Passage v0.16.0

.github/workflows/desktop-release.yml

@@ -22,6 +22,14 @@ name: Desktop installers
 on:
   push:
     tags: ['v*']
+  # Declenchement MANUEL depuis l'onglet Actions ("Run workflow"). Utile quand un
+  # tag a ete pousse AVANT que le workflow existe sur GitHub (ne se redeclenche
+  # pas tout seul), ou pour rejouer un build. Saisir la version SANS le "v".
+  workflow_dispatch:
+    inputs:
+      version:
+        description: "Version a builder (doit correspondre a un tag existant, ex: 0.15.0 ou 0.15.0-beta)"
+        required: true
 
 permissions:
   contents: write   # requis pour creer la Release et y attacher le .msi
@@ -30,7 +38,12 @@ jobs:
   windows:
     runs-on: windows-latest
     steps:
+      # En declenchement manuel, on checkout le TAG correspondant a la version
+      # saisie (sinon checkout prendrait la branche par defaut). En push de tag,
+      # on prend la ref poussee.
       - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event_name == 'workflow_dispatch' && format('v{0}', inputs.version) || github.ref }}
 
       # Apporte jpackage (lanceur d'empaquetage natif) dans le PATH.
       - name: Set up JDK 21
@@ -57,24 +70,37 @@ jobs:
         shell: pwsh
         run: choco install wixtoolset -y --no-progress
 
-      # Version de l'installeur = version du tag (numerique, sans suffixe -beta).
+      # Version de l'installeur = version du tag (push) OU de l'input (manuel).
-      - name: Derive version from tag
+      # Sorties : version (numerique X.Y.Z pour le MSI), tag (vX.Y.Z[-beta]),
+      # isbeta (true/false) — independant du nom de ref (qui est une branche en manuel).
+      - name: Derive version
         id: ver
         shell: pwsh
         run: |
-          $full = "${{ github.ref_name }}" -replace '^v',''   # ex: 0.15.0-beta.1
+          if ('${{ github.event_name }}' -eq 'workflow_dispatch') {
-          $num  = ($full -split '-')[0]                        # ex: 0.15.0
+            $raw = '${{ inputs.version }}'
-          "version=$num" >> $env:GITHUB_OUTPUT
+          } else {
+            $raw = '${{ github.ref_name }}'
+          }
+          $raw = $raw -replace '^v',''            # 0.15.0  ou  0.15.0-beta
+          $num = ($raw -split '-')[0]             # 0.15.0
+          $isbeta = if ($raw -like '*-beta*') { 'true' } else { 'false' }
+          "version=$num"   >> $env:GITHUB_OUTPUT
+          "tag=v$raw"      >> $env:GITHUB_OUTPUT
+          "isbeta=$isbeta" >> $env:GITHUB_OUTPUT
 
       - name: Build Windows installer
         shell: pwsh
         run: .\installers\desktop\build-windows.ps1 -Version ${{ steps.ver.outputs.version }}
 
       # STABLE uniquement : Release GitHub publique avec le .msi.
+      # tag_name explicite : en declenchement manuel, github.ref est une branche,
+      # donc on cible le tag derive (la release est attachee au bon tag).
       - name: Publish installer to GitHub Release (stable)
-        if: ${{ !contains(github.ref_name, '-beta') }}
+        if: ${{ steps.ver.outputs.isbeta == 'false' }}
         uses: softprops/action-gh-release@v2
         with:
+          tag_name: ${{ steps.ver.outputs.tag }}
           files: core/target/dist-out/*.msi
           fail_on_unmatched_files: true
           generate_release_notes: true
@@ -82,7 +108,7 @@ jobs:
       # BETA uniquement : artefact PRIVE (pas de release publique). A recuperer
       # via l'onglet Actions puis a joindre a un post Patreon gate par palier.
       - name: Upload installer as private artifact (beta)
-        if: ${{ contains(github.ref_name, '-beta') }}
+        if: ${{ steps.ver.outputs.isbeta == 'true' }}
         uses: actions/upload-artifact@v4
         with:
           name: loremind-beta-${{ steps.ver.outputs.version }}-msi

brain/app/main.py

@@ -26,7 +26,7 @@ from app.infrastructure.ollama_model_installer import ensure_ollama_embedding_mo
 app = FastAPI(
     title="LoreMind Brain",
     description="Backend IA pour la génération de contenu narratif.",
-    version="0.15.0",
+    version="0.16.0",
 )
 
 logger = logging.getLogger(__name__)

core/pom.xml

@@ -14,7 +14,7 @@
 
     <groupId>com.loremind</groupId>
     <artifactId>loremind-core</artifactId>
-    <version>0.15.0</version>
+    <version>0.16.0</version>
     <name>LoreMind Core</name>
     <description>Backend Core - Architecture Hexagonale</description>
 

core/src/main/java/com/loremind/LoreMindApplication.java

@@ -1,6 +1,7 @@
 package com.loremind;
 
 import com.loremind.infrastructure.desktop.DesktopSingleInstance;
+import com.loremind.infrastructure.desktop.DesktopUserConfig;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.scheduling.annotation.EnableScheduling;
@@ -30,6 +31,12 @@ public class LoreMindApplication {
             // ce qui leverait HeadlessException — on le desactive ici. En mode
             // serveur/Docker, on reste en headless (defaut), aucun impact.
             app.setHeadless(false);
+            // Config utilisateur editable (~/.loremind/loremind.properties) : creee
+            // au 1er lancement (port + identifiants admin). Puis resolution du port :
+            // celui configure s'il est libre, sinon un port libre (evite l'echec de
+            // demarrage si 8080 est deja pris). Publie server.port + ~/.loremind/.port.
+            DesktopUserConfig.ensureExists();
+            DesktopUserConfig.resolveAndPublishPort();
         }
         app.run(args);
     }

core/src/main/java/com/loremind/domain/images/ports/ImageStorage.java

@@ -26,6 +26,21 @@ public interface ImageStorage {
      */
     String upload(String filename, String contentType, InputStream data, long sizeBytes);
 
+    /**
+     * Stocke un flux binaire SOUS UNE CLE IMPOSEE (pas de generation).
+     * <p>
+     * Utilise par l'import de contenu pour reinjecter une image sous sa cle
+     * d'origine, garantissant que les references {@code storageKey} portees par
+     * les entites restent valides apres un transfert inter-instance.
+     * Ecrase si la cle existe deja.
+     *
+     * @param storageKey  cle opaque exacte sous laquelle stocker (ex: images/UUID.ext)
+     * @param contentType MIME type
+     * @param data        flux binaire a stocker
+     * @param sizeBytes   taille en octets (requis par certains backends comme S3)
+     */
+    void store(String storageKey, String contentType, InputStream data, long sizeBytes);
+
     /** Recupere le flux binaire associe a une cle, ou null si inexistante. */
     InputStream download(String storageKey);
 

core/src/main/java/com/loremind/infrastructure/desktop/DesktopSingleInstance.java

@@ -80,9 +80,9 @@ public final class DesktopSingleInstance {
         }
     }
 
-    /** Ouvre le navigateur par defaut sur l'URL de l'application locale. */
+    /** Ouvre le navigateur par defaut sur l'URL de l'application locale (port reel). */
     public static void openAppInBrowser() {
-        openUrl("http://localhost:" + System.getProperty("server.port", "8080") + "/");
+        openUrl("http://localhost:" + DesktopUserConfig.runningPort() + "/");
     }
 
     /** Ouvre le navigateur par defaut sur une URL quelconque (sans dependance AWT). */
@@ -105,6 +105,45 @@ public final class DesktopSingleInstance {
         }
     }
 
+    /** Ouvre un dossier dans le gestionnaire de fichiers du systeme. */
+    public static void openFolder(Path dir) {
+        try {
+            Files.createDirectories(dir);
+            String os = System.getProperty("os.name", "").toLowerCase();
+            ProcessBuilder pb;
+            if (os.contains("win")) {
+                pb = new ProcessBuilder("explorer.exe", dir.toString());
+            } else if (os.contains("mac")) {
+                pb = new ProcessBuilder("open", dir.toString());
+            } else {
+                pb = new ProcessBuilder("xdg-open", dir.toString());
+            }
+            pb.start();
+        } catch (IOException e) {
+            System.err.println("[Desktop] Ouverture du dossier impossible : " + e.getMessage());
+        }
+    }
+
+    /** Ouvre un fichier texte dans l'editeur par defaut (Bloc-notes sous Windows). */
+    public static void openInEditor(Path file) {
+        try {
+            String os = System.getProperty("os.name", "").toLowerCase();
+            ProcessBuilder pb;
+            if (os.contains("win")) {
+                // notepad : toujours present, ouvre proprement un .properties
+                // (dont l'association par defaut n'est pas garantie).
+                pb = new ProcessBuilder("notepad.exe", file.toString());
+            } else if (os.contains("mac")) {
+                pb = new ProcessBuilder("open", "-t", file.toString());
+            } else {
+                pb = new ProcessBuilder("xdg-open", file.toString());
+            }
+            pb.start();
+        } catch (IOException e) {
+            System.err.println("[Desktop] Ouverture du fichier impossible : " + e.getMessage());
+        }
+    }
+
     private static Path loremindHome() {
         String home = System.getProperty("loremind.home");
         if (home != null && !home.isBlank()) return Path.of(home);

