensor_failure',
+    ]);
+  });
 });

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

@@ -2,6 +2,7 @@ import { Service, inject } from '@angular/core';
 import { HttpClient } from '@angular/common/http';
 import { environment } from '../../../environments/environment';
 import { Site } from '../../shared/models/site.model';
+import { SiteCurrent } from '../../shared/models/site-current.model';
 
 @Service()
 export class SitesService {
@@ -10,4 +11,12 @@ export class SitesService {
   getSites() {
     return this.http.get<Site[]>(`${environment.apiUrl}/sites`);
   }
+
+  getSite(siteId: string) {
+    return this.http.get<Site>(`${environment.apiUrl}/sites/${siteId}`);
+  }
+
+  getCurrent(siteId: string) {
+    return this.http.get<SiteCurrent>(`${environment.apiUrl}/sites/${siteId}/current`);
+  }
 }

apps/frontend/src/app/features/dashboard/dashboard.html

@@ -24,7 +24,13 @@
     </div>
   </header>
 
-  @if (error(); as message) {
+  @if (statsError(); as message) {
+    <ev-alert severity="danger" class="banner-error">{{ message }}</ev-alert>
+  }
+  @if (alertsError(); as message) {
+    <ev-alert severity="danger" class="banner-error">{{ message }}</ev-alert>
+  }
+  @if (predictionsError(); as message) {
     <ev-alert severity="danger" class="banner-error">{{ message }}</ev-alert>
   }
 
@@ -75,4 +81,33 @@
       </ul>
     </section>
   }
+
+  @if (predictions().length > 0) {
+    <section class="predictions-section">
+      <h2>Prévisions de consommation</h2>
+      <ul class="predictions-list">
+        @for (site of predictions(); track site.site_id) {
+          <li class="prediction-item">
+            <span class="prediction-item__site">{{ site.site_name }}</span>
+            @if (site.prediction; as prediction) {
+              @if (prediction.status === 'available') {
+                <span class="prediction-item__value">
+                  {{ prediction.predicted_value | number: '1.0-1' }} kWh
+                  <span class="prediction-item__target"
+                    >{{ prediction.target_at | date: "dd/MM 'à' HH:mm" }}</span
+                  >
+                </span>
+              } @else {
+                <ev-badge [tone]="badgeToneForPredictionStatus(prediction.status)">{{
+                  prediction.status === 'insufficient_data' ? 'Historique insuffisant' : 'Erreur'
+                }}</ev-badge>
+              }
+            } @else {
+              <ev-badge tone="neutral">Pas encore de prévision</ev-badge>
+            }
+          </li>
+        }
+      </ul>
+    </section>
+  }
 </div>

apps/frontend/src/app/features/dashboard/dashboard.scss

@@ -130,3 +130,40 @@ h2 {
 .alert-item__message {
   font-size: 0.9rem;
 }
+
+.predictions-list {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+}
+
+.prediction-item {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 0.75rem;
+  padding: 0.7rem 1rem;
+  border-radius: var(--radius-md);
+  background: var(--color-surface);
+  border: 1px solid var(--color-border-light);
+}
+
+.prediction-item__site {
+  font-size: 0.9rem;
+  font-weight: 600;
+}
+
+.prediction-item__value {
+  font-size: 0.9rem;
+  font-weight: 600;
+}
+
+.prediction-item__target {
+  margin-left: 0.35rem;
+  font-size: 0.8rem;
+  font-weight: 400;
+  color: var(--color-text-muted);
+}

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

@@ -4,6 +4,7 @@ import { of, throwError } from 'rxjs';
 import { Dashboard } from './dashboard';
 import { StatsService } from '../../core/services/stats.service';
 import { AlertsService } from '../../core/services/alerts.service';
+import { PredictionsService } from '../../core/services/predictions.service';
 import {AuthService} from '../../core/services/auth.service';
 import {Router, provideRouter} from '@angular/router';
 
@@ -17,18 +18,24 @@ vi.mock('chart.js', () => {
   return { Chart: ChartMock, registerables: [] };
 });
 
+function predictionsMock(sites: unknown[] = []) {
+  return { getPredictions: vi.fn().mockReturnValue(of({ timestamp: '2026-09-18T09:00:00Z', sites })) };
+}
+
 describe('Dashboard', () => {
   afterEach(() => vi.useRealTimers());
 
-  it('charge les stats et les alertes au démarrage', async () => {
+  it('charge les stats, les alertes et les prévisions au démarrage', async () => {
     const statsMock = { getSummary: vi.fn().mockReturnValue(of({ total_sites: 7, sites: [] })) };
     const alertsMock = { getAlerts: vi.fn().mockReturnValue(of([{ alert_id: 'A1' }])) };
+    const predictions = predictionsMock([{ site_id: 'SITE001', site_name: 'Test', prediction: null }]);
 
     TestBed.configureTestingModule({
       imports: [Dashboard],
       providers: [
         { provide: StatsService, useValue: statsMock },
         { provide: AlertsService, useValue: alertsMock },
+        { provide: PredictionsService, useValue: predictions },
         provideRouter([]),
       ],
     });
@@ -42,8 +49,12 @@ describe('Dashboard', () => {
 
     expect(statsMock.getSummary).toHaveBeenCalled();
     expect(alertsMock.getAlerts).toHaveBeenCalled();
+    expect(predictions.getPredictions).toHaveBeenCalled();
     expect(fixture.componentInstance.alerts().length).toBe(1);
-    expect(fixture.componentInstance.error()).toBeNull();
+    expect(fixture.componentInstance.predictions().length).toBe(1);
+    expect(fixture.componentInstance.statsError()).toBeNull();
+    expect(fixture.componentInstance.alertsError()).toBeNull();
+    expect(fixture.componentInstance.predictionsError()).toBeNull();
   });
 
   it("signale l'indisponibilité puis repart au rafraîchissement suivant", () => {
@@ -61,6 +72,7 @@ describe('Dashboard', () => {
       providers: [
         { provide: StatsService, useValue: statsMock },
         { provide: AlertsService, useValue: alertsMock },
+        { provide: PredictionsService, useValue: predictionsMock() },
         provideRouter([]),
       ],
     });
@@ -70,13 +82,13 @@ describe('Dashboard', () => {
 
     vi.advanceTimersByTime(1);
     expect(statsMock.getSummary).toHaveBeenCalledTimes(1);
-    expect(fixture.componentInstance.error()).not.toBeNull();
+    expect(fixture.componentInstance.statsError()).not.toBeNull();
     expect(fixture.componentInstance.stats()).toBeNull();
 
     vi.advanceTimersByTime(10000);
     expect(statsMock.getSummary).toHaveBeenCalledTimes(2);
     expect(fixture.componentInstance.stats()).not.toBeNull();
-    expect(fixture.componentInstance.error()).toBeNull();
+    expect(fixture.componentInstance.statsError()).toBeNull();
   });
 
   it("n'interrompt pas la page quand le chargement des alertes échoue", () => {
@@ -88,6 +100,7 @@ describe('Dashboard', () => {
       providers: [
         { provide: StatsService, useValue: statsMock },
         { provide: AlertsService, useValue: alertsMock },
+        { provide: PredictionsService, useValue: predictionsMock() },
         provideRouter([]),
       ],
     });
@@ -96,6 +109,62 @@ describe('Dashboard', () => {
     fixture.detectChanges();
 
