diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 3687c7d..c4a4ead 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -4,11 +4,11 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="7c107abe-5995-4428-8429-b146aaca8386" name="Changes" comment="feat : système de blocage utilisateur">
-      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/config/reference.php" beforeDir="false" afterPath="$PROJECT_DIR$/config/reference.php" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/frontend/i18n/locales/fr.json" beforeDir="false" afterPath="$PROJECT_DIR$/frontend/i18n/locales/fr.json" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/frontend/layouts/default.vue" beforeDir="false" afterPath="$PROJECT_DIR$/frontend/layouts/default.vue" afterDir="false" />
+    <list default="true" id="7c107abe-5995-4428-8429-b146aaca8386" name="Changes" comment="feat : ajout d'un système de scanner bovin">
+      <change beforePath="$PROJECT_DIR$/CLAUDE.md" beforeDir="false" afterPath="$PROJECT_DIR$/CLAUDE.md" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/frontend/services/dto/building-data.ts" beforeDir="false" afterPath="$PROJECT_DIR$/frontend/services/dto/building-data.ts" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/Entity/Building.php" beforeDir="false" afterPath="$PROJECT_DIR$/src/Entity/Building.php" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/Entity/BuildingCase.php" beforeDir="false" afterPath="$PROJECT_DIR$/src/Entity/BuildingCase.php" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -325,15 +325,7 @@
       <workItem from="1773766075191" duration="6202000" />
       <workItem from="1773824491213" duration="24805000" />
       <workItem from="1774275549972" duration="51000" />
-      <workItem from="1774276665015" duration="27805000" />
-    </task>
-    <task id="LOCAL-00033" summary="feat : ajout de la debug bar en mod dev">
-      <option name="closed" value="true" />
-      <created>1769177611987</created>
-      <option name="number" value="00033" />
-      <option name="presentableId" value="LOCAL-00033" />
-      <option name="project" value="LOCAL" />
-      <updated>1769177611987</updated>
+      <workItem from="1774276665015" duration="28168000" />
     </task>
     <task id="LOCAL-00034" summary="feat : ajout du bundle Malio ednotif pour l'utilisation des WS">
       <option name="closed" value="true" />
@@ -719,7 +711,15 @@
       <option name="project" value="LOCAL" />
       <updated>1774450388149</updated>
     </task>
-    <option name="localTasksCounter" value="82" />
+    <task id="LOCAL-00082" summary="feat : ajout d'un système de scanner bovin">
+      <option name="closed" value="true" />
+      <created>1774543296474</created>
+      <option name="number" value="00082" />
+      <option name="presentableId" value="LOCAL-00082" />
+      <option name="project" value="LOCAL" />
+      <updated>1774543296474</updated>
+    </task>
+    <option name="localTasksCounter" value="83" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -769,7 +769,6 @@
     </option>
   </component>
   <component name="VcsManagerConfiguration">
-    <MESSAGE value="fix: corrections diverses" />
     <MESSAGE value="fix : corrections diverses" />
     <MESSAGE value="fix : corrections frontend" />
     <MESSAGE value="feat : affichage et modification expédition et modification bouton valider" />
@@ -794,7 +793,8 @@
     <MESSAGE value="fix : bouton de mise en attente" />
     <MESSAGE value="fix : problème de bearer token" />
     <MESSAGE value="feat : système de blocage utilisateur" />
-    <option name="LAST_COMMIT_MESSAGE" value="feat : système de blocage utilisateur" />
+    <MESSAGE value="feat : ajout d'un système de scanner bovin" />
+    <option name="LAST_COMMIT_MESSAGE" value="feat : ajout d'un système de scanner bovin" />
   </component>
   <component name="XDebuggerManager">
     <breakpoint-manager>
diff --git a/CLAUDE.md b/CLAUDE.md
index f1b2667..902346a 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -142,6 +142,15 @@ frontend/
 - `BuildingCase` a `bovines` (OneToMany).
 - Rapport PDF cases : `GET /building_cases/{id}/weights-report` → template Twig, projection depuis `arrivalDate`, gain journalier fixe `1.3 kg/jour`.
 
+### Scanner boucles auriculaires
+- Page dédiée `/scan` : scan de codes-barres Code 39/128 (boucles auriculaires bovines) depuis un téléphone Android via Chrome.
+- Utilise l'API native `BarcodeDetector` (Shape Detection API, Chrome Android 83+) — pas de lib JS, décodage hardware quasi-instantané.
+- **Non supporté sur iOS** (tous les navigateurs iOS utilisent WebKit, qui n'implémente pas `BarcodeDetector`).
+- Les 4 premiers caractères du code-barres sont retirés avant enregistrement (`rawValue.slice(4)`).
+- Composable `useBarcodeScanner` : caméra arrière, anti-doublon 2s, vibration au scan.
+- Le bovin est créé via `POST /bovines` avec `Content-Type: application/ld+json` (nécessaire pour la résolution d'IRI de `buildingCase`).
+- Sélection bâtiment → case (filtrées dynamiquement) avant de scanner.
+
 ### Données de référence
 - `ReceptionType`, `MerchandiseType`, `PelletType`, `Building`, `Supplier` (avec `Address` via join table, `createdBy` → User), `Customer` (avec `Address` via join table, `createdBy` → User), `Truck`, `Carrier`, `Driver`, `Vehicle`.
 - `Address` : champ `label` nullable (déprécié, retiré du front et du `address:write`), expose `fullAddress` via getter. `countryCode` par défaut `FR` côté front.
diff --git a/frontend/services/dto/building-data.ts b/frontend/services/dto/building-data.ts
index 60729d4..3f5a9d4 100644
--- a/frontend/services/dto/building-data.ts
+++ b/frontend/services/dto/building-data.ts
@@ -1,8 +1,10 @@
 import type { BuildingLayoutData } from '~/services/dto/building-layout-data'
+import type { BuildingCaseData } from '~/services/dto/building-case-data'
 
 export interface BuildingData {
     id: number
     label: string
     code: string
     layouts?: BuildingLayoutData[] | null
+    buildingCases?: BuildingCaseData[] | null
 }
diff --git a/src/Entity/Building.php b/src/Entity/Building.php
index af68257..d1d37eb 100644
--- a/src/Entity/Building.php
+++ b/src/Entity/Building.php
@@ -53,6 +53,8 @@ class Building
      * @var Collection<int, BuildingCase>
      */
     #[ORM\OneToMany(targetEntity: BuildingCase::class, mappedBy: 'id_building')]
+    #[Groups(['building:read'])]
+    #[SerializedName('buildingCases')]
     private Collection $buildingCases;
 
     /**
diff --git a/src/Entity/BuildingCase.php b/src/Entity/BuildingCase.php
index a3f2dd8..0dd4f85 100644
--- a/src/Entity/BuildingCase.php
+++ b/src/Entity/BuildingCase.php
@@ -17,6 +17,10 @@ use Symfony\Component\Serializer\Attribute\SerializedName;
 #[ORM\Entity]
 #[ApiResource(
     operations: [
+        new Get(
+            requirements: ['id' => '\d+'],
+            normalizationContext: ['groups' => ['building:read']],
+        ),
         new Get(
             uriTemplate: '/building_cases/{id}/weights-report',
             requirements: ['id' => '\d+'],