core/src/main/java/com/loremind/infrastructure/desktop/DesktopUserConfig.java

@@ -0,0 +1,166 @@
+package com.loremind.infrastructure.desktop;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.InetAddress;
+import java.net.ServerSocket;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Properties;
+
+/**
+ * Configuration UTILISATEUR du mode bureau, dans un fichier éditable
+ * {@code ~/.loremind/loremind.properties} (port HTTP, identifiants admin).
+ * <p>
+ * Pourquoi un fichier et pas l'UI : le port et le mot de passe admin sont requis
+ * AVANT que le serveur (et donc l'UI web) ne démarre — impossible de les régler
+ * depuis l'app elle-même. Un fichier texte simple, lu au démarrage, est le
+ * pattern standard d'une app de bureau. Les modifs prennent effet au prochain
+ * lancement.
+ * <p>
+ * - {@code server.port} : lu ici (résolution du port) ET par Spring.
+ * - {@code admin.username} / {@code admin.password} : chargés par Spring via
+ *   {@code spring.config.import} (cf. application-local.properties) — ils
+ *   surchargent les défauts du profil local.
+ * <p>
+ * Repli de port : si le port configuré est occupé, on en choisit un libre
+ * automatiquement (évite un échec de démarrage cryptique sur conflit de port)
+ * et on écrit le port réellement utilisé dans {@code ~/.loremind/.port} pour que
+ * l'ouverture du navigateur (instance gagnante OU 2e double-clic) cible la bonne URL.
+ */
+public final class DesktopUserConfig {
+
+    private DesktopUserConfig() {}
+
+    private static final String DEFAULT_TEMPLATE = """
+            # ============================================================
+            #  Configuration locale de LoreMind (mode bureau)
+            # ------------------------------------------------------------
+            #  Modifiez ces valeurs puis RELANCEZ LoreMind pour appliquer.
+            # ============================================================
+
+            # Port HTTP local de l'application (http://localhost:<port>).
+            # Si ce port est deja occupe par une autre application, LoreMind
+            # choisira automatiquement un autre port libre au demarrage.
+            server.port=8080
+
+            # Identifiants de la page Parametres (acces admin).
+            # Accessible uniquement en local sur cette machine.
+            admin.username=admin
+            admin.password=admin
+            """;
+
+    /** Chemin du fichier de config utilisateur (pour l'ouvrir depuis le menu systray). */
+    public static Path getConfigFile() {
+        return configFile();
+    }
+
+    /** Dossier de données/config de l'instance ({@code ~/.loremind}). */
+    public static Path getHomeDir() {
+        return loremindHome();
+    }
+
+    /** Crée le fichier de config avec des valeurs par défaut commentées s'il n'existe pas. */
+    public static void ensureExists() {
+        Path file = configFile();
+        if (Files.exists(file)) {
+            return;
+        }
+        try {
+            Files.createDirectories(file.getParent());
+            Files.writeString(file, DEFAULT_TEMPLATE);
+            System.out.println("[Desktop] Config utilisateur creee : " + file);
+        } catch (IOException e) {
+            System.err.println("[Desktop] Impossible de creer " + file + " : " + e.getMessage()
+                    + " — defauts utilises (port 8080, admin/admin).");
+        }
+    }
+
+    /**
+     * Résout le port à utiliser : le port configuré s'il est libre, sinon un port
+     * libre choisi automatiquement. Publie le résultat dans la propriété système
+     * {@code server.port} (que Spring lira en priorité) et dans {@code ~/.loremind/.port}.
+     *
+     * @return le port effectivement retenu.
+     */
+    public static int resolveAndPublishPort() {
+        int wanted = configuredPort();
+        int chosen = isPortFree(wanted) ? wanted : findFreePort(wanted);
+        if (chosen != wanted) {
+            System.out.println("[Desktop] Port " + wanted + " occupe — repli sur le port libre " + chosen + ".");
+        }
+        System.setProperty("server.port", String.valueOf(chosen));
+        try {
+            Files.writeString(portFile(), String.valueOf(chosen));
+        } catch (IOException e) {
+            System.err.println("[Desktop] Ecriture du port impossible (" + e.getMessage() + ").");
+        }
+        return chosen;
+    }
+
+    /**
+     * Port sur lequel l'application répond réellement (pour ouvrir le navigateur).
+     * Ordre : propriété système (instance gagnante) → fichier .port (2e double-clic)
+     * → port configuré → 8080.
+     */
+    public static int runningPort() {
+        String sys = System.getProperty("server.port");
+        if (sys != null && !sys.isBlank()) {
+            try { return Integer.parseInt(sys.trim()); } catch (NumberFormatException ignored) { /* fallthrough */ }
+        }
+        try {
+            Path p = portFile();
+            if (Files.exists(p)) {
+                return Integer.parseInt(Files.readString(p).trim());
+            }
+        } catch (IOException | NumberFormatException ignored) { /* fallthrough */ }
+        return configuredPort();
+    }
+
+    /** Port lu dans le fichier de config utilisateur (défaut 8080). */
+    private static int configuredPort() {
+        Path file = configFile();
+        if (Files.exists(file)) {
+            Properties props = new Properties();
+            try (InputStream in = Files.newInputStream(file)) {
+                props.load(in);
+                String v = props.getProperty("server.port");
+                if (v != null && !v.isBlank()) {
+                    return Integer.parseInt(v.trim());
+                }
+            } catch (IOException | NumberFormatException ignored) { /* défaut */ }
+        }
+        return 8080;
+    }
+
+    private static boolean isPortFree(int port) {
+        try (ServerSocket s = new ServerSocket(port, 1, InetAddress.getByName("127.0.0.1"))) {
+            s.setReuseAddress(true);
+            return true;
+        } catch (IOException e) {
+            return false;
+        }
+    }
+
+    private static int findFreePort(int fallbackIfNone) {
+        try (ServerSocket s = new ServerSocket(0, 1, InetAddress.getByName("127.0.0.1"))) {
+            return s.getLocalPort();
+        } catch (IOException e) {
+            return fallbackIfNone; // tres improbable ; on retente le port voulu
+        }
+    }
+
+    private static Path configFile() {
+        return loremindHome().resolve("loremind.properties");
+    }
+
+    private static Path portFile() {
+        return loremindHome().resolve(".port");
+    }
+
+    private static Path loremindHome() {
+        String home = System.getProperty("loremind.home");
+        if (home != null && !home.isBlank()) return Path.of(home);
+        return Path.of(System.getProperty("user.home"), ".loremind");
+    }
+}

core/src/main/java/com/loremind/infrastructure/desktop/SystemTrayManager.java

@@ -69,6 +69,22 @@ public class SystemTrayManager {
 
             popup.addSeparator();
 
+            // Reglages : ouvre loremind.properties (port, identifiants admin) dans
+            // l'editeur. Les changements prennent effet au prochain demarrage.
+            MenuItem editConfig = new MenuItem("Modifier la configuration (port, identifiants…)");
+            editConfig.addActionListener(e -> {
+                DesktopUserConfig.ensureExists();
+                DesktopSingleInstance.openInEditor(DesktopUserConfig.getConfigFile());
+            });
+            popup.add(editConfig);
+
+            // Acces au dossier de donnees (~/.loremind : base, images, config…).
+            MenuItem openFolder = new MenuItem("Ouvrir le dossier LoreMind");
+            openFolder.addActionListener(e -> DesktopSingleInstance.openFolder(DesktopUserConfig.getHomeDir()));
+            popup.add(openFolder);
+
+            popup.addSeparator();
+
             MenuItem quit = new MenuItem("Quitter LoreMind");
             quit.addActionListener(e -> quit());
             popup.add(quit);

core/src/main/java/com/loremind/infrastructure/persistence/jpa/ImageJpaRepository.java

@@ -4,10 +4,14 @@ import com.loremind.infrastructure.persistence.entity.ImageJpaEntity;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
+import java.util.Optional;
+
 /**
  * Repository Spring Data JPA pour ImageJpaEntity.
- * Ne contient aucune requete custom pour l'instant : CRUD standard suffit.
  */
 @Repository
 public interface ImageJpaRepository extends JpaRepository<ImageJpaEntity, Long> {
+
+    /** Recherche par cle de stockage (unique). Utilise par l'import de contenu. */
+    Optional<ImageJpaEntity> findByStorageKey(String storageKey);
 }

core/src/main/java/com/loremind/infrastructure/storage/FilesystemImageStorageAdapter.java

@@ -11,6 +11,7 @@ import java.io.InputStream;
 import java.io.UncheckedIOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
 import java.util.UUID;
 
 /**
@@ -59,6 +60,18 @@ public class FilesystemImageStorageAdapter implements ImageStorage {
         }
     }
 
+    @Override
+    public void store(String storageKey, String contentType, InputStream data, long sizeBytes) {
+        Path target = resolveKey(storageKey);
+        try {
+            Files.createDirectories(target.getParent());
+            // Ecrase si la cle existe deja (contrat de store-avec-cle).
+            Files.copy(data, target, StandardCopyOption.REPLACE_EXISTING);
+        } catch (IOException e) {
+            throw new UncheckedIOException("Echec de l'ecriture de l'image sur disque (cle imposee) : " + target, e);
+        }
+    }
+
     @Override
     public InputStream download(String storageKey) {
         Path source = resolveKey(storageKey);

core/src/main/java/com/loremind/infrastructure/storage/MinioImageStorageAdapter.java

@@ -54,6 +54,22 @@ public class MinioImageStorageAdapter implements ImageStorage {
         }
     }
 
+    @Override
+    public void store(String storageKey, String contentType, InputStream data, long sizeBytes) {
+        try {
+            minioClient.putObject(
+                    PutObjectArgs.builder()
+                            .bucket(bucket)
+                            .object(storageKey)
+                            .stream(data, sizeBytes, -1)
+                            .contentType(contentType)
+                            .build()
+            );
+        } catch (Exception e) {
+            throw new RuntimeException("Echec du store MinIO (cle imposee) : " + e.getMessage(), e);
+        }
+    }
+
     @Override
     public InputStream download(String storageKey) {
         try {