     expect(fixture.componentInstance.alerts().length).toBe(0);
+    expect(fixture.componentInstance.alertsError()).not.toBeNull();
+  });
+
+  it("n'interrompt pas la page quand le chargement des prévisions échoue", () => {
+    const statsMock = { getSummary: vi.fn().mockReturnValue(of({ total_sites: 7, sites: [] })) };
+    const alertsMock = { getAlerts: vi.fn().mockReturnValue(of([])) };
+    const predictions = {
+      getPredictions: vi.fn().mockReturnValue(throwError(() => new Error('nope'))),
+    };
+
+    TestBed.configureTestingModule({
+      imports: [Dashboard],
+      providers: [
+        { provide: StatsService, useValue: statsMock },
+        { provide: AlertsService, useValue: alertsMock },
+        { provide: PredictionsService, useValue: predictions },
+        provideRouter([]),
+      ],
+    });
+
+    const fixture = TestBed.createComponent(Dashboard);
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.predictions().length).toBe(0);
+    expect(fixture.componentInstance.predictionsError()).not.toBeNull();
+  });
+
+  it("un rafraîchissement de stats n'efface pas une erreur de prévisions en attente", () => {
+    vi.useFakeTimers();
+    const statsMock = { getSummary: vi.fn().mockReturnValue(of({ total_sites: 7, sites: [] })) };
+    const alertsMock = { getAlerts: vi.fn().mockReturnValue(of([])) };
+    const predictions = {
+      getPredictions: vi.fn().mockReturnValue(throwError(() => new Error('nope'))),
+    };
+
+    TestBed.configureTestingModule({
+      imports: [Dashboard],
+      providers: [
+        { provide: StatsService, useValue: statsMock },
+        { provide: AlertsService, useValue: alertsMock },
+        { provide: PredictionsService, useValue: predictions },
+        provideRouter([]),
+      ],
+    });
+
+    const fixture = TestBed.createComponent(Dashboard);
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.predictionsError()).not.toBeNull();
+
+    // Plusieurs cycles de `timer(0, 10_000)` (stats) plus tard, l'erreur des prévisions doit
+    // toujours être visible : rien ne vient la rafraîchir tant que la section n'est pas rechargée.
+    vi.advanceTimersByTime(30000);
+
+    expect(fixture.componentInstance.predictionsError()).not.toBeNull();
+    expect(fixture.componentInstance.statsError()).toBeNull();
   });
 
   it('appelle logout et redirige vers /login au clic sur le bouton de déconnexion', () => {
@@ -111,6 +180,7 @@ describe('Dashboard', () => {
     providers: [
       { provide: StatsService, useValue: statsMock },
       { provide: AlertsService, useValue: alertsMock },
+      { provide: PredictionsService, useValue: predictionsMock() },
       { provide: AuthService, useValue: authMock },
       provideRouter([]),
     ],
@@ -141,6 +211,7 @@ describe('Dashboard', () => {
     providers: [
       { provide: StatsService, useValue: statsMock },
       { provide: AlertsService, useValue: alertsMock },
+      { provide: PredictionsService, useValue: predictionsMock() },
       { provide: AuthService, useValue: authMock },
       provideRouter([]),
     ],
@@ -168,6 +239,7 @@ describe('Dashboard', () => {
       providers: [
         { provide: StatsService, useValue: statsMock },
         { provide: AlertsService, useValue: alertsMock },
+        { provide: PredictionsService, useValue: predictionsMock() },
         provideRouter([]),
       ],
     });
@@ -183,4 +255,26 @@ describe('Dashboard', () => {
       dashboard.badgeToneForSeverity('critical'),
     );
   });
+
+  it('distingue le ton des statuts de prévision', () => {
+    const statsMock = { getSummary: vi.fn().mockReturnValue(of({ total_sites: 7, sites: [] })) };
+    const alertsMock = { getAlerts: vi.fn().mockReturnValue(of([])) };
+
+    TestBed.configureTestingModule({
+      imports: [Dashboard],
+      providers: [
+        { provide: StatsService, useValue: statsMock },
+        { provide: AlertsService, useValue: alertsMock },
+        { provide: PredictionsService, useValue: predictionsMock() },
+        provideRouter([]),
+      ],
+    });
+
+    const fixture = TestBed.createComponent(Dashboard);
+    const dashboard = fixture.componentInstance;
+
+    expect(dashboard.badgeToneForPredictionStatus('available')).toBe('success');
+    expect(dashboard.badgeToneForPredictionStatus('insufficient_data')).toBe('warning');
+    expect(dashboard.badgeToneForPredictionStatus('error')).toBe('danger');
+  });
 });

apps/frontend/src/app/features/dashboard/dashboard.ts

@@ -1,15 +1,17 @@
-import { Component, OnInit, inject, signal, DestroyRef } from '@angular/core';
+import { Component, OnInit, inject, signal, DestroyRef, WritableSignal } from '@angular/core';
 import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
 import { timer, switchMap, catchError, EMPTY, Observable } from 'rxjs';
-import { DecimalPipe } from '@angular/common';
+import { DecimalPipe, DatePipe } from '@angular/common';
 import { Router, RouterLink } from '@angular/router';
 import { StatsService } from '../../core/services/stats.service';
 import { ConsumptionGauge } from '../../shared/components/consumption-gauge/consumption-gauge';
 import { SiteLoadChart } from '../../shared/components/site-load-chart/site-load-chart';
 import { AlertsService } from '../../core/services/alerts.service';
+import { PredictionsService } from '../../core/services/predictions.service';
 import { AuthService } from '../../core/services/auth.service';
 import { StatsSummary } from '../../shared/models/stats.model';
 import { Alert, AlertSeverity } from '../../shared/models/alert.model';
+import { PredictionStatus, SitePredictionSummary } from '../../shared/models/prediction.model';
 import { Card } from '../../shared/components/ui/card/card';
 import { Alert as EvAlert } from '../../shared/components/ui/alert/alert';
 import { Badge, BadgeTone } from '../../shared/components/ui/badge/badge';
@@ -27,11 +29,21 @@ const TON_PAR_SEVERITE: Record<AlertSeverity, BadgeTone> = {
   critical: 'critical',
 };
 
