feat(person): store birth/death as LocalDate + DatePrecision

Entity swap mirroring Document.metaDatePrecision; PersonUpdateDTO takes
date + precision; validateLifeDates (badRequest BIRTH_AFTER_DEATH /
INVALID_DATE_PRECISION) replaces validateYears; preferHumanDate keeps
DAY/MONTH/SEASON hand-entered dates on re-import and refreshes
YEAR/UNKNOWN from the canonical year (ADR-025 extension);
PersonUpsertCommand stays year-shaped. Native queries project
EXTRACT(YEAR ...) so PersonSummaryDTO and PersonNodeDTO stay
year-shaped, null-safe for undated persons.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

backend/src/main/java/org/raddatz/familienarchiv/person/Person.java

@@ -6,7 +6,9 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.persistence.*;
 import lombok.*;
 
+import org.raddatz.familienarchiv.document.DatePrecision;
 import org.raddatz.familienarchiv.user.DisplayNameFormatter;
+import java.time.LocalDate;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.UUID;
@@ -49,8 +51,25 @@ public class Person {
     @Column(columnDefinition = "TEXT")
     private String notes;
 
-    private Integer birthYear;
+    // Most precise birth/death date known. Precision mirrors Document.metaDatePrecision:
-    private Integer deathYear;
+    // the date column is nullable, the precision column is NOT NULL with UNKNOWN meaning
+    // "no date" — the V76 CHECK constraints enforce (date IS NULL) = (precision = UNKNOWN).
+    // DatePrecision is imported cross-domain from document/ by design (ADR-039).
+    private LocalDate birthDate;
+
+    @Enumerated(EnumType.STRING)
+    @Column(name = "birth_date_precision", nullable = false, length = 16)
+    @Schema(requiredMode = Schema.RequiredMode.REQUIRED)
+    @Builder.Default
+    private DatePrecision birthDatePrecision = DatePrecision.UNKNOWN;
+
+    private LocalDate deathDate;
+
+    @Enumerated(EnumType.STRING)
+    @Column(name = "death_date_precision", nullable = false, length = 16)
+    @Schema(requiredMode = Schema.RequiredMode.REQUIRED)
+    @Builder.Default
+    private DatePrecision deathDatePrecision = DatePrecision.UNKNOWN;
 
     // Hand-curated generation index from canonical-persons.xlsx (G 0 = oldest).
     // Nullable for persons outside the curated family graph. Drives the

backend/src/main/java/org/raddatz/familienarchiv/person/PersonRepository.java

@@ -66,7 +66,8 @@ public interface PersonRepository extends JpaRepository<Person, UUID> {
     @Query(value = """
             SELECT p.id, p.title, p.first_name AS firstName, p.last_name AS lastName,
                    p.person_type AS personType,
-                   p.alias, p.birth_year AS birthYear, p.death_year AS deathYear, p.notes,
+                   p.alias, CAST(EXTRACT(YEAR FROM p.birth_date) AS int) AS birthYear,
+                   CAST(EXTRACT(YEAR FROM p.death_date) AS int) AS deathYear, p.notes,
                    p.family_member AS familyMember, p.provisional AS provisional,
                    (SELECT COUNT(*) FROM documents d WHERE d.sender_id = p.id)
                    + (SELECT COUNT(*) FROM document_receivers dr WHERE dr.person_id = p.id) AS documentCount
@@ -79,7 +80,8 @@ public interface PersonRepository extends JpaRepository<Person, UUID> {
     @Query(value = """
             SELECT p.id, p.title, p.first_name AS firstName, p.last_name AS lastName,
                    p.person_type AS personType,
-                   p.alias, p.birth_year AS birthYear, p.death_year AS deathYear, p.notes,
+                   p.alias, CAST(EXTRACT(YEAR FROM p.birth_date) AS int) AS birthYear,
+                   CAST(EXTRACT(YEAR FROM p.death_date) AS int) AS deathYear, p.notes,
                    p.family_member AS familyMember, p.provisional AS provisional,
                    (SELECT COUNT(*) FROM documents d WHERE d.sender_id = p.id)
                    + (SELECT COUNT(*) FROM document_receivers dr WHERE dr.person_id = p.id) AS documentCount
@@ -89,7 +91,7 @@ public interface PersonRepository extends JpaRepository<Person, UUID> {
                OR LOWER(CONCAT(p.last_name,' ',COALESCE(p.first_name,''))) LIKE LOWER(CONCAT('%',:query,'%'))
                OR LOWER(p.alias) LIKE LOWER(CONCAT('%',:query,'%'))
                OR LOWER(a.last_name) LIKE LOWER(CONCAT('%',:query,'%'))
-            GROUP BY p.id, p.title, p.first_name, p.last_name, p.person_type, p.alias, p.birth_year, p.death_year, p.notes, p.family_member, p.provisional
+            GROUP BY p.id, p.title, p.first_name, p.last_name, p.person_type, p.alias, p.birth_date, p.birth_date_precision, p.death_date, p.death_date_precision, p.notes, p.family_member, p.provisional
             ORDER BY p.last_name ASC, p.first_name ASC
             """,
             nativeQuery = true)
@@ -100,7 +102,8 @@ public interface PersonRepository extends JpaRepository<Person, UUID> {
     @Query(value = """
             SELECT p.id, p.title, p.first_name AS firstName, p.last_name AS lastName,
                    p.person_type AS personType,
-                   p.alias, p.birth_year AS birthYear, p.death_year AS deathYear, p.notes,
+                   p.alias, CAST(EXTRACT(YEAR FROM p.birth_date) AS int) AS birthYear,
+                   CAST(EXTRACT(YEAR FROM p.death_date) AS int) AS deathYear, p.notes,
                    p.family_member AS familyMember, p.provisional AS provisional,
                    (SELECT COUNT(*) FROM documents d WHERE d.sender_id = p.id)
                    + (SELECT COUNT(*) FROM document_receivers dr WHERE dr.person_id = p.id) AS documentCount
@@ -139,7 +142,8 @@ public interface PersonRepository extends JpaRepository<Person, UUID> {
     @Query(value = """
             SELECT p.id, p.title, p.first_name AS firstName, p.last_name AS lastName,
                    p.person_type AS personType,
-                   p.alias, p.birth_year AS birthYear, p.death_year AS deathYear, p.notes,
+                   p.alias, CAST(EXTRACT(YEAR FROM p.birth_date) AS int) AS birthYear,
+                   CAST(EXTRACT(YEAR FROM p.death_date) AS int) AS deathYear, p.notes,
                    p.family_member AS familyMember, p.provisional AS provisional,
                    (SELECT COUNT(*) FROM documents d WHERE d.sender_id = p.id)
                    + (SELECT COUNT(*) FROM document_receivers dr WHERE dr.person_id = p.id) AS documentCount