core/src/main/java/com/loremind/infrastructure/transfer/ExportService.java

@@ -0,0 +1,350 @@
+package com.loremind.infrastructure.transfer;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import com.loremind.domain.images.ports.ImageStorage;
+import com.loremind.infrastructure.persistence.converter.PrerequisiteListJsonConverter;
+import com.loremind.infrastructure.persistence.entity.*;
+import com.loremind.infrastructure.persistence.jpa.*;
+import com.loremind.infrastructure.transfer.dto.ContentExport;
+import org.springframework.boot.info.BuildProperties;
+import org.springframework.lang.Nullable;
+import org.springframework.stereotype.Service;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.UncheckedIOException;
+import java.util.ArrayList;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipOutputStream;
+
+/**
+ * Service d'EXPORT du "contenu" en format logique (JSON) portable.
+ * <p>
+ * Construit un {@link ContentExport} a partir des entites JPA puis le serialise
+ * dans un .zip contenant :
+ * <ul>
+ *   <li>{@code manifest.json} — metadonnees (version de format, version app, date)</li>
+ *   <li>{@code data.json}     — tout le contenu (pretty-printed)</li>
+ *   <li>{@code images/<storageKey>} — un binaire par image referencee</li>
+ * </ul>
+ * Volontairement DECOUPLE de la base : c'est un export logique, pas un dump,
+ * pour fonctionner entre Postgres (Docker) et H2 (local).
+ */
+@Service
+public class ExportService {
+
+    private static final int FORMAT_VERSION = 1;
+
+    // Réutilise le converter JPA pour (dé)sérialiser les prérequis dans le MÊME
+    // format que la base (discriminant "kind"), au lieu de Jackson polymorphe.
+    private static final PrerequisiteListJsonConverter PREREQ_CONVERTER = new PrerequisiteListJsonConverter();
+
+    private final GameSystemJpaRepository gameSystemRepo;
+    private final LoreJpaRepository loreRepo;
+    private final LoreNodeJpaRepository loreNodeRepo;
+    private final TemplateJpaRepository templateRepo;
+    private final PageJpaRepository pageRepo;
+    private final CampaignJpaRepository campaignRepo;
+    private final ArcJpaRepository arcRepo;
+    private final ChapterJpaRepository chapterRepo;
+    private final SceneJpaRepository sceneRepo;
+    private final CharacterJpaRepository characterRepo;
+    private final NpcJpaRepository npcRepo;
+    private final EnemyJpaRepository enemyRepo;
+    private final ItemCatalogJpaRepository itemCatalogRepo;
+    private final RandomTableJpaRepository randomTableRepo;
+    private final ImageJpaRepository imageRepo;
+    private final ImageStorage imageStorage;
+    private final ObjectMapper objectMapper;
+    private final String appVersion;
+
+    public ExportService(GameSystemJpaRepository gameSystemRepo,
+                         LoreJpaRepository loreRepo,
+                         LoreNodeJpaRepository loreNodeRepo,
+                         TemplateJpaRepository templateRepo,
+                         PageJpaRepository pageRepo,
+                         CampaignJpaRepository campaignRepo,
+                         ArcJpaRepository arcRepo,
+                         ChapterJpaRepository chapterRepo,
+                         SceneJpaRepository sceneRepo,
+                         CharacterJpaRepository characterRepo,
+                         NpcJpaRepository npcRepo,
+                         EnemyJpaRepository enemyRepo,
+                         ItemCatalogJpaRepository itemCatalogRepo,
+                         RandomTableJpaRepository randomTableRepo,
+                         ImageJpaRepository imageRepo,
+                         ImageStorage imageStorage,
+                         ObjectMapper objectMapper,
+                         @Nullable BuildProperties buildProperties) {
+        this.gameSystemRepo = gameSystemRepo;
+        this.loreRepo = loreRepo;
+        this.loreNodeRepo = loreNodeRepo;
+        this.templateRepo = templateRepo;
+        this.pageRepo = pageRepo;
+        this.campaignRepo = campaignRepo;
+        this.arcRepo = arcRepo;
+        this.chapterRepo = chapterRepo;
+        this.sceneRepo = sceneRepo;
+        this.characterRepo = characterRepo;
+        this.npcRepo = npcRepo;
+        this.enemyRepo = enemyRepo;
+        this.itemCatalogRepo = itemCatalogRepo;
+        this.randomTableRepo = randomTableRepo;
+        this.imageRepo = imageRepo;
+        this.imageStorage = imageStorage;
+        this.objectMapper = objectMapper;
+        this.appVersion = buildProperties != null ? buildProperties.getVersion() : "dev";
+    }
+
+    /**
+     * Charge toutes les entites du perimetre et les mappe vers les DTO plats.
+     *
+     * @param exportedAt horodatage ISO stampe par la couche appelante (controller)
+     */
+    public ContentExport buildExport(String exportedAt) {
+        ContentExport.Manifest manifest =
+                new ContentExport.Manifest(FORMAT_VERSION, appVersion, exportedAt);
+
+        List<ContentExport.GameSystemDto> gameSystems = gameSystemRepo.findAll().stream()
+                .map(this::toGameSystemDto).toList();
+        List<ContentExport.LoreDto> lores = loreRepo.findAll().stream()
+                .map(this::toLoreDto).toList();
+        List<ContentExport.LoreNodeDto> loreNodes = loreNodeRepo.findAll().stream()
+                .map(this::toLoreNodeDto).toList();
+        List<ContentExport.TemplateDto> templates = templateRepo.findAll().stream()
+                .map(this::toTemplateDto).toList();
+        List<ContentExport.PageDto> pages = pageRepo.findAll().stream()
+                .map(this::toPageDto).toList();
+        List<ContentExport.CampaignDto> campaigns = campaignRepo.findAll().stream()
+                .map(this::toCampaignDto).toList();
+        List<ContentExport.ArcDto> arcs = arcRepo.findAll().stream()
+                .map(this::toArcDto).toList();
+        List<ContentExport.ChapterDto> chapters = chapterRepo.findAll().stream()
+                .map(this::toChapterDto).toList();
+        List<ContentExport.SceneDto> scenes = sceneRepo.findAll().stream()
+                .map(this::toSceneDto).toList();
+        List<ContentExport.CharacterDto> characters = characterRepo.findAll().stream()
+                .map(this::toCharacterDto).toList();
+        List<ContentExport.NpcDto> npcs = npcRepo.findAll().stream()
+                .map(this::toNpcDto).toList();
+        List<ContentExport.EnemyDto> enemies = enemyRepo.findAll().stream()
+                .map(this::toEnemyDto).toList();
+        List<ContentExport.ItemCatalogDto> itemCatalogs = itemCatalogRepo.findAll().stream()
+                .map(this::toItemCatalogDto).toList();
+        List<ContentExport.RandomTableDto> randomTables = randomTableRepo.findAll().stream()
+                .map(this::toRandomTableDto).toList();
+        List<ContentExport.ImageDto> images = imageRepo.findAll().stream()
+                .map(this::toImageDto).toList();
+
+        return new ContentExport(manifest, gameSystems, lores, loreNodes, templates,
+                pages, campaigns, arcs, chapters, scenes, characters, npcs, enemies,
+                itemCatalogs, randomTables, images);
+    }
+
+    /**
+     * Serialise un export dans le flux fourni au format .zip.
+     * <p>
+     * Les binaires d'images ne sont ecrits que pour les storageKeys REFERENCES
+     * par les entites exportees (illustration/map/portrait/header/imageValues),
+     * pas pour toute la table images — on evite de trimballer des orphelins.
+     */
+    public void writeZip(ContentExport export, OutputStream out) {
+        try (ZipOutputStream zip = new ZipOutputStream(out)) {
+            // manifest.json
+            zip.putNextEntry(new ZipEntry("manifest.json"));
+            zip.write(objectMapper.writerWithDefaultPrettyPrinter()
+                    .writeValueAsBytes(export.manifest()));
+            zip.closeEntry();
+
+            // data.json
+            zip.putNextEntry(new ZipEntry("data.json"));
+            zip.write(objectMapper.copy()
+                    .enable(SerializationFeature.INDENT_OUTPUT)
+                    .writeValueAsBytes(export));
+            zip.closeEntry();
+
+            // Binaires images : uniquement ceux reellement references.
+            Set<String> referenced = collectReferencedStorageKeys(export);
+            Set<String> written = new LinkedHashSet<>();
+            for (String key : referenced) {
+                if (key == null || key.isBlank() || !written.add(key)) {
+                    continue;
+                }
+                try (InputStream data = imageStorage.download(key)) {
+                    if (data == null) {
+                        continue; // cle orpheline : on ignore silencieusement
+                    }
+                    zip.putNextEntry(new ZipEntry("images/" + key));
+                    data.transferTo(zip);
+                    zip.closeEntry();
+                }
+            }
+        } catch (IOException e) {
+            throw new UncheckedIOException("Echec de la generation du zip d'export", e);
+        }
+    }
+
+    /**
+     * Collecte tous les storageKeys references par le contenu exporte :
+     * Arc/Chapter/Scene (illustration + map), Character/Npc/Enemy
+     * (portrait + header + imageValues), Page (imageValues).
+     */
+    private Set<String> collectReferencedStorageKeys(ContentExport export) {
+        Set<String> keys = new LinkedHashSet<>();
+        for (ContentExport.ArcDto a : export.arcs()) {
+            addAll(keys, a.illustrationImageIds());
+            addAll(keys, a.mapImageIds());
+        }
+        for (ContentExport.ChapterDto c : export.chapters()) {
+            addAll(keys, c.illustrationImageIds());
+            addAll(keys, c.mapImageIds());
+        }
+        for (ContentExport.SceneDto s : export.scenes()) {
+            addAll(keys, s.illustrationImageIds());
+            addAll(keys, s.mapImageIds());
+        }
+        for (ContentExport.CharacterDto c : export.characters()) {
+            add(keys, c.portraitImageId());
+            add(keys, c.headerImageId());
+            addImageValues(keys, c.imageValues());
+        }
+        for (ContentExport.NpcDto n : export.npcs()) {
+            add(keys, n.portraitImageId());
+            add(keys, n.headerImageId());
+            addImageValues(keys, n.imageValues());
+        }
+        for (ContentExport.EnemyDto e : export.enemies()) {
+            add(keys, e.portraitImageId());
+            add(keys, e.headerImageId());
+            addImageValues(keys, e.imageValues());
+        }
+        for (ContentExport.PageDto p : export.pages()) {
+            addImageValues(keys, p.imageValues());
+        }
+        return keys;
+    }
+
+    private void add(Set<String> keys, String key) {
+        if (key != null && !key.isBlank()) keys.add(key);
+    }
+
+    private void addAll(Set<String> keys, List<String> list) {
+        if (list != null) list.forEach(k -> add(keys, k));
+    }
+
+    private void addImageValues(Set<String> keys, java.util.Map<String, List<String>> imageValues) {
+        if (imageValues != null) imageValues.values().forEach(l -> addAll(keys, l));
+    }
+
+    // ----- Mappers entite -> DTO -----
+
+    private ContentExport.GameSystemDto toGameSystemDto(GameSystemJpaEntity e) {
+        return new ContentExport.GameSystemDto(e.getId(), e.getName(), e.getDescription(),
+                e.getRulesMarkdown(), e.getCharacterTemplate(), e.getNpcTemplate(),
+                e.getEnemyTemplate(), e.getAuthor(), e.isPublic());
+    }
+
+    private ContentExport.LoreDto toLoreDto(LoreJpaEntity e) {
+        return new ContentExport.LoreDto(e.getId(), e.getName(), e.getDescription(),
+                e.getNodeCount(), e.getPageCount());
+    }
+
+    private ContentExport.LoreNodeDto toLoreNodeDto(LoreNodeJpaEntity e) {
+        return new ContentExport.LoreNodeDto(e.getId(), e.getName(), e.getIcon(),
+                e.getParentId(), e.getLoreId());
+    }
+
+    private ContentExport.TemplateDto toTemplateDto(TemplateJpaEntity e) {
+        return new ContentExport.TemplateDto(e.getId(), e.getLoreId(), e.getName(),
+                e.getDescription(), e.getDefaultNodeId(), e.getFields());
+    }
+
+    private ContentExport.PageDto toPageDto(PageJpaEntity e) {
+        return new ContentExport.PageDto(e.getId(), e.getLoreId(), e.getNodeId(),
+                e.getTemplateId(), e.getTitle(), e.getValues(), e.getImageValues(),
+                e.getKeyValueValues(), e.getTableValues(), e.getNotes(), e.getTags(),
+                e.getRelatedPageIds());
+    }
+
+    private ContentExport.CampaignDto toCampaignDto(CampaignJpaEntity e) {
+        return new ContentExport.CampaignDto(e.getId(), e.getName(), e.getDescription(),
+                e.getArcsCount(), e.getLoreId(), e.getGameSystemId());
+    }
+
+    private ContentExport.ArcDto toArcDto(ArcJpaEntity e) {
+        return new ContentExport.ArcDto(e.getId(), e.getName(), e.getDescription(),
+                e.getCampaignId(), e.getOrder(),
+                e.getType() != null ? e.getType().name() : null,
+                e.getIcon(), e.getThemes(), e.getStakes(), e.getGmNotes(),
+                e.getRewards(), e.getResolution(), e.getRelatedPageIds(),
+                e.getIllustrationImageIds(), e.getMapImageIds());
+    }
+
+    private ContentExport.ChapterDto toChapterDto(ChapterJpaEntity e) {
+        return new ContentExport.ChapterDto(e.getId(), e.getName(), e.getDescription(),
+                e.getArcId(), e.getOrder(), PREREQ_CONVERTER.convertToDatabaseColumn(e.getPrerequisites()), e.getIcon(),
+                e.getGmNotes(), e.getPlayerObjectives(), e.getNarrativeStakes(),
+                e.getRelatedPageIds(), e.getIllustrationImageIds(), e.getMapImageIds());
+    }
+
+    private ContentExport.SceneDto toSceneDto(SceneJpaEntity e) {
+        return new ContentExport.SceneDto(e.getId(), e.getName(), e.getDescription(),
+                e.getChapterId(), e.getOrder(), e.getIcon(), e.getLocation(),
+                e.getTiming(), e.getAtmosphere(), e.getPlayerNarration(),
+                e.getGmSecretNotes(), e.getChoicesConsequences(), e.getCombatDifficulty(),
+                e.getEnemies(), e.getEnemyIds(), e.getRelatedPageIds(),
+                e.getIllustrationImageIds(), e.getMapImageIds(), e.getBranches(), e.getRooms());
+    }
+
+    private ContentExport.CharacterDto toCharacterDto(CharacterJpaEntity e) {
+        return new ContentExport.CharacterDto(e.getId(), e.getName(), e.getPortraitImageId(),
+                e.getHeaderImageId(), e.getValues(), e.getImageValues(), e.getKeyValueValues(),
+                e.getCampaignId(), e.getPlaythroughId(), e.getOrder());
+    }
+
+    private ContentExport.NpcDto toNpcDto(NpcJpaEntity e) {
+        return new ContentExport.NpcDto(e.getId(), e.getName(), e.getPortraitImageId(),
+                e.getHeaderImageId(), e.getValues(), e.getImageValues(), e.getKeyValueValues(),
+                e.getCampaignId(), e.getRelatedPageIds(), e.getFolder(), e.getOrder());
+    }
+
+    private ContentExport.EnemyDto toEnemyDto(EnemyJpaEntity e) {
+        return new ContentExport.EnemyDto(e.getId(), e.getName(), e.getLevel(), e.getFolder(),
+                e.getPortraitImageId(), e.getHeaderImageId(), e.getValues(), e.getImageValues(),
+                e.getKeyValueValues(), e.getCampaignId(), e.getOrder());
+    }
+
+    private ContentExport.ItemCatalogDto toItemCatalogDto(ItemCatalogJpaEntity e) {
+        List<ContentExport.CatalogItemDto> items = new ArrayList<>();
+        if (e.getItems() != null) {
+            for (CatalogItemJpaEntity i : e.getItems()) {
+                items.add(new ContentExport.CatalogItemDto(i.getId(), i.getName(),
+                        i.getPrice(), i.getCategory(), i.getDescription(), i.getPosition()));
+            }
+        }
+        return new ContentExport.ItemCatalogDto(e.getId(), e.getName(), e.getDescription(),
+                e.getIcon(), e.getCampaignId(), e.getOrder(), items);
+    }
+
+    private ContentExport.RandomTableDto toRandomTableDto(RandomTableJpaEntity e) {
+        List<ContentExport.RandomTableEntryDto> entries = new ArrayList<>();
+        if (e.getEntries() != null) {
+            for (RandomTableEntryJpaEntity en : e.getEntries()) {
+                entries.add(new ContentExport.RandomTableEntryDto(en.getId(), en.getMinRoll(),
+                        en.getMaxRoll(), en.getLabel(), en.getDetail(), en.getPosition()));
+            }
+        }
+        return new ContentExport.RandomTableDto(e.getId(), e.getName(), e.getDescription(),
+                e.getDiceFormula(), e.getIcon(), e.getCampaignId(), e.getOrder(), entries);
+    }
+
+    private ContentExport.ImageDto toImageDto(ImageJpaEntity e) {
+        return new ContentExport.ImageDto(e.getId(), e.getFilename(), e.getContentType(),
+                e.getSizeBytes(), e.getStorageKey());
+    }
+}