+// `error` n'a pas de précédent dans les fixtures ou l'API à ce jour, mais figure dans le
+// domaine du schéma backend (`ck_prediction_status`) : mieux vaut une couleur définie que
+// tomber sur `undefined` si ce statut apparaît un jour.
+const TON_PAR_STATUT_PREDICTION: Record<PredictionStatus, BadgeTone> = {
+  available: 'success',
+  insufficient_data: 'warning',
+  error: 'danger',
+};
+
 @Component({
   selector: 'app-dashboard',
   standalone: true,
   imports: [
     DecimalPipe,
+    DatePipe,
     RouterLink,
     ConsumptionGauge,
     SiteLoadChart,
@@ -48,30 +60,52 @@ export class Dashboard implements OnInit {
   private statsService = inject(StatsService);
   private alertsService = inject(AlertsService);
   public auth = inject(AuthService);
+  private predictionsService = inject(PredictionsService);
+  private auth = inject(AuthService);
   private router = inject(Router);
   private destroyRef = inject(DestroyRef);
 
   stats = signal<StatsSummary | null>(null);
   alerts = signal<Alert[]>([]);
-  error = signal<string | null>(null);
+  predictions = signal<SitePredictionSummary[]>([]);
+
+  // Un signal par flux, pas un seul `error` partagé : sinon le tick suivant de `timer` (stats)
+  // efface silencieusement un message d'échec des prévisions ou des alertes après 10s au plus,
+  // sans retry ni indication pour l'utilisateur que la section correspondante est restée vide.
+  statsError = signal<string | null>(null);
+  alertsError = signal<string | null>(null);
+  predictionsError = signal<string | null>(null);
 
   ngOnInit(): void {
     this.alertsService
       .getAlerts()
-      .pipe(catchError(() => this.reportUnavailable()))
-      .subscribe((alerts) => this.alerts.set(alerts));
+      .pipe(catchError(() => this.reportUnavailable(this.alertsError)))
+      .subscribe((alerts) => {
+        this.alertsError.set(null);
+        this.alerts.set(alerts);
+      });
+
+    // Les prévisions viennent d'un scoring hors ligne, pas d'un calcul à la demande : un seul
+    // chargement au démarrage suffit, pas besoin du rafraîchissement périodique de `stats`.
+    this.predictionsService
+      .getPredictions()
+      .pipe(catchError(() => this.reportUnavailable(this.predictionsError)))
+      .subscribe((summary) => {
+        this.predictionsError.set(null);
+        this.predictions.set(summary.sites);
+      });
 
     // Piège : le catchError porte sur l'observable interne. Sur le flux externe il
     // terminerait le timer, et le rafraîchissement ne repartirait jamais.
     timer(0, REFRESH_INTERVAL_MS)
       .pipe(
         switchMap(() =>
-          this.statsService.getSummary().pipe(catchError(() => this.reportUnavailable())),
+          this.statsService.getSummary().pipe(catchError(() => this.reportUnavailable(this.statsError))),
         ),
         takeUntilDestroyed(this.destroyRef),
       )
       .subscribe((stats) => {
-        this.error.set(null);
+        this.statsError.set(null);
         this.stats.set(stats);
       });
   }
@@ -80,6 +114,10 @@ export class Dashboard implements OnInit {
     return TON_PAR_SEVERITE[severity];
   }
 
+  badgeToneForPredictionStatus(status: PredictionStatus): BadgeTone {
+    return TON_PAR_STATUT_PREDICTION[status];
+  }
+
   onLogout(): void {
     this.auth.logout().subscribe({
       next: () => this.router.navigate(['/login']),
@@ -91,8 +129,8 @@ export class Dashboard implements OnInit {
     });
   }
 
-  private reportUnavailable(): Observable<never> {
-    this.error.set(UNAVAILABLE_MESSAGE);
+  private reportUnavailable(target: WritableSignal<string | null>): Observable<never> {
+    target.set(UNAVAILABLE_MESSAGE);
     return EMPTY;
   }
 }

apps/frontend/src/app/features/sites/site-detail-placeholder/site-detail-placeholder.html

@@ -1,19 +0,0 @@
-<div class="site-detail-placeholder">
-  <nav class="ev-breadcrumb">
-    <a routerLink="/dashboard">Tableau de bord</a>
-    <span>/</span>
-    <a routerLink="/sites">Sites</a>
-  </nav>
-
-  <header class="site-detail-placeholder__header">
-    <a routerLink="/dashboard" class="ev-brand-link">
-      <ev-brand class="site-detail-placeholder__logo" />
-    </a>
-    <h1>Site {{ siteId() }}</h1>
-  </header>
-
-  <ev-card>
-    <p>Le détail de ce site est à venir (voir issue #51).</p>
-    <a routerLink="/sites" class="ev-link">Retour aux sites</a>
-  </ev-card>
-</div>

apps/frontend/src/app/features/sites/site-detail-placeholder/site-detail-placeholder.scss

@@ -1,28 +0,0 @@
-:host {
-  display: block;
-  color: var(--color-text);
-  padding: 2.5rem 2rem;
-  max-width: 640px;
-  margin: 0 auto;
-}
-
-.site-detail-placeholder__header {
-  display: flex;
-  align-items: center;
-  gap: 0.85rem;
-  margin-bottom: 1.5rem;
-
-  h1 {
-    margin: 0;
-    font-size: 1.5rem;
-    font-weight: 700;
-  }
-}
-
-.site-detail-placeholder__logo {
-  font-size: 1.3rem;
-}
-
-ev-card p {
-  margin: 0 0 0.75rem;
-}

apps/frontend/src/app/features/sites/site-detail-placeholder/site-detail-placeholder.spec.ts

@@ -1,42 +0,0 @@
-import { TestBed } from '@angular/core/testing';
-import { ActivatedRoute, convertToParamMap, provideRouter } from '@angular/router';
-import { BehaviorSubject } from 'rxjs';
-import { SiteDetailPlaceholder } from './site-detail-placeholder';
-
-describe('SiteDetailPlaceholder', () => {
-  it("affiche l'identifiant du site depuis la route", () => {
-    const paramMap = new BehaviorSubject(convertToParamMap({ siteId: 'SITE001' }));
-    TestBed.configureTestingModule({
-      imports: [SiteDetailPlaceholder],
-      providers: [
-        provideRouter([]),
-        { provide: ActivatedRoute, useValue: { paramMap } },
-      ],
-    });
-
-    const fixture = TestBed.createComponent(SiteDetailPlaceholder);
-    fixture.detectChanges();
-
-    expect(fixture.nativeElement.textContent).toContain('SITE001');
-  });
-
-  it('met à jour l\'affichage quand le paramètre change sans recréer le composant', () => {
-    const paramMap = new BehaviorSubject(convertToParamMap({ siteId: 'SITE001' }));
-    TestBed.configureTestingModule({
-      imports: [SiteDetailPlaceholder],
-      providers: [
-        provideRouter([]),
-        { provide: ActivatedRoute, useValue: { paramMap } },
-      ],
-    });
-
-    const fixture = TestBed.createComponent(SiteDetailPlaceholder);
-    fixture.detectChanges();
-
-    paramMap.next(convertToParamMap({ siteId: 'SITE002' }));
-    fixture.detectChanges();
-
-    expect(fixture.nativeElement.textContent).toContain('SITE002');
-    expect(fixture.nativeElement.textContent).not.toContain('SITE001');
-  });
-});

apps/frontend/src/app/features/sites/site-detail-placeholder/site-detail-placeholder.ts