backend/src/main/java/org/raddatz/familienarchiv/person/PersonService.java

@@ -1,5 +1,6 @@
 package org.raddatz.familienarchiv.person;
 
+import java.time.LocalDate;
 import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.LinkedHashMap;
@@ -16,6 +17,7 @@ import org.springframework.lang.Nullable;
 import org.raddatz.familienarchiv.person.PersonNameAliasDTO;
 import org.raddatz.familienarchiv.person.PersonSummaryDTO;
 import org.raddatz.familienarchiv.person.PersonUpdateDTO;
+import org.raddatz.familienarchiv.document.DatePrecision;
 import org.raddatz.familienarchiv.exception.DomainException;
 import org.raddatz.familienarchiv.exception.ErrorCode;
 import org.raddatz.familienarchiv.person.Person;
@@ -299,13 +301,17 @@ public class PersonService {
     }
 
     private Person fromCanonical(PersonUpsertCommand cmd) {
+        DatePrecisionPair birth = yearPair(cmd.birthYear());
+        DatePrecisionPair death = yearPair(cmd.deathYear());
         Person person = personRepository.save(Person.builder()
                 .sourceRef(cmd.sourceRef())
                 .firstName(blankToNull(cmd.firstName()))
                 .lastName(cmd.lastName())
                 .notes(blankToNull(cmd.notes()))
-                .birthYear(cmd.birthYear())
+                .birthDate(birth.date())
-                .deathYear(cmd.deathYear())
+                .birthDatePrecision(birth.precision())
+                .deathDate(death.date())
+                .deathDatePrecision(death.precision())
                 .generation(cmd.generation())
                 .familyMember(cmd.familyMember())
                 .personType(cmd.personType() == null ? PersonType.PERSON : cmd.personType())
@@ -328,8 +334,14 @@ public class PersonService {
         existing.setFirstName(preferHuman(existing.getFirstName(), cmd.firstName()));
         existing.setLastName(preferHuman(existing.getLastName(), cmd.lastName()));
         existing.setNotes(preferHuman(existing.getNotes(), cmd.notes()));
-        existing.setBirthYear(preferHuman(existing.getBirthYear(), cmd.birthYear()));
+        DatePrecisionPair birth = preferHumanDate(
-        existing.setDeathYear(preferHuman(existing.getDeathYear(), cmd.deathYear()));
+                existing.getBirthDate(), existing.getBirthDatePrecision(), cmd.birthYear());
+        existing.setBirthDate(birth.date());
+        existing.setBirthDatePrecision(birth.precision());
+        DatePrecisionPair death = preferHumanDate(
+                existing.getDeathDate(), existing.getDeathDatePrecision(), cmd.deathYear());
+        existing.setDeathDate(death.date());
+        existing.setDeathDatePrecision(death.precision());
         existing.setGeneration(preferHuman(existing.getGeneration(), cmd.generation()));
         if (cmd.personType() != null && existing.getPersonType() == PersonType.PERSON) {
             existing.setPersonType(cmd.personType());
@@ -356,6 +368,28 @@ public class PersonService {
         return existing != null ? existing : canonical;
     }
 