core/src/main/java/com/loremind/infrastructure/transfer/ImportResult.java

@@ -0,0 +1,29 @@
+package com.loremind.infrastructure.transfer;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+/**
+ * Resume d'un import : nombre d'entites creees par type, + nombre d'images
+ * reuploadees / reutilisees.
+ */
+public record ImportResult(Map<String, Integer> created, int imagesUploaded, int imagesReused) {
+
+    public static class Builder {
+        private final Map<String, Integer> created = new LinkedHashMap<>();
+        private int imagesUploaded;
+        private int imagesReused;
+
+        public void count(String type, int n) {
+            created.merge(type, n, Integer::sum);
+        }
+
+        public void imageUploaded() { imagesUploaded++; }
+
+        public void imageReused() { imagesReused++; }
+
+        public ImportResult build() {
+            return new ImportResult(created, imagesUploaded, imagesReused);
+        }
+    }
+}

core/src/main/java/com/loremind/infrastructure/transfer/ImportService.java

@@ -0,0 +1,616 @@
+package com.loremind.infrastructure.transfer;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.loremind.domain.campaigncontext.Prerequisite;
+import com.loremind.domain.campaigncontext.SceneBranch;
+import com.loremind.domain.images.ports.ImageStorage;
+import com.loremind.infrastructure.persistence.converter.PrerequisiteListJsonConverter;
+import com.loremind.infrastructure.persistence.entity.*;
+import com.loremind.infrastructure.persistence.jpa.*;
+import com.loremind.infrastructure.transfer.dto.ContentExport;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+/**
+ * Service d'IMPORT de contenu en mode FUSION.
+ * <p>
+ * On NE remplace PAS l'existant : chaque entite importee est reinseree avec un
+ * NOUVEL id auto-genere, et toutes les references (FK Long et refs faibles
+ * String) sont remappees oldId -> newId. Cela permet d'agreger plusieurs exports
+ * dans une meme base sans collision, entre Postgres et H2.
+ * <p>
+ * Algorithme :
+ * <ol>
+ *   <li>Parse le zip : {@code data.json} -> {@link ContentExport}, binaires gardes en memoire.</li>
+ *   <li>Reecrit les images sous LEUR CLE D'ORIGINE (pas de remapping de cle) ;
+ *       skip si une ImageJpaEntity avec cette cle existe deja.</li>
+ *   <li>Insere top-down en construisant les maps de remapping par type.</li>
+ *   <li>2e passe : remappe les references qui pointent vers des types inserees
+ *       plus tard (parentId, defaultNodeId, refs faibles String) puis re-save.</li>
+ * </ol>
+ * Les references vers un id absent des maps (ex. relatedPageId hors export) sont
+ * CONSERVEES telles quelles (choix : ne pas perdre d'info, ne jamais planter).
+ */
+@Service
+public class ImportService {
+
+    // (Dé)sérialise les prérequis dans le format "kind" du converter JPA (Prerequisite
+    // est scellé, non sérialisable en polymorphe par l'ObjectMapper standard).
+    private static final PrerequisiteListJsonConverter PREREQ_CONVERTER = new PrerequisiteListJsonConverter();
+
+    private final GameSystemJpaRepository gameSystemRepo;
+    private final LoreJpaRepository loreRepo;
+    private final LoreNodeJpaRepository loreNodeRepo;
+    private final TemplateJpaRepository templateRepo;
+    private final PageJpaRepository pageRepo;
+    private final CampaignJpaRepository campaignRepo;
+    private final ArcJpaRepository arcRepo;
+    private final ChapterJpaRepository chapterRepo;
+    private final SceneJpaRepository sceneRepo;
+    private final CharacterJpaRepository characterRepo;
+    private final NpcJpaRepository npcRepo;
+    private final EnemyJpaRepository enemyRepo;
+    private final ItemCatalogJpaRepository itemCatalogRepo;
+    private final RandomTableJpaRepository randomTableRepo;
+    private final ImageJpaRepository imageRepo;
+    private final ImageStorage imageStorage;
+    private final ObjectMapper objectMapper;
+
+    public ImportService(GameSystemJpaRepository gameSystemRepo,
+                         LoreJpaRepository loreRepo,
+                         LoreNodeJpaRepository loreNodeRepo,
+                         TemplateJpaRepository templateRepo,
+                         PageJpaRepository pageRepo,
+                         CampaignJpaRepository campaignRepo,
+                         ArcJpaRepository arcRepo,
+                         ChapterJpaRepository chapterRepo,
+                         SceneJpaRepository sceneRepo,
+                         CharacterJpaRepository characterRepo,
+                         NpcJpaRepository npcRepo,
+                         EnemyJpaRepository enemyRepo,
+                         ItemCatalogJpaRepository itemCatalogRepo,
+                         RandomTableJpaRepository randomTableRepo,
+                         ImageJpaRepository imageRepo,
+                         ImageStorage imageStorage,
+                         ObjectMapper objectMapper) {
+        this.gameSystemRepo = gameSystemRepo;
+        this.loreRepo = loreRepo;
+        this.loreNodeRepo = loreNodeRepo;
+        this.templateRepo = templateRepo;
+        this.pageRepo = pageRepo;
+        this.campaignRepo = campaignRepo;
+        this.arcRepo = arcRepo;
+        this.chapterRepo = chapterRepo;
+        this.sceneRepo = sceneRepo;
+        this.characterRepo = characterRepo;
+        this.npcRepo = npcRepo;
+        this.enemyRepo = enemyRepo;
+        this.itemCatalogRepo = itemCatalogRepo;
+        this.randomTableRepo = randomTableRepo;
+        this.imageRepo = imageRepo;
+        this.imageStorage = imageStorage;
+        this.objectMapper = objectMapper;
+    }
+
+    @Transactional
+    public ImportResult importZip(InputStream zipStream) {
+        // 1. Parse du zip.
+        ContentExport export = null;
+        Map<String, byte[]> imageBinaries = new LinkedHashMap<>(); // storageKey -> binaire
+        try (ZipInputStream zip = new ZipInputStream(zipStream)) {
+            ZipEntry entry;
+            while ((entry = zip.getNextEntry()) != null) {
+                String name = entry.getName();
+                if ("data.json".equals(name)) {
+                    export = objectMapper.readValue(readAll(zip), ContentExport.class);
+                } else if (name.startsWith("images/") && !entry.isDirectory()) {
+                    // La cle de stockage est le chemin sans le prefixe "images/" du zip,
+                    // c'est-a-dire EXACTEMENT le storageKey d'origine ("images/UUID.ext").
+                    String storageKey = name.substring("images/".length());
+                    imageBinaries.put(storageKey, readAll(zip));
+                }
+                // manifest.json : ignore a l'import (info seulement).
+                zip.closeEntry();
+            }
+        } catch (IOException e) {
+            throw new UncheckedIOException("Echec de lecture du zip d'import", e);
+        }
+        if (export == null) {
+            throw new IllegalArgumentException("Archive invalide : data.json introuvable");
+        }
+
+        ImportResult.Builder result = new ImportResult.Builder();
+
+        // 2. Reecriture des images (cle preservee).
+        importImages(export, imageBinaries, result);
+
+        // 3. Insertion top-down + maps de remapping.
+        Map<Long, Long> gameSystemMap = new HashMap<>();
+        Map<Long, Long> loreMap = new HashMap<>();
+        Map<Long, Long> loreNodeMap = new HashMap<>();
+        Map<Long, Long> templateMap = new HashMap<>();
+        Map<Long, Long> pageMap = new HashMap<>();
+        Map<Long, Long> campaignMap = new HashMap<>();
+        Map<Long, Long> arcMap = new HashMap<>();
+        Map<Long, Long> chapterMap = new HashMap<>();
+        Map<Long, Long> npcMap = new HashMap<>();
+        Map<Long, Long> enemyMap = new HashMap<>();
+        Map<Long, Long> characterMap = new HashMap<>();
+        Map<Long, Long> sceneMap = new HashMap<>();
+
+        // -- GameSystem
+        for (ContentExport.GameSystemDto d : nullSafe(export.gameSystems())) {
+            GameSystemJpaEntity e = new GameSystemJpaEntity();
+            e.setName(d.name());
+            e.setDescription(d.description());
+            e.setRulesMarkdown(d.rulesMarkdown());
+            e.setCharacterTemplate(d.characterTemplate());
+            e.setNpcTemplate(d.npcTemplate());
+            e.setEnemyTemplate(d.enemyTemplate());
+            e.setAuthor(d.author());
+            e.setPublic(d.isPublic());
+            gameSystemMap.put(d.id(), gameSystemRepo.save(e).getId());
+        }
+        result.count("gameSystems", gameSystemMap.size());
+
+        // -- Lore
+        for (ContentExport.LoreDto d : nullSafe(export.lores())) {
+            LoreJpaEntity e = new LoreJpaEntity();
+            e.setName(d.name());
+            e.setDescription(d.description());
+            e.setNodeCount(d.nodeCount());
+            e.setPageCount(d.pageCount());
+            loreMap.put(d.id(), loreRepo.save(e).getId());
+        }
+        result.count("lores", loreMap.size());
+
+        // -- LoreNode (parentId remappe en 2e passe)
+        List<LoreNodeJpaEntity> loreNodesToFix = new ArrayList<>();
+        for (ContentExport.LoreNodeDto d : nullSafe(export.loreNodes())) {
+            LoreNodeJpaEntity e = new LoreNodeJpaEntity();
+            e.setName(d.name());
+            e.setIcon(d.icon());
+            e.setParentId(d.parentId()); // remappe plus bas
+            e.setLoreId(remapRequired(loreMap, d.loreId()));
+            LoreNodeJpaEntity saved = loreNodeRepo.save(e);
+            loreNodeMap.put(d.id(), saved.getId());
+            if (d.parentId() != null) loreNodesToFix.add(saved);