@@ -1,19 +0,0 @@
-import { Component, inject } from '@angular/core';
-import { toSignal } from '@angular/core/rxjs-interop';
-import { ActivatedRoute, RouterLink } from '@angular/router';
-import { map } from 'rxjs';
-import { Card } from '../../../shared/components/ui/card/card';
-import { Brand } from '../../../shared/components/ui/brand/brand';
-
-@Component({
-  selector: 'app-site-detail-placeholder',
-  standalone: true,
-  imports: [RouterLink, Card, Brand],
-  templateUrl: './site-detail-placeholder.html',
-  styleUrl: './site-detail-placeholder.scss',
-})
-export class SiteDetailPlaceholder {
-  private route = inject(ActivatedRoute);
-
-  siteId = toSignal(this.route.paramMap.pipe(map((params) => params.get('siteId'))));
-}

apps/frontend/src/app/features/sites/site-detail/site-detail.html

@@ -0,0 +1,85 @@
+<div class="site-detail">
+  <nav class="ev-breadcrumb">
+    <a routerLink="/dashboard">Tableau de bord</a>
+    <span>/</span>
+    <a routerLink="/sites">Sites</a>
+  </nav>
+
+  <header class="site-detail__header">
+    <a routerLink="/dashboard" class="ev-brand-link">
+      <ev-brand class="site-detail__logo" />
+    </a>
+    <div>
+      <h1>{{ site()?.site_name ?? siteId() }}</h1>
+      @if (site(); as s) {
+        <p class="site-detail__subtitle">
+          {{ s.site_type }} · {{ s.location || 'Localisation inconnue' }}
+        </p>
+      }
+    </div>
+    <div class="site-detail__badges">
+      @if (site(); as s) {
+        <ev-badge [tone]="badgeToneForStatus(s.status)">{{ s.status ?? '-' }}</ev-badge>
+      }
+      @if (hasMeasurement() && qualityLabel(); as label) {
+        <ev-badge [tone]="qualityTone()">{{ label }}</ev-badge>
+      }
+    </div>
+  </header>
+
+  @if (error(); as message) {
+    <ev-alert severity="danger" class="banner-error">{{ message }}</ev-alert>
+  }
+
+  @if (site(); as s) {
+    @if (hasMeasurement()) {
+      <section class="overview">
+        <ev-card class="card card--gauge">
+          <span class="card__label">Consommation vs capacité</span>
+          @let consumption = consumptionKw();
+          @if (consumption !== null) {
+            <app-consumption-gauge [consumption]="consumption" [capacity]="s.capacity_kw ?? 0" />
+            <span class="card__value">
+              {{ consumptionLabel() }} / {{ s.capacity_kw ?? '-' }} kW
+            </span>
+          } @else {
+            <p class="card__unavailable">
+              Consommation indisponible
+              <span class="metric__reason">({{ consumptionReason() }})</span>
+            </p>
+          }
+        </ev-card>
+
+        <ev-card class="metrics-card">
+          <span class="card__label">Mesure instantanée</span>
+          <dl class="metrics-grid">
+            @for (metric of metrics(); track metric.key) {
+              <div class="metric">
+                <dt>{{ metric.label }}</dt>
+                @if (metric.value !== null) {
+                  <dd>{{ metric.value }}</dd>
+                } @else {
+                  <dd class="metric__unavailable">
+                    Indisponible
+                    <span class="metric__reason">({{ metric.reason }})</span>
+                  </dd>
+                }
+              </div>
+            }
+          </dl>
+        </ev-card>
+      </section>
+
+      @if (history().length > 0) {
+        <section class="chart-section">
+          <h2>Historique de consommation</h2>
+          <app-reading-history-chart [readings]="history()" />
+        </section>
+      }
+    } @else {
+      <ev-alert severity="warning" class="banner-empty">{{ noMeasurementMessage }}</ev-alert>
+    }
+  }
+
+  <a routerLink="/sites" class="ev-link">Retour aux sites</a>
+</div>

apps/frontend/src/app/features/sites/site-detail/site-detail.scss

@@ -0,0 +1,119 @@
+:host {
+  display: block;
+  color: var(--color-text);
+  padding: 2.5rem 2rem;
+  max-width: 1100px;
+  margin: 0 auto;
+}
+
+.site-detail__header {
+  display: flex;
+  align-items: center;
+  gap: 0.85rem;
+  margin-bottom: 2rem;
+
+  h1 {
+    margin: 0;
+    font-size: 1.75rem;
+    font-weight: 700;
+  }
+}
+
+.site-detail__logo {
+  font-size: 1.3rem;
+}
+
+.site-detail__subtitle {
+  margin: 0.25rem 0 0;
+  color: var(--color-text-muted);
+}
+
+.site-detail__badges {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  margin-left: auto;
+}
+
+.banner-error {
+  display: block;
+  margin: 0 0 1.5rem;
+}
+
+.banner-empty {
+  display: block;
+  margin: 0 0 1.5rem;
+}
+
+.overview {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
+  gap: 1rem;
+  margin-bottom: 2.5rem;
+}
+
+.card {
+  padding: 1.25rem;
+  gap: 0.35rem;
+}
+
+.card--gauge {
+  align-items: center;
+  text-align: center;
+}
+
+.card__label {
+  font-size: 0.8rem;
+  color: var(--color-text-muted);
+  text-transform: uppercase;
+  letter-spacing: 0.02em;
+}
+
+.card__value {
+  font-size: 1.6rem;
+  font-weight: 700;
+}
+
+.card__unavailable {
+  color: var(--color-text-muted);
+  margin: 0;
+}
+
+.metrics-grid {
+  display: grid;
+  grid-template-columns: repeat(2, 1fr);
+  gap: 0.75rem 1.5rem;
+  margin: 0.5rem 0 0;
+}
+
+.metric {
+  dt {
+    font-size: 0.75rem;
+    color: var(--color-text-muted);
+  }
+
+  dd {
+    margin: 0;
+    font-size: 1.05rem;
+    font-weight: 600;
+  }
+}
+
+.metric__unavailable {
+  color: var(--color-text-muted);
+  font-weight: 400;
+}
+
+.metric__reason {
+  font-size: 0.8rem;
+}
+
+h2 {
+  font-size: 1.1rem;
+  font-weight: 600;
+  margin: 0 0 1rem;
+}
+
+.chart-section {
+  margin-bottom: 2rem;
+}

