feat(ocr): promote TrainingInfoResponse to dto, add senderModels field

Move TrainingInfoResponse from private nested record to dto/TrainingInfoResponse.java,
add senderModels field, inject SenderModelService into OcrTrainingService so personNames
covers all known senders rather than only recent-run participants.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/src/main/java/org/raddatz/familienarchiv/controller/OcrController.java

@@ -4,6 +4,7 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.raddatz.familienarchiv.dto.BatchOcrDTO;
 import org.raddatz.familienarchiv.dto.OcrStatusDTO;
+import org.raddatz.familienarchiv.dto.TrainingInfoResponse;
 import org.raddatz.familienarchiv.dto.TriggerOcrDTO;
 import org.raddatz.familienarchiv.model.AppUser;
 import org.raddatz.familienarchiv.model.OcrJob;
@@ -130,7 +131,7 @@ public class OcrController {
 
     @GetMapping("/api/ocr/training-info")
     @RequirePermission(Permission.ADMIN)
-    public OcrTrainingService.TrainingInfoResponse getTrainingInfo() {
+    public TrainingInfoResponse getTrainingInfo() {
         return ocrTrainingService.getTrainingInfo();
     }
 

backend/src/main/java/org/raddatz/familienarchiv/dto/TrainingInfoResponse.java

@@ -0,0 +1,19 @@
+package org.raddatz.familienarchiv.dto;
+
+import org.raddatz.familienarchiv.model.OcrTrainingRun;
+import org.raddatz.familienarchiv.model.SenderModel;
+
+import java.util.List;
+import java.util.Map;
+
+public record TrainingInfoResponse(
+        int availableBlocks,
+        int totalOcrBlocks,
+        int availableDocuments,
+        int availableSegBlocks,
+        boolean ocrServiceAvailable,
+        OcrTrainingRun lastRun,
+        List<OcrTrainingRun> runs,
+        Map<String, String> personNames,
+        List<SenderModel> senderModels
+) {}

backend/src/main/java/org/raddatz/familienarchiv/service/OcrTrainingService.java

@@ -2,9 +2,11 @@ package org.raddatz.familienarchiv.service;
 
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.raddatz.familienarchiv.dto.TrainingInfoResponse;
 import org.raddatz.familienarchiv.exception.DomainException;
 import org.raddatz.familienarchiv.exception.ErrorCode;
 import org.raddatz.familienarchiv.model.OcrTrainingRun;
+import org.raddatz.familienarchiv.model.SenderModel;
 import org.raddatz.familienarchiv.model.TrainingStatus;
 import org.raddatz.familienarchiv.repository.OcrTrainingRunRepository;
 import org.raddatz.familienarchiv.repository.TranscriptionBlockRepository;
@@ -37,17 +39,7 @@ public class OcrTrainingService {
     private final TranscriptionBlockRepository blockRepository;
     private final TransactionTemplate txTemplate;
     private final PersonService personService;
-
-    public record TrainingInfoResponse(
-            int availableBlocks,
-            int totalOcrBlocks,
-            int availableDocuments,
-            int availableSegBlocks,
-            boolean ocrServiceAvailable,
-            OcrTrainingRun lastRun,
-            List<OcrTrainingRun> runs,
-            Map<String, String> personNames
-    ) {}
+    private final SenderModelService senderModelService;
 
     private void assertNoRunningTraining() {
         if (trainingRunRepository.findFirstByStatus(TrainingStatus.RUNNING).isPresent()) {
@@ -202,14 +194,15 @@ public class OcrTrainingService {
         List<OcrTrainingRun> recentRuns = trainingRunRepository.findTop20ByOrderByCreatedAtDesc();
         OcrTrainingRun lastRun = recentRuns.isEmpty() ? null : recentRuns.get(0);
 
-        List<UUID> distinctPersonIds = recentRuns.stream()
-                .map(OcrTrainingRun::getPersonId)
-                .filter(Objects::nonNull)
+        List<SenderModel> senderModels = senderModelService.getAllSenderModels();
+
+        List<UUID> allPersonIds = senderModels.stream()
+                .map(SenderModel::getPersonId)
                 .distinct()
                 .toList();
         Map<String, String> personNames = new HashMap<>();
-        if (!distinctPersonIds.isEmpty()) {
-            personService.getAllById(distinctPersonIds)
+        if (!allPersonIds.isEmpty()) {
+            personService.getAllById(allPersonIds)
                     .forEach(p -> personNames.put(p.getId().toString(), p.getDisplayName()));
         }
 
@@ -221,7 +214,8 @@ public class OcrTrainingService {
                 ocrHealthClient.isHealthy(),
                 lastRun,
                 recentRuns,
-                personNames
+                personNames,
+                senderModels
         );
     }
 

backend/src/main/java/org/raddatz/familienarchiv/service/SenderModelService.java

@@ -17,6 +17,7 @@ import org.springframework.transaction.support.TransactionTemplate;
 
 import java.io.ByteArrayOutputStream;
 import java.time.Instant;
+import java.util.List;
 import java.util.Objects;
 import java.util.Optional;
 import java.util.UUID;
@@ -45,6 +46,10 @@ public class SenderModelService {
                 .map(SenderModel::getModelPath);
     }
 
+    public List<SenderModel> getAllSenderModels() {
+        return senderModelRepository.findAll();
+    }
+
     /**
      * Called after every MANUAL block save for HANDWRITING_KURRENT documents.
      * Checks activation and retrain thresholds; enqueues or starts sender training when met.