+        }
+        result.count("loreNodes", loreNodeMap.size());
+
+        // -- Template (defaultNodeId remappe en 2e passe)
+        List<ContentExport.TemplateDto> templatesWithDefaultNode = new ArrayList<>();
+        for (ContentExport.TemplateDto d : nullSafe(export.templates())) {
+            TemplateJpaEntity e = new TemplateJpaEntity();
+            e.setLoreId(remapRequired(loreMap, d.loreId()));
+            e.setName(d.name());
+            e.setDescription(d.description());
+            e.setDefaultNodeId(d.defaultNodeId()); // remappe plus bas
+            e.setFields(d.fields());
+            templateMap.put(d.id(), templateRepo.save(e).getId());
+            if (d.defaultNodeId() != null) templatesWithDefaultNode.add(d);
+        }
+        result.count("templates", templateMap.size());
+
+        // -- Page (relatedPageIds remappe en 2e passe)
+        for (ContentExport.PageDto d : nullSafe(export.pages())) {
+            PageJpaEntity e = new PageJpaEntity();
+            e.setLoreId(remapRequired(loreMap, d.loreId()));
+            e.setNodeId(remapRequired(loreNodeMap, d.nodeId()));
+            e.setTemplateId(remapNullable(templateMap, d.templateId()));
+            e.setTitle(d.title());
+            e.setValues(d.values());
+            e.setImageValues(d.imageValues());
+            e.setKeyValueValues(d.keyValueValues());
+            e.setTableValues(d.tableValues());
+            e.setNotes(d.notes());
+            e.setTags(d.tags());
+            e.setRelatedPageIds(d.relatedPageIds()); // remappe plus bas
+            pageMap.put(d.id(), pageRepo.save(e).getId());
+        }
+        result.count("pages", pageMap.size());
+
+        // -- Campaign (loreId/gameSystemId String remappes en 2e passe)
+        for (ContentExport.CampaignDto d : nullSafe(export.campaigns())) {
+            CampaignJpaEntity e = new CampaignJpaEntity();
+            e.setName(d.name());
+            e.setDescription(d.description());
+            e.setArcsCount(d.arcsCount());
+            e.setLoreId(d.loreId());             // remappe plus bas
+            e.setGameSystemId(d.gameSystemId()); // remappe plus bas
+            campaignMap.put(d.id(), campaignRepo.save(e).getId());
+        }
+        result.count("campaigns", campaignMap.size());
+
+        // -- Arc (relatedPageIds remappe en 2e passe)
+        for (ContentExport.ArcDto d : nullSafe(export.arcs())) {
+            ArcJpaEntity e = new ArcJpaEntity();
+            e.setName(d.name());
+            e.setDescription(d.description());
+            e.setCampaignId(remapRequired(campaignMap, d.campaignId()));
+            e.setOrder(d.order());
+            e.setType(parseArcType(d.type()));
+            e.setIcon(d.icon());
+            e.setThemes(d.themes());
+            e.setStakes(d.stakes());
+            e.setGmNotes(d.gmNotes());
+            e.setRewards(d.rewards());
+            e.setResolution(d.resolution());
+            e.setRelatedPageIds(d.relatedPageIds()); // remappe plus bas
+            e.setIllustrationImageIds(d.illustrationImageIds());
+            e.setMapImageIds(d.mapImageIds());
+            arcMap.put(d.id(), arcRepo.save(e).getId());
+        }
+        result.count("arcs", arcMap.size());
+
+        // -- ItemCatalog (+ items en cascade)
+        int catalogCount = 0, itemCount = 0;
+        for (ContentExport.ItemCatalogDto d : nullSafe(export.itemCatalogs())) {
+            ItemCatalogJpaEntity e = new ItemCatalogJpaEntity();
+            e.setName(d.name());
+            e.setDescription(d.description());
+            e.setIcon(d.icon());
+            e.setCampaignId(remapRequired(campaignMap, d.campaignId()));
+            e.setOrder(d.order());
+            List<CatalogItemJpaEntity> items = new ArrayList<>();
+            for (ContentExport.CatalogItemDto i : nullSafe(d.items())) {
+                CatalogItemJpaEntity item = new CatalogItemJpaEntity();
+                item.setName(i.name());
+                item.setPrice(i.price());
+                item.setCategory(i.category());
+                item.setDescription(i.description());
+                item.setPosition(i.position());
+                item.setCatalog(e); // lien parent requis pour la cascade
+                items.add(item);
+                itemCount++;
+            }
+            e.setItems(items);
+            itemCatalogRepo.save(e);
+            catalogCount++;
+        }
+        result.count("itemCatalogs", catalogCount);
+        result.count("catalogItems", itemCount);
+
+        // -- RandomTable (+ entries en cascade)
+        int tableCount = 0, entryCount = 0;
+        for (ContentExport.RandomTableDto d : nullSafe(export.randomTables())) {
+            RandomTableJpaEntity e = new RandomTableJpaEntity();
+            e.setName(d.name());
+            e.setDescription(d.description());
+            e.setDiceFormula(d.diceFormula());
+            e.setIcon(d.icon());
+            e.setCampaignId(remapRequired(campaignMap, d.campaignId()));
+            e.setOrder(d.order());
+            List<RandomTableEntryJpaEntity> entries = new ArrayList<>();
+            for (ContentExport.RandomTableEntryDto en : nullSafe(d.entries())) {
+                RandomTableEntryJpaEntity entryE = new RandomTableEntryJpaEntity();
+                entryE.setMinRoll(en.minRoll());
+                entryE.setMaxRoll(en.maxRoll());
+                entryE.setLabel(en.label());
+                entryE.setDetail(en.detail());
+                entryE.setPosition(en.position());
+                entryE.setRandomTable(e);
+                entries.add(entryE);
+                entryCount++;
+            }
+            e.setEntries(entries);
+            randomTableRepo.save(e);
+            tableCount++;
+        }
+        result.count("randomTables", tableCount);
+        result.count("randomTableEntries", entryCount);
+
+        // -- Chapter (prerequisites + relatedPageIds remappes en 2e passe)
+        for (ContentExport.ChapterDto d : nullSafe(export.chapters())) {
+            ChapterJpaEntity e = new ChapterJpaEntity();
+            e.setName(d.name());
+            e.setDescription(d.description());
+            e.setArcId(remapRequired(arcMap, d.arcId()));
+            e.setOrder(d.order());
+            e.setPrerequisites(PREREQ_CONVERTER.convertToEntityAttribute(d.prerequisitesJson())); // remappe plus bas
+            e.setIcon(d.icon());
+            e.setGmNotes(d.gmNotes());
+            e.setPlayerObjectives(d.playerObjectives());
+            e.setNarrativeStakes(d.narrativeStakes());
+            e.setRelatedPageIds(d.relatedPageIds()); // remappe plus bas
+            e.setIllustrationImageIds(d.illustrationImageIds());
+            e.setMapImageIds(d.mapImageIds());
+            chapterMap.put(d.id(), chapterRepo.save(e).getId());
+        }
+        result.count("chapters", chapterMap.size());
+
+        // -- Npc (relatedPageIds remappe en 2e passe)
+        for (ContentExport.NpcDto d : nullSafe(export.npcs())) {
+            NpcJpaEntity e = new NpcJpaEntity();
+            e.setName(d.name());
+            e.setPortraitImageId(d.portraitImageId());
+            e.setHeaderImageId(d.headerImageId());
+            e.setValues(d.values());
+            e.setImageValues(d.imageValues());
+            e.setKeyValueValues(d.keyValueValues());
+            e.setCampaignId(remapRequired(campaignMap, d.campaignId()));
+            e.setRelatedPageIds(d.relatedPageIds()); // remappe plus bas
+            e.setFolder(d.folder());
+            e.setOrder(d.order());
+            npcMap.put(d.id(), npcRepo.save(e).getId());
+        }
+        result.count("npcs", npcMap.size());
+
+        // -- Enemy
+        for (ContentExport.EnemyDto d : nullSafe(export.enemies())) {
+            EnemyJpaEntity e = new EnemyJpaEntity();
+            e.setName(d.name());
+            e.setLevel(d.level());
+            e.setFolder(d.folder());
+            e.setPortraitImageId(d.portraitImageId());
+            e.setHeaderImageId(d.headerImageId());
+            e.setValues(d.values());
+            e.setImageValues(d.imageValues());
+            e.setKeyValueValues(d.keyValueValues());
+            e.setCampaignId(remapRequired(campaignMap, d.campaignId()));
+            e.setOrder(d.order());
+            enemyMap.put(d.id(), enemyRepo.save(e).getId());
+        }
+        result.count("enemies", enemyMap.size());
+
+        // -- Character (playthroughId mis a null : hors perimetre)
+        for (ContentExport.CharacterDto d : nullSafe(export.characters())) {
+            CharacterJpaEntity e = new CharacterJpaEntity();
+            e.setName(d.name());
+            e.setPortraitImageId(d.portraitImageId());
+            e.setHeaderImageId(d.headerImageId());
+            e.setValues(d.values());
+            e.setImageValues(d.imageValues());
+            e.setKeyValueValues(d.keyValueValues());
+            e.setCampaignId(remapNullable(campaignMap, d.campaignId()));
+            e.setPlaythroughId(null); // Playthrough hors perimetre d'export
+            e.setOrder(d.order());
+            characterMap.put(d.id(), characterRepo.save(e).getId());
+        }
+        result.count("characters", characterMap.size());
+
+        // -- Scene (enemyIds + relatedPageIds + branches remappes en 2e passe)
+        for (ContentExport.SceneDto d : nullSafe(export.scenes())) {
+            SceneJpaEntity e = new SceneJpaEntity();
+            e.setName(d.name());
+            e.setDescription(d.description());
+            e.setChapterId(remapRequired(chapterMap, d.chapterId()));