apps/frontend/src/app/features/sites/site-detail/site-detail.spec.ts

@@ -0,0 +1,281 @@
+import { TestBed } from '@angular/core/testing';
+import { ActivatedRoute, convertToParamMap, provideRouter } from '@angular/router';
+import { vi } from 'vitest';
+import { BehaviorSubject, of, throwError } from 'rxjs';
+import { SiteDetail } from './site-detail';
+import { SitesService } from '../../../core/services/sites.service';
+import { ReadingsService } from '../../../core/services/readings.service';
+
+const SITE = {
+  site_id: 'SITE001',
+  site_name: 'Site 1',
+  site_type: 'industriel',
+  location: 'Nantes',
+  capacity_kw: 500,
+  status: 'actif',
+};
+
+const CURRENT_COMPLET = {
+  timestamp: '2026-09-17T10:00:00Z',
+  site_id: 'SITE001',
+  site_type: 'industriel',
+  consumption_kw: 120,
+  consumption_kwh: null,
+  voltage_v: 230,
+  current_a: 12,
+  power_factor: 0.95,
+  temperature_celsius: 22,
+  humidity_percent: 55,
+  null_reasons: [] as string[],
+  data_quality: 'good' as const,
+};
+
+const SANS_MESURE = {
+  ...CURRENT_COMPLET,
+  timestamp: null,
+  consumption_kw: null,
+  voltage_v: null,
+  current_a: null,
+  power_factor: null,
+  temperature_celsius: null,
+  humidity_percent: null,
+  data_quality: 'critical' as const,
+};
+
+const LECTURE = {
+  reading_id: 1,
+  site_id: 'SITE001',
+  timestamp: '2026-09-17T09:00:00Z',
+  source: 'api_history' as const,
+  consumption_kw: 118,
+  consumption_kwh: null,
+  consumption_euros: null,
+  voltage_v: 230,
+  current_a: 12,
+  power_factor: 0.95,
+  temperature_celsius: 22,
+  humidity_percent: 55,
+  solar_irradiance_wm2: null,
+  is_working_hours: true,
+  data_quality: 'good' as const,
+  null_reasons: null,
+  imputed_values: null,
+  imputation_method: null,
+};
+
+function setup(
+  siteId: string,
+  sitesMock: Partial<SitesService>,
+  readingsMock: Partial<ReadingsService>,
+) {
+  const paramMap = new BehaviorSubject(convertToParamMap({ siteId }));
+  TestBed.configureTestingModule({
+    imports: [SiteDetail],
+    providers: [
+      provideRouter([]),
+      { provide: ActivatedRoute, useValue: { paramMap } },
+      { provide: SitesService, useValue: sitesMock },
+      { provide: ReadingsService, useValue: readingsMock },
+    ],
+  });
+  return { fixture: TestBed.createComponent(SiteDetail), paramMap };
+}
+
+describe('SiteDetail', () => {
+  it('charge le site, la mesure courante et son historique au démarrage', () => {
+    const { fixture } = setup(
+      'SITE001',
+      {
+        getSite: vi.fn().mockReturnValue(of(SITE)),
+        getCurrent: vi.fn().mockReturnValue(of(CURRENT_COMPLET)),
+      },
+      { getHistory: vi.fn().mockReturnValue(of([LECTURE])) },
+    );
+
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.site()?.site_id).toBe('SITE001');
+    expect(fixture.componentInstance.current()?.consumption_kw).toBe(120);
+    expect(fixture.componentInstance.history().length).toBe(1);
+    expect(fixture.componentInstance.error()).toBeNull();
+  });
+
+  it("signale l'indisponibilité quand un des appels échoue", () => {
+    const { fixture } = setup(
+      'SITE001',
+      {
+        getSite: vi.fn().mockReturnValue(throwError(() => new Error('nope'))),
+        getCurrent: vi.fn().mockReturnValue(of(CURRENT_COMPLET)),
+      },
+      { getHistory: vi.fn().mockReturnValue(of([])) },
+    );
+
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.error()).not.toBeNull();
+    expect(fixture.componentInstance.site()).toBeNull();
+  });
+
+  it('efface les données du site précédent quand le chargement du suivant échoue', () => {
+    const getSite = vi
+      .fn()
+      .mockReturnValueOnce(of(SITE))
+      .mockReturnValueOnce(throwError(() => new Error('404')));
+    const { fixture, paramMap } = setup(
+      'SITE001',
+      { getSite, getCurrent: vi.fn().mockReturnValue(of(CURRENT_COMPLET)) },
+      { getHistory: vi.fn().mockReturnValue(of([LECTURE])) },
+    );
+
+    fixture.detectChanges();
+    expect(fixture.componentInstance.site()?.site_id).toBe('SITE001');
+
+    paramMap.next(convertToParamMap({ siteId: 'SITE002' }));
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.error()).not.toBeNull();
+    expect(fixture.componentInstance.site()).toBeNull();
+    expect(fixture.componentInstance.current()).toBeNull();
+    expect(fixture.componentInstance.history()).toEqual([]);
+    expect(fixture.nativeElement.textContent).not.toContain('Site 1');
+  });
+
+  it('interroge le site et sa mesure courante en parallèle', () => {
+    const getSite = vi.fn().mockReturnValue(of(SITE));
+    const getCurrent = vi.fn().mockReturnValue(of(CURRENT_COMPLET));
+    const { fixture } = setup(
+      'SITE001',
+      { getSite, getCurrent },
+      { getHistory: vi.fn().mockReturnValue(of([])) },
+    );
+
+    fixture.detectChanges();
+
+    expect(getSite).toHaveBeenCalledWith('SITE001');
+    expect(getCurrent).toHaveBeenCalledWith('SITE001');
+  });
+
+  it('signale la panne du capteur de consommation au lieu de tracer une jauge à zéro', () => {
+    const sansConsommation = {
+      ...CURRENT_COMPLET,
+      consumption_kw: null,
+      null_reasons: ['consumption_sensor_failure'],
+      data_quality: 'partial' as const,
+    };
+    const { fixture } = setup(
+      'SITE001',
+      {
+        getSite: vi.fn().mockReturnValue(of(SITE)),
+        getCurrent: vi.fn().mockReturnValue(of(sansConsommation)),
+      },
+      { getHistory: vi.fn().mockReturnValue(of([LECTURE])) },
+    );
+
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.consumptionKw()).toBeNull();
+    expect(fixture.componentInstance.consumptionReason()).toBe('capteur de consommation en panne');
+    expect(fixture.nativeElement.querySelector('app-consumption-gauge')).toBeNull();
+    expect(fixture.nativeElement.textContent).toContain('Consommation indisponible');
+  });
+
+  it('trace la jauge pour une consommation nulle réellement mesurée', () => {
+    const { fixture } = setup(
+      'SITE001',
+      {
+        getSite: vi.fn().mockReturnValue(of(SITE)),
+        getCurrent: vi.fn().mockReturnValue(of({ ...CURRENT_COMPLET, consumption_kw: 0 })),
+      },
+      { getHistory: vi.fn().mockReturnValue(of([LECTURE])) },
+    );
+
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.consumptionLabel()).toBe('0.0 kW');
+    expect(fixture.nativeElement.querySelector('app-consumption-gauge')).not.toBeNull();
+    expect(fixture.nativeElement.textContent).not.toContain('Consommation indisponible');
+  });
+
+  it('affiche explicitement les champs null avec leur raison plutôt que de les masquer', () => {
+    const partielle = {
+      ...CURRENT_COMPLET,
+      voltage_v: null,
+      current_a: null,
+      power_factor: null,
+      null_reasons: ['electrical_sensor_failure'],
+      data_quality: 'partial' as const,
+    };
+    const { fixture } = setup(
+      'SITE001',
+      {
+        getSite: vi.fn().mockReturnValue(of(SITE)),
+        getCurrent: vi.fn().mockReturnValue(of(partielle)),
+      },
+      { getHistory: vi.fn().mockReturnValue(of([LECTURE])) },
+    );
+
+    fixture.detectChanges();
+
+    const tension = fixture.componentInstance.metrics().find((m) => m.key === 'voltage_v');
+    expect(tension?.value).toBeNull();
+    expect(tension?.reason).toBe('capteur électrique en panne');
+
+    const texte = fixture.nativeElement.textContent;
+    expect(texte).toContain('Indisponible');
+    expect(texte).toContain('capteur électrique en panne');
+    expect(texte).toContain('Données partielles');
+  });
+
+  it('recharge les données quand le paramètre de route siteId change', () => {
+    const getSite = vi.fn().mockReturnValue(of(SITE));
+    const { fixture, paramMap } = setup(
+      'SITE001',
+      { getSite, getCurrent: vi.fn().mockReturnValue(of(CURRENT_COMPLET)) },
+      { getHistory: vi.fn().mockReturnValue(of([])) },
+    );
+
+    fixture.detectChanges();
+    paramMap.next(convertToParamMap({ siteId: 'SITE002' }));
+    fixture.detectChanges();
+
+    expect(getSite).toHaveBeenCalledWith('SITE002');
+  });
+
+  it("ancre la fenêtre d'historique sur la dernière mesure connue plutôt que sur l'horloge", () => {
+    const getHistory = vi.fn().mockReturnValue(of([]));
+    const { fixture } = setup(
+      'SITE001',
+      {
+        getSite: vi.fn().mockReturnValue(of(SITE)),
+        getCurrent: vi.fn().mockReturnValue(of(CURRENT_COMPLET)),
+      },
+      { getHistory },
+    );
+
+    fixture.detectChanges();
+
+    expect(getHistory).toHaveBeenCalledWith(
+      'SITE001',
+      '2026-09-16T10:00:00.000Z',
+      '2026-09-17T10:00:00Z',
+    );
+  });
+
+  it("annonce l'absence de mesure sans interroger l'historique quand timestamp est null", () => {
+    const getHistory = vi.fn().mockReturnValue(of([]));
+    const { fixture } = setup(
+      'SITE001',
+      {
+        getSite: vi.fn().mockReturnValue(of(SITE)),
+        getCurrent: vi.fn().mockReturnValue(of(SANS_MESURE)),
+      },
+      { getHistory },
+    );
+
+    fixture.detectChanges();
+
+    expect(getHistory).not.toHaveBeenCalled();
+    expect(fixture.componentInstance.hasMeasurement()).toBe(false);
+    expect(fixture.nativeElement.textContent).toContain('Aucune mesure remontée pour ce site.');
+  });
+});