+    // Date + precision travel as one value so they can never go out of sync (ADR-039).
+    record DatePrecisionPair(LocalDate date, DatePrecision precision) {}
+
+    // preferHuman for life dates (ADR-025 extension): a hand-entered date more precise than
+    // the spreadsheet's year (DAY/MONTH/SEASON/RANGE/APPROX) is preserved on re-import; a
+    // YEAR-precision or absent date is refreshed from the canonical year.
+    static DatePrecisionPair preferHumanDate(LocalDate existingDate, DatePrecision existingPrecision,
+                                             Integer canonicalYear) {
+        boolean handEntered = existingDate != null && existingPrecision != null
+                && existingPrecision != DatePrecision.YEAR && existingPrecision != DatePrecision.UNKNOWN;
+        if (handEntered) {
+            return new DatePrecisionPair(existingDate, existingPrecision);
+        }
+        return yearPair(canonicalYear);
+    }
+
+    private static DatePrecisionPair yearPair(Integer year) {
+        return year != null
+                ? new DatePrecisionPair(LocalDate.of(year, 1, 1), DatePrecision.YEAR)
+                : new DatePrecisionPair(null, DatePrecision.UNKNOWN);
+    }
+
     private static String blankToNull(String s) {
         return (s == null || s.isBlank()) ? null : s.trim();
     }
@@ -375,7 +409,8 @@ public class PersonService {
         if (dto.getPersonType() == PersonType.SKIP) {
             throw DomainException.badRequest(ErrorCode.INVALID_PERSON_TYPE, "SKIP is not a valid person type for manual creation");
         }
-        validateYears(dto.getBirthYear(), dto.getDeathYear());
+        validateLifeDates(dto.getBirthDate(), dto.getBirthDatePrecision(),
+                dto.getDeathDate(), dto.getDeathDatePrecision());
         Person person = Person.builder()
                 .personType(dto.getPersonType())
                 .title(dto.getTitle() == null || dto.getTitle().isBlank() ? null : dto.getTitle().trim())
@@ -383,23 +418,40 @@ public class PersonService {
                 .lastName(dto.getLastName())
                 .alias(dto.getAlias() == null || dto.getAlias().isBlank() ? null : dto.getAlias().trim())
                 .notes(dto.getNotes() == null || dto.getNotes().isBlank() ? null : dto.getNotes().trim())
-                .birthYear(dto.getBirthYear())
+                .birthDate(dto.getBirthDate())
-                .deathYear(dto.getDeathYear())
+                .birthDatePrecision(normalizePrecision(dto.getBirthDatePrecision()))
+                .deathDate(dto.getDeathDate())
+                .deathDatePrecision(normalizePrecision(dto.getDeathDatePrecision()))
                 .generation(dto.getGeneration())
                 .build();
         return personRepository.save(person);
     }
 
-    private void validateYears(Integer birthYear, Integer deathYear) {
+    // Cross-field invariants the V76 CHECK constraints also enforce — validated here so the
-        if (birthYear != null && birthYear <= 0) {
+    // user gets a structured ErrorCode instead of a raw constraint-violation 500.
-            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Geburtsjahr muss eine positive Zahl sein");
+    private void validateLifeDates(LocalDate birthDate, DatePrecision birthPrecision,
+                                   LocalDate deathDate, DatePrecision deathPrecision) {
+        requireDatePrecisionCoherence(birthDate, birthPrecision, "birth");
+        requireDatePrecisionCoherence(deathDate, deathPrecision, "death");
+        if (birthDate != null && deathDate != null && birthDate.isAfter(deathDate)) {
+            throw DomainException.badRequest(ErrorCode.BIRTH_AFTER_DEATH,
+                    "Birth date " + birthDate + " is after death date " + deathDate);
         }
-        if (deathYear != null && deathYear <= 0) {
-            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Todesjahr muss eine positive Zahl sein");
     }
-        if (birthYear != null && deathYear != null && birthYear > deathYear) {
+
-            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Geburtsjahr darf nicht nach dem Todesjahr liegen");
+    private static void requireDatePrecisionCoherence(LocalDate date, DatePrecision precision, String side) {
+        if (date != null && (precision == null || precision == DatePrecision.UNKNOWN)) {
+            throw DomainException.badRequest(ErrorCode.INVALID_DATE_PRECISION,
+                    side + " date is set but its precision is missing or UNKNOWN");
         }
+        if (date == null && precision != null && precision != DatePrecision.UNKNOWN) {
+            throw DomainException.badRequest(ErrorCode.INVALID_DATE_PRECISION,
+                    side + " date precision " + precision + " is set without a date");
+        }
+    }
+
+    private static DatePrecision normalizePrecision(DatePrecision precision) {
+        return precision == null ? DatePrecision.UNKNOWN : precision;
     }
 