+            e.setOrder(d.order());
+            e.setIcon(d.icon());
+            e.setLocation(d.location());
+            e.setTiming(d.timing());
+            e.setAtmosphere(d.atmosphere());
+            e.setPlayerNarration(d.playerNarration());
+            e.setGmSecretNotes(d.gmSecretNotes());
+            e.setChoicesConsequences(d.choicesConsequences());
+            e.setCombatDifficulty(d.combatDifficulty());
+            e.setEnemies(d.enemies());
+            e.setEnemyIds(d.enemyIds());            // remappe plus bas
+            e.setRelatedPageIds(d.relatedPageIds()); // remappe plus bas
+            e.setIllustrationImageIds(d.illustrationImageIds());
+            e.setMapImageIds(d.mapImageIds());
+            e.setBranches(d.branches());             // remappe plus bas
+            e.setRooms(d.rooms());                   // Rooms: UUID, non remappes
+            sceneMap.put(d.id(), sceneRepo.save(e).getId());
+        }
+        result.count("scenes", sceneMap.size());
+
+        // 4. 2e PASSE de remapping.
+
+        // LoreNode.parentId
+        for (LoreNodeJpaEntity e : loreNodesToFix) {
+            Long newParent = loreNodeMap.get(e.getParentId());
+            if (newParent != null) {
+                e.setParentId(newParent);
+                loreNodeRepo.save(e);
+            }
+        }
+
+        // Template.defaultNodeId
+        for (ContentExport.TemplateDto d : templatesWithDefaultNode) {
+            Long newTemplateId = templateMap.get(d.id());
+            Long newNode = loreNodeMap.get(d.defaultNodeId());
+            if (newTemplateId != null && newNode != null) {
+                templateRepo.findById(newTemplateId).ifPresent(t -> {
+                    t.setDefaultNodeId(newNode);
+                    templateRepo.save(t);
+                });
+            }
+        }
+
+        // Campaign.loreId & gameSystemId (refs faibles String -> remap via maps Long).
+        for (Long newCampaignId : campaignMap.values()) {
+            campaignRepo.findById(newCampaignId).ifPresent(c -> {
+                String newLore = remapStringId(loreMap, c.getLoreId());
+                String newGs = remapStringId(gameSystemMap, c.getGameSystemId());
+                c.setLoreId(newLore);
+                c.setGameSystemId(newGs);
+                campaignRepo.save(c);
+            });
+        }
+
+        // Page.relatedPageIds
+        for (Long newPageId : pageMap.values()) {
+            pageRepo.findById(newPageId).ifPresent(p -> {
+                p.setRelatedPageIds(remapStringList(pageMap, p.getRelatedPageIds()));
+                pageRepo.save(p);
+            });
+        }
+
+        // Arc.relatedPageIds
+        for (Long newArcId : arcMap.values()) {
+            arcRepo.findById(newArcId).ifPresent(a -> {
+                a.setRelatedPageIds(remapStringList(pageMap, a.getRelatedPageIds()));
+                arcRepo.save(a);
+            });
+        }
+
+        // Chapter.relatedPageIds + prerequisites(QuestCompleted -> map Chapter)
+        for (Long newChapterId : chapterMap.values()) {
+            chapterRepo.findById(newChapterId).ifPresent(c -> {
+                c.setRelatedPageIds(remapStringList(pageMap, c.getRelatedPageIds()));
+                c.setPrerequisites(remapPrerequisites(chapterMap, c.getPrerequisites()));
+                chapterRepo.save(c);
+            });
+        }
+
+        // Npc.relatedPageIds
+        for (Long newNpcId : npcMap.values()) {
+            npcRepo.findById(newNpcId).ifPresent(n -> {
+                n.setRelatedPageIds(remapStringList(pageMap, n.getRelatedPageIds()));
+                npcRepo.save(n);
+            });
+        }
+
+        // Scene.relatedPageIds + enemyIds(map Enemy) + branches.targetSceneId(map Scene)
+        for (Long newSceneId : sceneMap.values()) {
+            sceneRepo.findById(newSceneId).ifPresent(s -> {
+                s.setRelatedPageIds(remapStringList(pageMap, s.getRelatedPageIds()));
+                s.setEnemyIds(remapStringList(enemyMap, s.getEnemyIds()));
+                s.setBranches(remapBranches(sceneMap, s.getBranches()));
+                sceneRepo.save(s);
+            });
+        }
+
+        return result.build();
+    }
+
+    // ----- Images -----
+
+    private void importImages(ContentExport export,
+                              Map<String, byte[]> imageBinaries,
+                              ImportResult.Builder result) {
+        // Index des metadonnees d'image par cle (depuis le data.json).
+        Map<String, ContentExport.ImageDto> metaByKey = new HashMap<>();
+        for (ContentExport.ImageDto img : nullSafe(export.images())) {
+            if (img.storageKey() != null) metaByKey.put(img.storageKey(), img);
+        }
+
+        for (Map.Entry<String, byte[]> bin : imageBinaries.entrySet()) {
+            String storageKey = bin.getKey();
+            byte[] data = bin.getValue();
+            if (imageRepo.findByStorageKey(storageKey).isPresent()) {
+                // Image deja presente : on reutilise, pas de reupload (eviter doublon).
+                result.imageReused();
+                continue;
+            }
+            ContentExport.ImageDto meta = metaByKey.get(storageKey);
+            String contentType = meta != null && meta.contentType() != null
+                    ? meta.contentType() : guessContentType(storageKey);
+            long size = meta != null ? meta.sizeBytes() : data.length;
+
+            imageStorage.store(storageKey, contentType, new ByteArrayInputStream(data), data.length);
+
+            ImageJpaEntity e = new ImageJpaEntity();
+            e.setFilename(meta != null && meta.filename() != null
+                    ? meta.filename() : fileNameOf(storageKey));
+            e.setContentType(contentType);
+            e.setSizeBytes(size);
+            e.setStorageKey(storageKey);
+            imageRepo.save(e);
+            result.imageUploaded();
+        }
+    }
+
+    // ----- Helpers de remapping -----
+
+    /** Remap obligatoire d'une FK Long : si absente de la map, on garde l'ancienne valeur. */
+    private Long remapRequired(Map<Long, Long> map, Long oldId) {
+        if (oldId == null) return null;
+        return map.getOrDefault(oldId, oldId);
+    }
+
+    /** Remap d'une FK Long nullable : null reste null. */
+    private Long remapNullable(Map<Long, Long> map, Long oldId) {
+        if (oldId == null) return null;
+        return map.getOrDefault(oldId, oldId);
+    }
+
+    /** Remap d'un id stocke en String ("oldLong" -> "newLong") via une map Long. */
+    private String remapStringId(Map<Long, Long> map, String oldId) {
+        if (oldId == null || oldId.isBlank()) return oldId;
+        try {
+            Long newId = map.get(Long.parseLong(oldId.trim()));
+            return newId != null ? String.valueOf(newId) : oldId;
+        } catch (NumberFormatException ex) {
+            return oldId; // pas un Long : on laisse tel quel
+        }
+    }
+
+    private List<String> remapStringList(Map<Long, Long> map, List<String> ids) {
+        if (ids == null) return null;
+        List<String> out = new ArrayList<>(ids.size());
+        for (String id : ids) out.add(remapStringId(map, id));
+        return out;
+    }
+
+    private List<Prerequisite> remapPrerequisites(Map<Long, Long> chapterMap, List<Prerequisite> prereqs) {
+        if (prereqs == null) return null;
+        List<Prerequisite> out = new ArrayList<>(prereqs.size());
+        for (Prerequisite p : prereqs) {
+            if (p instanceof Prerequisite.QuestCompleted qc) {
+                out.add(new Prerequisite.QuestCompleted(remapStringId(chapterMap, qc.questId())));
+            } else {
+                out.add(p); // FlagSet / SessionReached : inchanges
+            }
+        }
+        return out;
+    }
+
+    private List<SceneBranch> remapBranches(Map<Long, Long> sceneMap, List<SceneBranch> branches) {
+        if (branches == null) return null;
+        List<SceneBranch> out = new ArrayList<>(branches.size());
+        for (SceneBranch b : branches) {
+            out.add(new SceneBranch(b.label(), remapStringId(sceneMap, b.targetSceneId()), b.condition()));
+        }
+        return out;
+    }
+
+    private com.loremind.domain.campaigncontext.ArcType parseArcType(String type) {
+        if (type == null) return com.loremind.domain.campaigncontext.ArcType.LINEAR;
+        try {
+            return com.loremind.domain.campaigncontext.ArcType.valueOf(type);
+        } catch (IllegalArgumentException ex) {
+            return com.loremind.domain.campaigncontext.ArcType.LINEAR;
+        }
+    }
+
+    // ----- Helpers divers -----
+
+    private static <T> List<T> nullSafe(List<T> list) {
+        return list != null ? list : List.of();
+    }
+
+    private static byte[] readAll(InputStream in) throws IOException {
+        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+        in.transferTo(buffer);
+        return buffer.toByteArray();
+    }
+
+    private static String fileNameOf(String storageKey) {
+        int slash = storageKey.lastIndexOf('/');
+        return slash >= 0 ? storageKey.substring(slash + 1) : storageKey;
+    }
+
+    private static String guessContentType(String storageKey) {
+        String lower = storageKey.toLowerCase();
+        if (lower.endsWith(".png")) return "image/png";
+        if (lower.endsWith(".gif")) return "image/gif";
+        if (lower.endsWith(".webp")) return "image/webp";
+        if (lower.endsWith(".jpg") || lower.endsWith(".jpeg")) return "image/jpeg";
+        return "application/octet-stream";
+    }
+}