apps/frontend/src/app/features/sites/site-detail/site-detail.ts

@@ -0,0 +1,213 @@
+import { Component, DestroyRef, computed, inject, signal } from '@angular/core';
+import { takeUntilDestroyed, toObservable, toSignal } from '@angular/core/rxjs-interop';
+import { ActivatedRoute, RouterLink } from '@angular/router';
+import { catchError, EMPTY, filter, forkJoin, map, Observable, of, switchMap } from 'rxjs';
+import { SitesService } from '../../../core/services/sites.service';
+import { ReadingsService } from '../../../core/services/readings.service';
+import { Site } from '../../../shared/models/site.model';
+import { Reading, ReadingDataQuality } from '../../../shared/models/reading.model';
+import { SiteCurrent } from '../../../shared/models/site-current.model';
+import { Card } from '../../../shared/components/ui/card/card';
+import { Alert } from '../../../shared/components/ui/alert/alert';
+import { Badge, BadgeTone } from '../../../shared/components/ui/badge/badge';
+import { Brand } from '../../../shared/components/ui/brand/brand';
+import { ConsumptionGauge } from '../../../shared/components/consumption-gauge/consumption-gauge';
+import { ReadingHistoryChart } from '../../../shared/components/reading-history-chart/reading-history-chart';
+
+const UNAVAILABLE_MESSAGE = 'Détail du site indisponible, réessayez plus tard.';
+const NO_MEASUREMENT_MESSAGE = 'Aucune mesure remontée pour ce site.';
+const HISTORY_WINDOW_MS = 24 * 60 * 60 * 1000;
+
+const TON_PAR_STATUT: Record<string, BadgeTone> = {
+  actif: 'success',
+  maintenance: 'warning',
+  hors_service: 'danger',
+};
+
+const TON_PAR_QUALITE: Record<ReadingDataQuality, BadgeTone> = {
+  good: 'success',
+  partial: 'warning',
+  degraded: 'danger',
+  critical: 'critical',
+};
+
+const LIBELLE_PAR_QUALITE: Record<ReadingDataQuality, string> = {
+  good: 'Données complètes',
+  partial: 'Données partielles',
+  degraded: 'Données dégradées',
+  critical: 'Données critiques',
+};
+
+type MetricKey =
+  | 'consumption_kw'
+  | 'voltage_v'
+  | 'current_a'
+  | 'power_factor'
+  | 'temperature_celsius'
+  | 'humidity_percent';
+
+interface MetricDef {
+  key: MetricKey;
+  label: string;
+  format: (value: number) => string;
+}
+
+const CONSUMPTION_DEF: MetricDef = {
+  key: 'consumption_kw',
+  label: 'Consommation',
+  format: (v) => `${v.toFixed(1)} kW`,
+};
+
+const METRIC_DEFS: MetricDef[] = [
+  CONSUMPTION_DEF,
+  { key: 'voltage_v', label: 'Tension', format: (v) => `${v.toFixed(1)} V` },
+  { key: 'current_a', label: 'Courant', format: (v) => `${v.toFixed(1)} A` },
+  { key: 'power_factor', label: 'Cos φ', format: (v) => v.toFixed(2) },
+  { key: 'temperature_celsius', label: 'Température', format: (v) => `${v.toFixed(1)} °C` },
+  { key: 'humidity_percent', label: 'Humidité', format: (v) => `${v.toFixed(0)} %` },
+];
+
+// Contrainte : miroir de RAISON_VERS_CAPTEUR et CHAMPS_PAR_CAPTEUR (backend, services/sensor.py) ;
+// `null_reasons` porte le code de panne du capteur, jamais le nom du champ resté vide.
+const RAISONS_PAR_CHAMP: Record<MetricKey, string[]> = {
+  consumption_kw: ['consumption_sensor_failure', 'network_loss'],
+  voltage_v: ['electrical_sensor_failure', 'network_loss'],
+  current_a: ['electrical_sensor_failure', 'network_loss'],
+  power_factor: ['electrical_sensor_failure', 'network_loss'],
+  temperature_celsius: ['temperature_sensor_failure', 'network_loss'],
+  humidity_percent: ['humidity_sensor_failure', 'network_loss'],
+};
+
+const LIBELLE_PAR_RAISON: Record<string, string> = {
+  consumption_sensor_failure: 'capteur de consommation en panne',
+  electrical_sensor_failure: 'capteur électrique en panne',
+  temperature_sensor_failure: 'capteur de température en panne',
+  humidity_sensor_failure: "capteur d'humidité en panne",
+  network_loss: 'perte réseau',
+};
+
+export interface MetricView {
+  key: MetricKey;
+  label: string;
+  value: string | null;
+  reason: string;
+}
+
+@Component({
+  selector: 'app-site-detail',
+  standalone: true,
+  imports: [RouterLink, Card, Alert, Badge, Brand, ConsumptionGauge, ReadingHistoryChart],
+  templateUrl: './site-detail.html',
+  styleUrl: './site-detail.scss',
+})
+export class SiteDetail {
+  private route = inject(ActivatedRoute);
+  private sitesService = inject(SitesService);
+  private readingsService = inject(ReadingsService);
+  private destroyRef = inject(DestroyRef);
+
+  readonly noMeasurementMessage = NO_MEASUREMENT_MESSAGE;
+
+  siteId = toSignal(this.route.paramMap.pipe(map((params) => params.get('siteId') ?? '')));
+
+  site = signal<Site | null>(null);
+  current = signal<SiteCurrent | null>(null);
+  history = signal<Reading[]>([]);
+  error = signal<string | null>(null);
+
+  hasMeasurement = computed(() => this.current()?.timestamp != null);
+
+  consumptionKw = computed(() => this.current()?.consumption_kw ?? null);
+
+  consumptionLabel = computed(() => {
+    const kw = this.consumptionKw();
+    return kw != null ? CONSUMPTION_DEF.format(kw) : null;
+  });
+
+  consumptionReason = computed(() => this.reasonFor('consumption_kw', this.current()));
+
+  qualityLabel = computed(() => {
+    const quality = this.current()?.data_quality;
+    return quality ? LIBELLE_PAR_QUALITE[quality] : null;
+  });
+
+  qualityTone = computed<BadgeTone>(() => {
+    const quality = this.current()?.data_quality;
+    return quality ? TON_PAR_QUALITE[quality] : 'neutral';
+  });
+
+  metrics = computed<MetricView[]>(() => {
+    const current = this.current();
+    return METRIC_DEFS.map((def) => {
+      const valeur = current ? current[def.key] : null;
+      return {
+        key: def.key,
+        label: def.label,
+        value: valeur != null ? def.format(valeur) : null,
+        reason: valeur == null ? this.reasonFor(def.key, current) : '',
+      };
+    });
+  });
+
+  constructor() {
+    toObservable(this.siteId)
+      .pipe(
+        filter((siteId): siteId is string => !!siteId),
+        // Piège : switchMap sur le flux externe annule le chargement en cours dès qu'un
+        // nouveau siteId arrive, sinon une réponse en retard peut écraser le site affiché.
+        switchMap((siteId) => this.load(siteId)),
+        takeUntilDestroyed(this.destroyRef),
+      )
+      .subscribe((result) => {
+        this.error.set(null);
+        this.site.set(result.site);
+        this.current.set(result.current);
+        this.history.set(result.history);
+      });
+  }
+
+  badgeToneForStatus(status: string | null): BadgeTone {
+    return status ? (TON_PAR_STATUT[status] ?? 'neutral') : 'neutral';
+  }
+
+  private load(siteId: string) {
+    return forkJoin({
+      site: this.sitesService.getSite(siteId),
+      current: this.sitesService.getCurrent(siteId),
+    }).pipe(
+      switchMap(({ site, current }) =>
+        this.loadHistory(siteId, current).pipe(map((history) => ({ site, current, history }))),
+      ),
+      catchError(() => this.reportUnavailable()),
+    );
+  }
+
+  private loadHistory(siteId: string, current: SiteCurrent): Observable<Reading[]> {
+    // Piège : le jeu de données s'arrête bien avant « maintenant » ; ancrer la fenêtre sur la
+    // dernière mesure connue plutôt que sur l'horloge évite un historique systématiquement vide.
+    const end = current.timestamp;
+    if (end === null) {
+      return of([]);
+    }
+    const start = new Date(new Date(end).getTime() - HISTORY_WINDOW_MS).toISOString();
+    return this.readingsService.getHistory(siteId, start, end);
+  }
+
+  private reasonFor(field: MetricKey, current: SiteCurrent | null): string {
+    const raisons = RAISONS_PAR_CHAMP[field];
+    const trouvees = (current?.null_reasons ?? [])
+      .filter((raison) => raisons.includes(raison))
+      .map((raison) => LIBELLE_PAR_RAISON[raison] ?? raison);
+    return trouvees.length > 0 ? trouvees.join(', ') : 'cause inconnue';
+  }
+
+  // Piège : vider les signaux avec l'erreur, sinon la page garde le site précédemment chargé
+  // sous le bandeau et laisse lire les chiffres de A en croyant regarder B.
+  private reportUnavailable(): Observable<never> {
+    this.error.set(UNAVAILABLE_MESSAGE);
+    this.site.set(null);
+    this.current.set(null);
+    this.history.set([]);
+    return EMPTY;
+  }
+}