     @Transactional
@@ -407,7 +459,8 @@ public class PersonService {
         if (dto.getPersonType() == PersonType.SKIP) {
             throw DomainException.badRequest(ErrorCode.INVALID_PERSON_TYPE, "SKIP is not a valid person type for manual editing");
         }
-        validateYears(dto.getBirthYear(), dto.getDeathYear());
+        validateLifeDates(dto.getBirthDate(), dto.getBirthDatePrecision(),
+                dto.getDeathDate(), dto.getDeathDatePrecision());
         Person person = personRepository.findById(id)
                 .orElseThrow(() -> DomainException.notFound(ErrorCode.PERSON_NOT_FOUND, "Person not found: " + id));
         person.setPersonType(dto.getPersonType());
@@ -416,8 +469,10 @@ public class PersonService {
         person.setLastName(dto.getLastName());
         person.setAlias(dto.getAlias() == null || dto.getAlias().isBlank() ? null : dto.getAlias().trim());
         person.setNotes(dto.getNotes() == null || dto.getNotes().isBlank() ? null : dto.getNotes().trim());
-        person.setBirthYear(dto.getBirthYear());
+        person.setBirthDate(dto.getBirthDate());
-        person.setDeathYear(dto.getDeathYear());
+        person.setBirthDatePrecision(normalizePrecision(dto.getBirthDatePrecision()));
+        person.setDeathDate(dto.getDeathDate());
+        person.setDeathDatePrecision(normalizePrecision(dto.getDeathDatePrecision()));
         // Form path: a human can clear generation back to null. Unlike the importer
         // which routes through preferHuman, we write the DTO value verbatim.
         person.setGeneration(dto.getGeneration());

backend/src/main/java/org/raddatz/familienarchiv/person/PersonUpdateDTO.java

@@ -5,8 +5,11 @@ import jakarta.validation.constraints.Min;
 import jakarta.validation.constraints.NotNull;
 import jakarta.validation.constraints.Size;
 import lombok.Data;
+import org.raddatz.familienarchiv.document.DatePrecision;
 import org.raddatz.familienarchiv.person.PersonType;
 
+import java.time.LocalDate;
+
 @Data
 public class PersonUpdateDTO {
     @NotNull
@@ -21,8 +24,10 @@ public class PersonUpdateDTO {
     private String alias;
     @Size(max = 5000)
     private String notes;
-    private Integer birthYear;
+    private LocalDate birthDate;
-    private Integer deathYear;
+    private DatePrecision birthDatePrecision;
+    private LocalDate deathDate;
+    private DatePrecision deathDatePrecision;
     // Mirror of the persons.generation CHECK constraint (V70). Bounds live in
     // PersonGeneration so DB, DTO, and importer all read from one place.
     @Min(PersonGeneration.MIN_GENERATION)

backend/src/main/java/org/raddatz/familienarchiv/person/relationship/RelationshipInferenceService.java

@@ -96,7 +96,9 @@ public class RelationshipInferenceService {
             if (p == null) continue;
             List<RelationToken> path = shortestPaths.get(id);
             PersonNodeDTO node = new PersonNodeDTO(
-                    p.getId(), p.getDisplayName(), p.getBirthYear(), p.getDeathYear(),
+                    p.getId(), p.getDisplayName(),
+                    p.getBirthDate() != null ? p.getBirthDate().getYear() : null,
+                    p.getDeathDate() != null ? p.getDeathDate().getYear() : null,
                     p.getGeneration(), p.isFamilyMember());
             out.add(new InferredRelationshipWithPersonDTO(node, labelFor(path), path.size()));
         }

backend/src/main/java/org/raddatz/familienarchiv/person/relationship/RelationshipService.java

@@ -15,6 +15,7 @@ import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.time.LocalDate;
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
@@ -66,7 +67,8 @@ public class RelationshipService {
         for (Person p : familyMembers) {
             familyIds.add(p.getId());
             nodes.add(new PersonNodeDTO(
-                    p.getId(), p.getDisplayName(), p.getBirthYear(), p.getDeathYear(),
+                    p.getId(), p.getDisplayName(),
+                    yearOf(p.getBirthDate()), yearOf(p.getDeathDate()),
                     p.getGeneration(), true));
         }
 
@@ -155,6 +157,12 @@ public class RelationshipService {
         return (s == null || s.isBlank()) ? null : s.trim();
     }
 