core/src/main/java/com/loremind/infrastructure/transfer/dto/ContentExport.java

@@ -0,0 +1,265 @@
+package com.loremind.infrastructure.transfer.dto;
+
+import com.loremind.domain.campaigncontext.Room;
+import com.loremind.domain.campaigncontext.SceneBranch;
+import com.loremind.domain.shared.template.TemplateField;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Format d'export LOGIQUE (JSON) du "contenu" de LoreMind.
+ * <p>
+ * Records plats, miroirs des champs des entites JPA — volontairement DECOUPLES
+ * des entites pour la stabilite inter-versions (le schema JPA peut bouger sans
+ * casser un .zip exporte). Chaque record porte son {@code id} d'origine (Long)
+ * afin que l'import puisse construire les maps de remapping oldId -> newId.
+ * <p>
+ * Les sous-objets riches (TemplateField, Prerequisite, SceneBranch, Room)
+ * reutilisent les types domaine existants : Jackson sait les (de)serialiser
+ * (records ou Lombok), et on evite de dupliquer la structure.
+ */
+public record ContentExport(
+        Manifest manifest,
+        List<GameSystemDto> gameSystems,
+        List<LoreDto> lores,
+        List<LoreNodeDto> loreNodes,
+        List<TemplateDto> templates,
+        List<PageDto> pages,
+        List<CampaignDto> campaigns,
+        List<ArcDto> arcs,
+        List<ChapterDto> chapters,
+        List<SceneDto> scenes,
+        List<CharacterDto> characters,
+        List<NpcDto> npcs,
+        List<EnemyDto> enemies,
+        List<ItemCatalogDto> itemCatalogs,
+        List<RandomTableDto> randomTables,
+        List<ImageDto> images
+) {
+
+    /**
+     * Metadonnees de l'export. {@code exportedAt} est passe en parametre depuis
+     * la couche requete (PAS Instant.now() ici, pour rester deterministe et
+     * testable).
+     */
+    public record Manifest(
+            int formatVersion,
+            String appVersion,
+            String exportedAt
+    ) {}
+
+    public record GameSystemDto(
+            Long id,
+            String name,
+            String description,
+            String rulesMarkdown,
+            List<TemplateField> characterTemplate,
+            List<TemplateField> npcTemplate,
+            List<TemplateField> enemyTemplate,
+            String author,
+            boolean isPublic
+    ) {}
+
+    public record LoreDto(
+            Long id,
+            String name,
+            String description,
+            int nodeCount,
+            int pageCount
+    ) {}
+
+    public record LoreNodeDto(
+            Long id,
+            String name,
+            String icon,
+            Long parentId,
+            Long loreId
+    ) {}
+
+    public record TemplateDto(
+            Long id,
+            Long loreId,
+            String name,
+            String description,
+            Long defaultNodeId,
+            List<TemplateField> fields
+    ) {}
+
+    public record PageDto(
+            Long id,
+            Long loreId,
+            Long nodeId,
+            Long templateId,
+            String title,
+            Map<String, String> values,
+            Map<String, List<String>> imageValues,
+            Map<String, Map<String, String>> keyValueValues,
+            Map<String, List<Map<String, String>>> tableValues,
+            String notes,
+            List<String> tags,
+            List<String> relatedPageIds
+    ) {}
+
+    public record CampaignDto(
+            Long id,
+            String name,
+            String description,
+            int arcsCount,
+            String loreId,
+            String gameSystemId
+    ) {}
+
+    public record ArcDto(
+            Long id,
+            String name,
+            String description,
+            Long campaignId,
+            int order,
+            String type,
+            String icon,
+            String themes,
+            String stakes,
+            String gmNotes,
+            String rewards,
+            String resolution,
+            List<String> relatedPageIds,
+            List<String> illustrationImageIds,
+            List<String> mapImageIds
+    ) {}
+
+    public record ChapterDto(
+            Long id,
+            String name,
+            String description,
+            Long arcId,
+            int order,
+            // Prerequisites en JSON brut (format "kind" du converter JPA) : Prerequisite
+            // est un type scellé SANS annotations Jackson, donc impossible à (dé)sérialiser
+            // en polymorphe via l'ObjectMapper standard. On réutilise
+            // PrerequisiteListJsonConverter (format on-disk stable, identique à la base).
+            String prerequisitesJson,
+            String icon,
+            String gmNotes,
+            String playerObjectives,
+            String narrativeStakes,
+            List<String> relatedPageIds,
+            List<String> illustrationImageIds,
+            List<String> mapImageIds
+    ) {}
+
+    public record SceneDto(
+            Long id,
+            String name,
+            String description,
+            Long chapterId,
+            int order,
+            String icon,
+            String location,
+            String timing,
+            String atmosphere,
+            String playerNarration,
+            String gmSecretNotes,
+            String choicesConsequences,
+            String combatDifficulty,
+            String enemies,
+            List<String> enemyIds,
+            List<String> relatedPageIds,
+            List<String> illustrationImageIds,
+            List<String> mapImageIds,
+            List<SceneBranch> branches,
+            List<Room> rooms
+    ) {}
+
+    public record CharacterDto(
+            Long id,
+            String name,
+            String portraitImageId,
+            String headerImageId,
+            Map<String, String> values,
+            Map<String, List<String>> imageValues,
+            Map<String, Map<String, String>> keyValueValues,
+            Long campaignId,
+            Long playthroughId,
+            int order
+    ) {}
+
+    public record NpcDto(
+            Long id,
+            String name,
+            String portraitImageId,
+            String headerImageId,
+            Map<String, String> values,
+            Map<String, List<String>> imageValues,
+            Map<String, Map<String, String>> keyValueValues,
+            Long campaignId,
+            List<String> relatedPageIds,
+            String folder,
+            int order
+    ) {}
+
+    public record EnemyDto(
+            Long id,
+            String name,
+            String level,
+            String folder,
+            String portraitImageId,
+            String headerImageId,
+            Map<String, String> values,
+            Map<String, List<String>> imageValues,
+            Map<String, Map<String, String>> keyValueValues,
+            Long campaignId,
+            int order
+    ) {}
+
+    public record ItemCatalogDto(
+            Long id,
+            String name,
+            String description,
+            String icon,
+            Long campaignId,
+            int order,
+            List<CatalogItemDto> items
+    ) {}
+
+    public record CatalogItemDto(
+            Long id,
+            String name,
+            String price,
+            String category,
+            String description,
+            int position
+    ) {}
+
+    public record RandomTableDto(
+            Long id,
+            String name,
+            String description,
+            String diceFormula,
+            String icon,
+            Long campaignId,
+            int order,
+            List<RandomTableEntryDto> entries
+    ) {}
+
+    public record RandomTableEntryDto(
+            Long id,
+            int minRoll,
+            int maxRoll,
+            String label,
+            String detail,
+            int position
+    ) {}
+
+    /**
+     * Metadonnees d'une image. Le binaire voyage a part dans le zip sous
+     * {@code images/<storageKey>}. La cle est PRESERVEE telle quelle a l'import.
+     */
+    public record ImageDto(
+            Long id,
+            String filename,
+            String contentType,
+            long sizeBytes,
+            String storageKey
+    ) {}
+}

core/src/main/java/com/loremind/infrastructure/web/controller/DataTransferController.java

@@ -0,0 +1,85 @@
+package com.loremind.infrastructure.web.controller;
+
+import com.loremind.infrastructure.transfer.ExportService;
+import com.loremind.infrastructure.transfer.ImportResult;
+import com.loremind.infrastructure.transfer.ImportService;
+import com.loremind.infrastructure.transfer.dto.ContentExport;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+import org.springframework.web.server.ResponseStatusException;
+import org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBody;
+
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.time.Instant;
+
+/**
+ * Endpoints d'EXPORT / IMPORT du "contenu" (admin).
+ * <p>
+ * - {@code GET  /api/admin/data/export} : telecharge un .zip portable.<br>
+ * - {@code POST /api/admin/data/import} : importe un .zip en mode FUSION.
+ * <p>
+ * Garde le mode demo coherent avec {@code SettingsController} : ces operations
+ * sont desactivees en demo (donnees partagees, pas d'ecriture massive).
+ */
+@RestController
+@RequestMapping("/api/admin/data")
+public class DataTransferController {
+
+    private final ExportService exportService;
+    private final ImportService importService;
+    private final boolean demoMode;
+
+    public DataTransferController(ExportService exportService,
+                                 ImportService importService,
+                                 @Value("${app.demo-mode:false}") boolean demoMode) {
+        this.exportService = exportService;
+        this.importService = importService;
+        this.demoMode = demoMode;
+    }
+
+    @GetMapping(value = "/export", produces = "application/zip")
+    public ResponseEntity<StreamingResponseBody> export() {
+        guardDemoMode();
+        // Stamp de l'horodatage cote requete (PAS dans un init statique).
+        String exportedAt = Instant.now().toString();
+        ContentExport content = exportService.buildExport(exportedAt);
+
+        StreamingResponseBody body = out -> exportService.writeZip(content, out);
+
+        return ResponseEntity.ok()
+                .header(HttpHeaders.CONTENT_DISPOSITION,
+                        "attachment; filename=\"loremind-export.zip\"")
+                .contentType(MediaType.parseMediaType("application/zip"))
+                .body(body);
+    }
+
+    @PostMapping(value = "/import", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
+    public ResponseEntity<ImportResult> importData(@RequestParam("file") MultipartFile file) {
+        guardDemoMode();
+        if (file == null || file.isEmpty()) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Fichier d'import vide");
+        }
+        try {
+            ImportResult result = importService.importZip(file.getInputStream());
+            return ResponseEntity.ok(result);
+        } catch (IOException e) {
+            throw new UncheckedIOException("Echec de lecture du fichier d'import", e);
+        }
+    }
+
+    private void guardDemoMode() {
+        if (demoMode) {
+            throw new ResponseStatusException(HttpStatus.FORBIDDEN, "Data transfer disabled in demo mode");
+        }
+    }
+}

core/src/main/resources/application-local.properties

@@ -10,6 +10,22 @@
 # Surcharge UNIQUEMENT ce qui differe du profil par defaut (application.properties) :
 # le reste (timeouts, multipart, licensing...) est herite tel quel.
 
+# --- Config utilisateur editable (port + identifiants admin) ----------------
+# Charge ~/.loremind/loremind.properties s'il existe (cree au 1er lancement par
+# DesktopUserConfig). "optional:" = pas d'erreur s'il manque. Les valeurs y
+# definies (server.port, admin.username, admin.password) SURCHARGENT les defauts
+# ci-dessous (un import a une priorite superieure au fichier qui l'importe).
+# NB : le port effectif est de toute facon fixe par DesktopUserConfig au demarrage
+# (propriete systeme server.port, avec repli si le port est occupe).
+spring.config.import=optional:file:${user.home}/.loremind/loremind.properties
+
+# --- Serveur : ecoute UNIQUEMENT sur la boucle locale -----------------------
+# App de bureau mono-utilisateur : jamais exposee au reseau (securite). Et ca
+# rend coherent le test "port libre" de DesktopUserConfig (qui teste 127.0.0.1)
+# avec l'adresse de bind reelle de Tomcat -> le repli sur port libre fonctionne
+# meme si une autre appli occupe le port sur une autre interface.
+server.address=127.0.0.1
+
 # --- Base de donnees : H2 en mode fichier, compatibilite PostgreSQL ---------
 # MODE=PostgreSQL : H2 interprete le SQL PostgreSQL -> les MEMES migrations
 # Flyway (ecrites en SQL Postgres) tournent ici comme sur la prod Postgres.
@@ -56,7 +72,8 @@ brain.sidecar.command=${BRAIN_SIDECAR_COMMAND:}
 
 # --- Admin (localhost uniquement) ------------------------------------------
 # Application mono-utilisateur sur le poste : l'utilisateur EST l'admin.
-# Identifiants par defaut surchargables ; non exposes hors de la machine.
+# Defauts admin/admin, SURCHARGEABLES par l'utilisateur dans
+# ~/.loremind/loremind.properties (cf. spring.config.import ci-dessus).
 admin.username=${ADMIN_USERNAME:admin}
 admin.password=${ADMIN_PASSWORD:admin}
 

web/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "loremind-web",
-  "version": "0.15.0",
+  "version": "0.16.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "loremind-web",
-      "version": "0.15.0",
+      "version": "0.16.0",
       "dependencies": {
         "@angular/animations": "^21.2.16",
         "@angular/common": "^21.2.16",

web/package.json

@@ -1,6 +1,6 @@
 {
   "name": "loremind-web",
-  "version": "0.15.0",
+  "version": "0.16.0",
   "description": "LoreMind Frontend - Angular",
   "scripts": {
     "ng": "ng",

web/src/app/services/settings.service.ts

@@ -66,6 +66,13 @@ export interface OllamaModelInfo {
   context_length: number;
 }
 