apps/frontend/src/app/shared/components/reading-history-chart/reading-history-chart.html

@@ -0,0 +1 @@
+<canvas #canvas></canvas>

apps/frontend/src/app/shared/components/reading-history-chart/reading-history-chart.scss

@@ -0,0 +1,4 @@
+:host {
+  display: block;
+  height: 260px;
+}

apps/frontend/src/app/shared/components/reading-history-chart/reading-history-chart.spec.ts

@@ -0,0 +1,101 @@
+import { TestBed } from '@angular/core/testing';
+import { vi } from 'vitest';
+import { Chart } from 'chart.js';
+import { ReadingHistoryChart } from './reading-history-chart';
+
+vi.mock('chart.js', () => {
+  class ChartMock {
+    static instances: ChartMock[] = [];
+    static register = vi.fn();
+    update = vi.fn();
+    destroy = vi.fn();
+    data: { labels?: unknown[]; datasets: Record<string, unknown>[] } = { datasets: [{}] };
+    constructor(_canvas: unknown, config?: { data?: ChartMock['data'] }) {
+      if (config?.data) {
+        this.data = config.data;
+      }
+      ChartMock.instances.push(this);
+    }
+  }
+  return { Chart: ChartMock, registerables: [] };
+});
+
+type ChartDouble = {
+  destroy: ReturnType<typeof vi.fn>;
+  data: { labels?: unknown[]; datasets: Record<string, unknown>[] };
+};
+
+function lastChart(): ChartDouble | undefined {
+  return (Chart as unknown as { instances: ChartDouble[] }).instances.at(-1);
+}
+
+const READING = {
+  reading_id: 1,
+  site_id: 'S1',
+  timestamp: '2026-09-17T10:00:00Z',
+  source: 'api_history' as const,
+  consumption_kw: 42,
+  consumption_kwh: null,
+  consumption_euros: null,
+  voltage_v: null,
+  current_a: null,
+  power_factor: null,
+  temperature_celsius: null,
+  humidity_percent: null,
+  solar_irradiance_wm2: null,
+  is_working_hours: null,
+  data_quality: 'good' as const,
+  null_reasons: null,
+  imputed_values: null,
+  imputation_method: null,
+};
+
+describe('ReadingHistoryChart', () => {
+  it('se crée sans erreur avec une liste de lectures valide', () => {
+    TestBed.configureTestingModule({ imports: [ReadingHistoryChart] });
+    const fixture = TestBed.createComponent(ReadingHistoryChart);
+    fixture.componentRef.setInput('readings', [READING]);
+    expect(() => fixture.detectChanges()).not.toThrow();
+  });
+
+  it('met à jour le graphique quand les lectures changent après initialisation', () => {
+    TestBed.configureTestingModule({ imports: [ReadingHistoryChart] });
+    const fixture = TestBed.createComponent(ReadingHistoryChart);
+    fixture.componentRef.setInput('readings', [READING]);
+    fixture.detectChanges();
+
+    fixture.componentRef.setInput('readings', [
+      { ...READING, reading_id: 2, consumption_kw: 60, data_quality: 'critical' as const },
+    ]);
+    fixture.detectChanges();
+
+    expect(() => fixture.detectChanges()).not.toThrow();
+  });
+
+  it("trace du plus ancien au plus récent, quel que soit l'ordre reçu de l'API", () => {
+    TestBed.configureTestingModule({ imports: [ReadingHistoryChart] });
+    const fixture = TestBed.createComponent(ReadingHistoryChart);
+    // L'API trie en timestamp décroissant : le composant doit rétablir la chronologie.
+    fixture.componentRef.setInput('readings', [
+      { ...READING, reading_id: 2, timestamp: '2026-09-17T11:00:00Z', consumption_kw: 60 },
+      { ...READING, reading_id: 1, timestamp: '2026-09-17T10:00:00Z', consumption_kw: 42 },
+    ]);
+    fixture.detectChanges();
+
+    const chart = lastChart();
+    expect(chart?.data.labels).toEqual(['2026-09-17T10:00:00Z', '2026-09-17T11:00:00Z']);
+    expect(chart?.data.datasets[0]['data']).toEqual([42, 60]);
+  });
+
+  it('détruit le graphique quand le composant est détruit', () => {
+    TestBed.configureTestingModule({ imports: [ReadingHistoryChart] });
+    const fixture = TestBed.createComponent(ReadingHistoryChart);
+    fixture.componentRef.setInput('readings', [READING]);
+    fixture.detectChanges();
+
+    const chart = lastChart();
+    fixture.destroy();
+
+    expect(chart?.destroy).toHaveBeenCalledTimes(1);
+  });
+});