+    // Stammbaum DTOs stay year-shaped: derive the year from the LocalDate, null-safe
+    // for persons with no date entered (ADR-039, REQ-PERSON-DATE-01).
+    private static Integer yearOf(LocalDate date) {
+        return date != null ? date.getYear() : null;
+    }
+
     private static void validateYears(Integer fromYear, Integer toYear) {
         if (fromYear != null && toYear != null && toYear < fromYear) {
             throw DomainException.badRequest(
@@ -170,11 +178,11 @@ public class RelationshipService {
                 p.getId(),
                 rp.getId(),
                 p.getDisplayName(),
-                p.getBirthYear(),
+                yearOf(p.getBirthDate()),
-                p.getDeathYear(),
+                yearOf(p.getDeathDate()),
                 rp.getDisplayName(),
-                rp.getBirthYear(),
+                yearOf(rp.getBirthDate()),
-                rp.getDeathYear(),
+                yearOf(rp.getDeathDate()),
                 r.getRelationType(),
                 r.getFromYear(),
                 r.getToYear(),

backend/src/test/java/org/raddatz/familienarchiv/person/PersonControllerTest.java

@@ -4,6 +4,7 @@ import org.junit.jupiter.api.Test;
 import org.mockito.ArgumentCaptor;
 import org.raddatz.familienarchiv.exception.DomainException;
 import org.raddatz.familienarchiv.exception.ErrorCode;
+import org.raddatz.familienarchiv.document.DatePrecision;
 import org.raddatz.familienarchiv.document.Document;
 import org.raddatz.familienarchiv.person.Person;
 import org.raddatz.familienarchiv.person.PersonNameAlias;
@@ -22,6 +23,7 @@ import org.springframework.security.test.context.support.WithMockUser;
 import org.springframework.test.context.bean.override.mockito.MockitoBean;
 import org.springframework.test.web.servlet.MockMvc;
 
+import java.time.LocalDate;
 import java.util.Collections;
 import java.util.List;
 import java.util.UUID;
@@ -572,18 +574,53 @@ class PersonControllerTest {
     void createPerson_returns200_withAllSixFields() throws Exception {
         UUID id = UUID.randomUUID();
         Person saved = Person.builder().id(id).firstName("Maria").lastName("Raddatz")
-                .alias("Oma Maria").birthYear(1901).deathYear(1975).notes("Some notes").build();
+                .alias("Oma Maria")
+                .birthDate(LocalDate.of(1901, 3, 14)).birthDatePrecision(DatePrecision.DAY)
+                .deathDate(LocalDate.of(1975, 1, 1)).deathDatePrecision(DatePrecision.YEAR)
+                .notes("Some notes").build();
         when(personService.createPerson(any(org.raddatz.familienarchiv.person.PersonUpdateDTO.class))).thenReturn(saved);
 
         mockMvc.perform(post("/api/persons").with(csrf())
                         .contentType(MediaType.APPLICATION_JSON)
                         .content("{\"firstName\":\"Maria\",\"lastName\":\"Raddatz\"," +
-                                "\"alias\":\"Oma Maria\",\"birthYear\":1901,\"deathYear\":1975," +
+                                "\"alias\":\"Oma Maria\"," +
+                                "\"birthDate\":\"1901-03-14\",\"birthDatePrecision\":\"DAY\"," +
+                                "\"deathDate\":\"1975-01-01\",\"deathDatePrecision\":\"YEAR\"," +
                                 "\"notes\":\"Some notes\",\"personType\":\"PERSON\"}"))
                 .andExpect(status().isOk())
                 .andExpect(jsonPath("$.firstName").value("Maria"))
                 .andExpect(jsonPath("$.alias").value("Oma Maria"))
-                .andExpect(jsonPath("$.birthYear").value(1901));
+                .andExpect(jsonPath("$.birthDate").value("1901-03-14"))
+                .andExpect(jsonPath("$.birthDatePrecision").value("DAY"));
+    }
+
+    // ─── #773: malformed date payloads return structured 400s, not Jackson traces ──
+    // Jackson rejects unknown enum values by default. Verified 2026-06-12: the only
+    // DeserializationFeature hit in src/main is RestClientOcrClient's private ObjectMapper
+    // (OCR HTTP client) — the Spring MVC mapper has no READ_UNKNOWN_ENUM_VALUES_* override.
+
+    @Test
+    @WithMockUser(authorities = "WRITE_ALL")
+    void updatePerson_returns400WithStructuredErrorCode_whenPrecisionEnumInvalid() throws Exception {
+        UUID id = UUID.randomUUID();
+        mockMvc.perform(put("/api/persons/{id}", id).with(csrf())
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"firstName\":\"Hans\",\"lastName\":\"Müller\",\"personType\":\"PERSON\"," +
+                                "\"birthDate\":\"1901-03-14\",\"birthDatePrecision\":\"INVALID_VALUE\"}"))
+                .andExpect(status().isBadRequest())
+                .andExpect(jsonPath("$.code").value("VALIDATION_ERROR"));
+    }
+
+    @Test
+    @WithMockUser(authorities = "WRITE_ALL")
+    void updatePerson_returns400WithStructuredErrorCode_whenBirthDateNotADate() throws Exception {
+        UUID id = UUID.randomUUID();
+        mockMvc.perform(put("/api/persons/{id}", id).with(csrf())
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"firstName\":\"Hans\",\"lastName\":\"Müller\",\"personType\":\"PERSON\"," +
+                                "\"birthDate\":\"not-a-date\",\"birthDatePrecision\":\"DAY\"}"))
+                .andExpect(status().isBadRequest())
+                .andExpect(jsonPath("$.code").value("VALIDATION_ERROR"));
     }
 