+/** Resultat d'un import de donnees (compteurs par type + images). */
+export interface ImportResult {
+  created: Record<string, number>;
+  imagesUploaded: number;
+  imagesReused: number;
+}
+
 @Injectable({ providedIn: 'root' })
 export class SettingsService {
   private readonly apiUrl = '/api/settings';
@@ -85,6 +92,21 @@ export class SettingsService {
     return this.http.put<AppSettings>(this.apiUrl, patch, this.authOptions);
   }
 
+  // --- Export / Import des donnees (sauvegarde & transfert d'instance) -------
+
+  /** Telecharge l'export complet du contenu (zip : data.json + images). */
+  exportData(): Observable<Blob> {
+    return this.http.get('/api/admin/data/export',
+      { withCredentials: true, responseType: 'blob' });
+  }
+
+  /** Importe un zip d'export en mode FUSION (ajoute, ne remplace pas). */
+  importData(file: File): Observable<ImportResult> {
+    const form = new FormData();
+    form.append('file', file);
+    return this.http.post<ImportResult>('/api/admin/data/import', form, this.authOptions);
+  }
+
   listOllamaModels(): Observable<{ models: string[] }> {
     return this.http.get<{ models: string[] }>(`${this.apiUrl}/models/ollama`, this.authOptions);
   }

web/src/app/settings/settings.component.html

@@ -112,7 +112,7 @@
         <label for="onemin-key">{{ 'settings.apiKey.label' | translate }}</label>
         <input
           id="onemin-key"
-          type="password"
+          type="password" autocomplete="new-password" data-1p-ignore data-lpignore="true" data-bwignore
           [(ngModel)]="oneminApiKeyInput"
           [placeholder]="(settings.onemin_api_key_set ? 'settings.apiKey.placeholderSet' : 'settings.apiKey.placeholderOnemin') | translate">
           @if (settings.onemin_api_key_set) {
@@ -149,7 +149,7 @@
           <label for="openrouter-key">{{ 'settings.apiKey.label' | translate }}</label>
           <input
             id="openrouter-key"
-            type="password"
+            type="password" autocomplete="new-password" data-1p-ignore data-lpignore="true" data-bwignore
             [(ngModel)]="openrouterApiKeyInput"
             [placeholder]="(settings.openrouter_api_key_set ? 'settings.apiKey.placeholderSet' : 'settings.apiKey.placeholderOpenrouter') | translate">
             @if (settings.openrouter_api_key_set) {
@@ -183,7 +183,7 @@
             <label for="mistral-key">{{ 'settings.apiKey.label' | translate }}</label>
             <input
               id="mistral-key"
-              type="password"
+              type="password" autocomplete="new-password" data-1p-ignore data-lpignore="true" data-bwignore
               [(ngModel)]="mistralApiKeyInput"
               [placeholder]="(settings.mistral_api_key_set ? 'settings.apiKey.placeholderSet' : 'settings.apiKey.placeholderMistral') | translate">
               @if (settings.mistral_api_key_set) {
@@ -213,7 +213,7 @@
               <label for="gemini-key">{{ 'settings.apiKey.label' | translate }}</label>
               <input
                 id="gemini-key"
-                type="password"
+                type="password" autocomplete="new-password" data-1p-ignore data-lpignore="true" data-bwignore
                 [(ngModel)]="geminiApiKeyInput"
                 [placeholder]="(settings.gemini_api_key_set ? 'settings.apiKey.placeholderSet' : 'settings.apiKey.placeholderGemini') | translate">
                 @if (settings.gemini_api_key_set) {
@@ -285,7 +285,7 @@
                           <span class="key-state">{{ 'settings.apiKey.configured' | translate }}</span>
                         }
                       </label>
-                      <input id="emb-mistral-key" type="password" [(ngModel)]="mistralApiKeyInput"
+                      <input id="emb-mistral-key" type="password" autocomplete="new-password" data-1p-ignore data-lpignore="true" data-bwignore [(ngModel)]="mistralApiKeyInput"
                         [placeholder]="(settings.mistral_api_key_set ? 'settings.apiKey.placeholderSet' : 'settings.apiKey.placeholderMistral') | translate">
                         @if (settings.mistral_api_key_set) {
                           <label class="checkbox">
@@ -372,6 +372,33 @@
                       <!-- Mises a jour conteneurs + licence Patreon + canal beta (sous-composant) -->
                       <app-settings-updates-section></app-settings-updates-section>
 
+                      <!-- Sauvegarde / Restauration des donnees (export & import) -->
+                      <section class="card">
+                        <h2>{{ 'settings.data.title' | translate }}</h2>
+                        <p class="hint" [innerHTML]="'settings.data.hint' | translate"></p>
+                        <div class="actions">
+                          <button type="button" class="btn-secondary" (click)="exportData()" [disabled]="exporting || importing">
+                            <span>{{ (exporting ? 'settings.data.exporting' : 'settings.data.exportBtn') | translate }}</span>
+                          </button>
+                          <button type="button" class="btn-secondary" (click)="importInput.click()" [disabled]="exporting || importing">
+                            <span>{{ (importing ? 'settings.data.importing' : 'settings.data.importBtn') | translate }}</span>
+                          </button>
+                          <input #importInput type="file" accept=".zip,application/zip" hidden (change)="onImportFileSelected($event)">
+                        </div>
+                        @if (dataError) {
+                          <div class="alert alert-error">
+                            <lucide-icon [img]="AlertCircle" [size]="16"></lucide-icon>
+                            <span>{{ dataError }}</span>
+                          </div>
+                        }
+                        @if (dataMessage) {
+                          <div class="alert alert-success">
+                            <lucide-icon [img]="Check" [size]="16"></lucide-icon>
+                            <span>{{ dataMessage }}</span>
+                          </div>
+                        }
+                      </section>
+
                       @if (settings) {
                         <div class="actions">
                           <button class="btn-primary" (click)="save()" [disabled]="saving">

web/src/app/settings/settings.component.ts

@@ -4,7 +4,7 @@ import { FormsModule } from '@angular/forms';
 import { Router } from '@angular/router';
 import { LucideAngularModule, ArrowLeft, RefreshCw, Save, Check, AlertCircle, Plus } from 'lucide-angular';
 import { TranslatePipe, TranslateService } from '@ngx-translate/core';
-import { SettingsService, AppSettings, AppSettingsUpdate, OneMinModelGroup, OpenRouterModel, MistralModel, GeminiModel } from '../services/settings.service';
+import { SettingsService, AppSettings, AppSettingsUpdate, OneMinModelGroup, OpenRouterModel, MistralModel, GeminiModel, ImportResult } from '../services/settings.service';
 import { LayoutService } from '../services/layout.service';
 import { UpdatesSectionComponent } from './updates-section/updates-section.component';
 import { OllamaModelManagerComponent } from './ollama-model-manager/ollama-model-manager.component';
@@ -332,6 +332,60 @@ export class SettingsComponent implements OnInit {
     this.router.navigate(['/lore']);
   }
 
+  // --- Sauvegarde / Restauration des donnees --------------------------------
+
+  exporting = false;
+  importing = false;
+  dataMessage = '';
+  dataError = '';
+
+  /** Telecharge l'export complet (zip) via un lien temporaire. */
+  exportData(): void {
+    this.exporting = true;
+    this.dataMessage = '';
+    this.dataError = '';
+    this.settingsService.exportData().subscribe({
+      next: (blob) => {
+        const url = URL.createObjectURL(blob);
+        const a = document.createElement('a');
+        a.href = url;
+        a.download = 'loremind-export.zip';
+        a.click();
+        URL.revokeObjectURL(url);
+        this.exporting = false;
+      },
+      error: (err) => {
+        this.dataError = this.extractError(err, this.translate.instant('settings.data.exportError'));
+        this.exporting = false;
+      }
+    });
+  }
+
+  /** Déclenché par le sélecteur de fichier : importe le zip choisi (fusion). */
+  onImportFileSelected(event: Event): void {
+    const input = event.target as HTMLInputElement;
+    const file = input.files?.[0];
+    input.value = ''; // permet de re-sélectionner le même fichier
+    if (!file) return;
+
+    if (!confirm(this.translate.instant('settings.data.importConfirm'))) return;
+
+    this.importing = true;
+    this.dataMessage = '';
+    this.dataError = '';
+    this.settingsService.importData(file).subscribe({
+      next: (result: ImportResult) => {
+        const total = Object.values(result.created).reduce((a, b) => a + b, 0);
+        this.dataMessage = this.translate.instant('settings.data.importSuccess', { count: total });
+        this.importing = false;
+      },
+      error: (err) => {
+        this.dataError = this.extractError(err, this.translate.instant('settings.data.importError'));
+        this.importing = false;
+      }
+    });
+  }
+
   private extractError(err: any, fallback: string): string {
     if (err?.error?.detail) return String(err.error.detail);
     if (err?.message) return err.message;

web/src/assets/i18n/en.json

@@ -50,6 +50,18 @@
   },
   "settings": {
     "title": "Settings",
+    "data": {
+      "title": "Data backup",
+      "hint": "Export all your content (game systems, lores, campaigns + images) to a file, to back it up or move it to another instance. Importing <strong>adds</strong> the content without deleting what's already there.",
+      "exportBtn": "Export data",
+      "exporting": "Exporting…",
+      "importBtn": "Import a file",
+      "importing": "Importing…",
+      "importConfirm": "Import this file? Its content will be added to your instance (nothing is deleted).",
+      "importSuccess": "Import successful: {{count}} item(s) added.",
+      "exportError": "Export failed.",
+      "importError": "Import failed (invalid file?)."
+    },
     "language": {
       "title": "Interface language",
       "hint": "Choose the application display language. The change is applied instantly and remembered on this device."

web/src/assets/i18n/fr.json

@@ -50,6 +50,18 @@
   },
   "settings": {
     "title": "Paramètres",
+    "data": {
+      "title": "Sauvegarde des données",
+      "hint": "Exportez tout votre contenu (systèmes de jeu, lores, campagnes + images) dans un fichier, pour le sauvegarder ou le transférer vers une autre instance. L'import <strong>ajoute</strong> le contenu sans supprimer l'existant.",
+      "exportBtn": "Exporter les données",
+      "exporting": "Export en cours…",
+      "importBtn": "Importer un fichier",
+      "importing": "Import en cours…",
+      "importConfirm": "Importer ce fichier ? Le contenu sera ajouté à votre instance (rien n'est supprimé).",
+      "importSuccess": "Import réussi : {{count}} élément(s) ajouté(s).",
+      "exportError": "Échec de l'export.",
+      "importError": "Échec de l'import (fichier invalide ?)."
+    },
     "language": {
       "title": "Langue de l'interface",
       "hint": "Choix de la langue d'affichage de l'application. Le changement est immédiat et mémorisé sur cet appareil."