apps/frontend/src/app/shared/components/reading-history-chart/reading-history-chart.ts

@@ -0,0 +1,95 @@
+import {
+  Component,
+  ElementRef,
+  ViewChild,
+  input,
+  effect,
+  AfterViewInit,
+  OnDestroy,
+} from '@angular/core';
+import { Chart, registerables } from 'chart.js';
+import { Reading, ReadingDataQuality } from '../../models/reading.model';
+
+Chart.register(...registerables);
+
+const QUALITY_COLORS: Record<ReadingDataQuality, string> = {
+  good: '#3b82f6',
+  partial: '#f9a825',
+  degraded: '#ef6c00',
+  critical: '#c62828',
+};
+const UNKNOWN_QUALITY_COLOR = '#9ca3af';
+
+interface ChartSeries {
+  labels: string[];
+  values: number[];
+  colors: string[];
+}
+
+// Piège : l'API renvoie les lectures du plus récent au plus ancien (ReadingRepository.list_history
+// trie en timestamp desc) ; sans ce tri l'axe des abscisses se lirait à rebours.
+function toSeries(readings: Reading[]): ChartSeries {
+  const ordered = [...readings].sort((a, b) => Date.parse(a.timestamp) - Date.parse(b.timestamp));
+  return {
+    labels: ordered.map((r) => r.timestamp),
+    values: ordered.map((r) => r.consumption_kw ?? 0),
+    colors: ordered.map((r) =>
+      r.data_quality ? QUALITY_COLORS[r.data_quality] : UNKNOWN_QUALITY_COLOR,
+    ),
+  };
+}
+
+@Component({
+  selector: 'app-reading-history-chart',
+  standalone: true,
+  templateUrl: './reading-history-chart.html',
+  styleUrl: './reading-history-chart.scss',
+})
+export class ReadingHistoryChart implements AfterViewInit, OnDestroy {
+  readings = input.required<Reading[]>();
+
+  @ViewChild('canvas') private canvasRef!: ElementRef<HTMLCanvasElement>;
+  private chart?: Chart<'line'>;
+
+  constructor() {
+    effect(() => {
+      const series = toSeries(this.readings());
+      if (this.chart) {
+        this.chart.data.labels = series.labels;
+        this.chart.data.datasets[0].data = series.values;
+        this.chart.data.datasets[0].pointBackgroundColor = series.colors;
+        this.chart.update('none');
+      }
+    });
+  }
+
+  ngAfterViewInit(): void {
+    const series = toSeries(this.readings());
+    this.chart = new Chart(this.canvasRef.nativeElement, {
+      type: 'line',
+      data: {
+        labels: series.labels,
+        datasets: [
+          {
+            data: series.values,
+            borderColor: '#3b82f6',
+            pointBackgroundColor: series.colors,
+            tension: 0.25,
+          },
+        ],
+      },
+      options: {
+        responsive: true,
+        maintainAspectRatio: false,
+        plugins: { legend: { display: false } },
+        scales: {
+          y: { beginAtZero: true, title: { display: true, text: 'Consommation (kW)' } },
+        },
+      },
+    });
+  }
+
+  ngOnDestroy(): void {
+    this.chart?.destroy();
+  }
+}

apps/frontend/src/app/shared/models/prediction.model.ts

@@ -0,0 +1,24 @@
+export type PredictionStatus = 'available' | 'insufficient_data' | 'error';
+export type PredictionTargetMetric = 'consumption_kwh' | 'consumption_kw';
+
+export interface SitePrediction {
+  target_at: string;
+  target_metric: PredictionTargetMetric;
+  period_minutes: number | null;
+  predicted_value: number | null;
+  status: PredictionStatus;
+  failure_reason: string | null;
+  model_reference: string;
+  created_at: string;
+}
+
+export interface SitePredictionSummary {
+  site_id: string;
+  site_name: string;
+  prediction: SitePrediction | null;
+}
+
+export interface PredictionSummary {
+  timestamp: string;
+  sites: SitePredictionSummary[];
+}

apps/frontend/src/app/shared/models/reading.model.ts

@@ -0,0 +1,23 @@
+export type ReadingSource = 'csv' | 'api_current' | 'api_history';
+export type ReadingDataQuality = 'good' | 'partial' | 'degraded' | 'critical';
+
+export interface Reading {
+  reading_id: number;
+  site_id: string;
+  timestamp: string;
+  source: ReadingSource;
+  consumption_kw: number | null;
+  consumption_kwh: number | null;
+  consumption_euros: string | null;
+  voltage_v: number | null;
+  current_a: number | null;
+  power_factor: number | null;
+  temperature_celsius: number | null;
+  humidity_percent: number | null;
+  solar_irradiance_wm2: number | null;
+  is_working_hours: boolean | null;
+  data_quality: ReadingDataQuality | null;
+  null_reasons: string[] | null;
+  imputed_values: Record<string, unknown> | null;
+  imputation_method: string | null;
+}

apps/frontend/src/app/shared/models/site-current.model.ts

@@ -0,0 +1,16 @@
+import { ReadingDataQuality } from './reading.model';
+
+export interface SiteCurrent {
+  timestamp: string | null;
+  site_id: string;
+  site_type: string;
+  consumption_kw: number | null;
+  consumption_kwh: number | null;
+  voltage_v: number | null;
+  current_a: number | null;
+  power_factor: number | null;
+  temperature_celsius: number | null;
+  humidity_percent: number | null;
+  null_reasons: string[];
+  data_quality: ReadingDataQuality;
+}

apps/frontend/src/environments/environment.development.ts

@@ -1,5 +1,5 @@
 export const environment = {
   production: false,
   apiUrl: '/api/v1',
-  useMockFixtures: true, // a passer a false une fois le backend prêt
+  useMockFixtures: false,
 };