     // ─── Phase 1.2: @Size constraints ─────────────────────────────────────────

backend/src/test/java/org/raddatz/familienarchiv/person/PersonImportUpsertTest.java

@@ -5,7 +5,9 @@ import org.junit.jupiter.api.extension.ExtendWith;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
+import org.raddatz.familienarchiv.document.DatePrecision;
 
+import java.time.LocalDate;
 import java.util.Optional;
 import java.util.UUID;
 
@@ -97,24 +99,120 @@ class PersonImportUpsertTest {
         assertThat(result.getNotes()).isEqualTo("Nichte von Herbert");
     }
 
+    // ─── life dates (ADR-025 extension via preferHumanDate, #773) ─────────────
+
     @Test
-    void upsertBySourceRef_fillsBlankYears_butPreservesHumanEditedYears_onReimport() {
+    void upsertBySourceRef_preservesDayPrecisionDate_onReimportWithDifferentYear() {
-        // Existing has a human-set birthYear and a blank deathYear.
+        // A human entered the exact birthday in-app; the spreadsheet only knows a year.
-        Person existing = Person.builder()
+        Person handDated = Person.builder()
-                .id(UUID.randomUUID()).sourceRef("clara-cram")
+                .id(UUID.randomUUID()).sourceRef("clara-cram").lastName("Cram")
-                .lastName("Cram").birthYear(1890).deathYear(null).build();
+                .birthDate(LocalDate.of(1890, 3, 14)).birthDatePrecision(DatePrecision.DAY).build();
-        when(personRepository.findBySourceRef("clara-cram")).thenReturn(Optional.of(existing));
+        when(personRepository.findBySourceRef("clara-cram")).thenReturn(Optional.of(handDated));
         when(personRepository.save(any())).thenAnswer(inv -> inv.getArgument(0));
 
         PersonUpsertCommand cmd = PersonUpsertCommand.builder()
                 .sourceRef("clara-cram").lastName("Cram")
-                .birthYear(1888).deathYear(1965)
+                .birthYear(1888)
                 .personType(PersonType.PERSON).provisional(false).build();
 
         Person result = personService.upsertBySourceRef(cmd);
 
-        assertThat(result.getBirthYear()).isEqualTo(1890); // human value kept
+        assertThat(result.getBirthDate()).isEqualTo(LocalDate.of(1890, 3, 14));
-        assertThat(result.getDeathYear()).isEqualTo(1965); // blank filled from canonical
+        assertThat(result.getBirthDatePrecision()).isEqualTo(DatePrecision.DAY);
+    }
+
+    @Test
+    void upsertBySourceRef_preservesMonthPrecisionDate_onReimport() {
+        Person handDated = Person.builder()
+                .id(UUID.randomUUID()).sourceRef("clara-cram").lastName("Cram")
+                .deathDate(LocalDate.of(1944, 11, 1)).deathDatePrecision(DatePrecision.MONTH).build();
+        when(personRepository.findBySourceRef("clara-cram")).thenReturn(Optional.of(handDated));
+        when(personRepository.save(any())).thenAnswer(inv -> inv.getArgument(0));
+
+        PersonUpsertCommand cmd = PersonUpsertCommand.builder()
+                .sourceRef("clara-cram").lastName("Cram")
+                .deathYear(1945)
+                .personType(PersonType.PERSON).provisional(false).build();
+
+        Person result = personService.upsertBySourceRef(cmd);
+
+        assertThat(result.getDeathDate()).isEqualTo(LocalDate.of(1944, 11, 1));
+        assertThat(result.getDeathDatePrecision()).isEqualTo(DatePrecision.MONTH);
+    }
+
+    @Test
+    void upsertBySourceRef_refreshesYearPrecisionDate_whenSpreadsheetYearChanges() {
+        // YEAR precision means "the importer's year" — a corrected spreadsheet year wins.
+        Person yearOnly = Person.builder()
+                .id(UUID.randomUUID()).sourceRef("clara-cram").lastName("Cram")
+                .birthDate(LocalDate.of(1890, 1, 1)).birthDatePrecision(DatePrecision.YEAR).build();
+        when(personRepository.findBySourceRef("clara-cram")).thenReturn(Optional.of(yearOnly));
+        when(personRepository.save(any())).thenAnswer(inv -> inv.getArgument(0));
+
+        PersonUpsertCommand cmd = PersonUpsertCommand.builder()
+                .sourceRef("clara-cram").lastName("Cram")
+                .birthYear(1888)
+                .personType(PersonType.PERSON).provisional(false).build();
+
+        Person result = personService.upsertBySourceRef(cmd);
+
+        assertThat(result.getBirthDate()).isEqualTo(LocalDate.of(1888, 1, 1));
+        assertThat(result.getBirthDatePrecision()).isEqualTo(DatePrecision.YEAR);
+    }
+
+    @Test
+    void upsertBySourceRef_fillsEmptyDateAtYearPrecision_onReimport() {
+        Person noDates = Person.builder()
+                .id(UUID.randomUUID()).sourceRef("clara-cram").lastName("Cram").build();
+        when(personRepository.findBySourceRef("clara-cram")).thenReturn(Optional.of(noDates));
+        when(personRepository.save(any())).thenAnswer(inv -> inv.getArgument(0));
+
+        PersonUpsertCommand cmd = PersonUpsertCommand.builder()
+                .sourceRef("clara-cram").lastName("Cram")
+                .deathYear(1965)
+                .personType(PersonType.PERSON).provisional(false).build();
+
+        Person result = personService.upsertBySourceRef(cmd);
+
+        assertThat(result.getDeathDate()).isEqualTo(LocalDate.of(1965, 1, 1));
+        assertThat(result.getDeathDatePrecision()).isEqualTo(DatePrecision.YEAR);
+    }
+
+    @Test
+    void upsertBySourceRef_keepsDatesEmpty_whenSpreadsheetHasNoYear() {
+        Person noDates = Person.builder()
+                .id(UUID.randomUUID()).sourceRef("clara-cram").lastName("Cram").build();
+        when(personRepository.findBySourceRef("clara-cram")).thenReturn(Optional.of(noDates));
+        when(personRepository.save(any())).thenAnswer(inv -> inv.getArgument(0));
+
+        PersonUpsertCommand cmd = PersonUpsertCommand.builder()
+                .sourceRef("clara-cram").lastName("Cram")
+                .personType(PersonType.PERSON).provisional(false).build();
+
+        Person result = personService.upsertBySourceRef(cmd);
+
+        assertThat(result.getBirthDate()).isNull();
+        assertThat(result.getBirthDatePrecision()).isEqualTo(DatePrecision.UNKNOWN);
+        assertThat(result.getDeathDate()).isNull();
+        assertThat(result.getDeathDatePrecision()).isEqualTo(DatePrecision.UNKNOWN);
+    }
+
+    @Test
+    void upsertBySourceRef_translatesYearToDate_onFirstImport() {
+        when(personRepository.findBySourceRef("clara-cram")).thenReturn(Optional.empty());
+        when(personRepository.save(any())).thenAnswer(inv -> inv.getArgument(0));
+
+        PersonUpsertCommand cmd = PersonUpsertCommand.builder()
+                .sourceRef("clara-cram").lastName("Cram")
+                .birthYear(1890).deathYear(1965)
+                .personType(PersonType.PERSON).provisional(false).build();
+
+        Person result = personService.upsertBySourceRef(cmd);
+
+        assertThat(result.getBirthDate()).isEqualTo(LocalDate.of(1890, 1, 1));
+        assertThat(result.getBirthDatePrecision()).isEqualTo(DatePrecision.YEAR);
+        assertThat(result.getDeathDate()).isEqualTo(LocalDate.of(1965, 1, 1));
+        assertThat(result.getDeathDatePrecision()).isEqualTo(DatePrecision.YEAR);
     }
 
     @Test

backend/src/test/java/org/raddatz/familienarchiv/person/PersonRepositoryTest.java

@@ -18,6 +18,9 @@ import org.raddatz.familienarchiv.document.DocumentRepository;
 
 import jakarta.persistence.EntityManager;
 import jakarta.persistence.PersistenceContext;
+import org.raddatz.familienarchiv.document.DatePrecision;
+
+import java.time.LocalDate;
 import java.util.List;
 import java.util.Optional;
 import java.util.Set;
@@ -910,4 +913,61 @@ class PersonRepositoryTest {
                 .setParameter(1, blockId).getSingleResult();
         assertThat(text).isEqualTo("Brief an @Auguste Raddatz und @Clara Cram");
     }
+
+    // ─── #773: PersonSummaryDTO year projection from birth_date/death_date ──────
+
+    @Test
+    void findAllWithDocumentCount_derivesYearsFromDates_nullSafe() {
+        personRepository.save(Person.builder()
+                .firstName("Maria").lastName("Datiert")
+                .birthDate(LocalDate.of(1901, 3, 14)).birthDatePrecision(DatePrecision.DAY)
+                .build());
+        personRepository.save(Person.builder()
+                .firstName("Nora").lastName("Undatiert")
+                .build());
+        entityManager.flush();
+
+        List<PersonSummaryDTO> all = personRepository.findAllWithDocumentCount();
+
+        PersonSummaryDTO dated = all.stream()
+                .filter(p -> "Datiert".equals(p.getLastName())).findFirst().orElseThrow();
+        assertThat(dated.getBirthYear()).isEqualTo(1901);
+        assertThat(dated.getDeathYear()).isNull();
+        PersonSummaryDTO undated = all.stream()
+                .filter(p -> "Undatiert".equals(p.getLastName())).findFirst().orElseThrow();
+        assertThat(undated.getBirthYear()).isNull();
+        assertThat(undated.getDeathYear()).isNull();
+    }
+
+    @Test
+    void searchWithDocumentCount_groupByPath_derivesYearsFromDates() {
+        personRepository.save(Person.builder()
+                .firstName("Herbert").lastName("Gruppiert")
+                .birthDate(LocalDate.of(1899, 1, 1)).birthDatePrecision(DatePrecision.YEAR)
+                .deathDate(LocalDate.of(1972, 6, 12)).deathDatePrecision(DatePrecision.DAY)
+                .build());
+        entityManager.flush();
+
+        List<PersonSummaryDTO> found = personRepository.searchWithDocumentCount("Gruppiert");
+
+        assertThat(found).hasSize(1);
+        assertThat(found.get(0).getBirthYear()).isEqualTo(1899);
+        assertThat(found.get(0).getDeathYear()).isEqualTo(1972);
+    }
+
+    @Test
+    void findByFilter_derivesYearsFromDates() {
+        personRepository.save(Person.builder()
+                .firstName("Filtriert").lastName("Person")
+                .birthDate(LocalDate.of(1920, 1, 1)).birthDatePrecision(DatePrecision.YEAR)
+                .build());
+        entityManager.flush();
+
+        List<PersonSummaryDTO> found = personRepository.findByFilter(
+                null, null, null, null, false, "Filtriert", 10, 0);
+
+        assertThat(found).hasSize(1);
+        assertThat(found.get(0).getBirthYear()).isEqualTo(1920);
+        assertThat(found.get(0).getDeathYear()).isNull();
+    }
 }

backend/src/test/java/org/raddatz/familienarchiv/person/PersonServiceTest.java

@@ -8,7 +8,9 @@ import org.mockito.junit.jupiter.MockitoExtension;
 import org.raddatz.familienarchiv.person.PersonNameAliasDTO;
 import org.raddatz.familienarchiv.person.PersonSummaryDTO;
 import org.raddatz.familienarchiv.person.PersonUpdateDTO;
+import org.raddatz.familienarchiv.document.DatePrecision;
 import org.raddatz.familienarchiv.exception.DomainException;
+import org.raddatz.familienarchiv.exception.ErrorCode;
 import org.raddatz.familienarchiv.person.Person;
 import org.raddatz.familienarchiv.person.PersonNameAlias;
 import org.raddatz.familienarchiv.person.PersonNameAliasType;
@@ -17,6 +19,7 @@ import org.raddatz.familienarchiv.person.PersonNameAliasRepository;
 import org.raddatz.familienarchiv.person.PersonRepository;
 import org.springframework.web.server.ResponseStatusException;
 
+import java.time.LocalDate;
 import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
@@ -241,27 +244,49 @@ class PersonServiceTest {
 
         PersonUpdateDTO dto = new PersonUpdateDTO();
         dto.setFirstName("Maria"); dto.setLastName("Raddatz"); dto.setAlias("Oma Maria");
-        dto.setBirthYear(1901); dto.setDeathYear(1975); dto.setNotes("Some notes");
+        dto.setBirthDate(LocalDate.of(1901, 3, 14)); dto.setBirthDatePrecision(DatePrecision.DAY);
+        dto.setDeathDate(LocalDate.of(1975, 11, 2)); dto.setDeathDatePrecision(DatePrecision.DAY);
+        dto.setNotes("Some notes");
 
         Person result = personService.createPerson(dto);
 
         assertThat(result.getFirstName()).isEqualTo("Maria");
         assertThat(result.getLastName()).isEqualTo("Raddatz");
         assertThat(result.getAlias()).isEqualTo("Oma Maria");
-        assertThat(result.getBirthYear()).isEqualTo(1901);
+        assertThat(result.getBirthDate()).isEqualTo(LocalDate.of(1901, 3, 14));
-        assertThat(result.getDeathYear()).isEqualTo(1975);
+        assertThat(result.getBirthDatePrecision()).isEqualTo(DatePrecision.DAY);
+        assertThat(result.getDeathDate()).isEqualTo(LocalDate.of(1975, 11, 2));
+        assertThat(result.getDeathDatePrecision()).isEqualTo(DatePrecision.DAY);
         assertThat(result.getNotes()).isEqualTo("Some notes");
     }
 
     @Test
-    void createPerson_dto_yearValidationFires_whenBirthYearNegative() {
+    void createPerson_dto_rejectsDateWithUnknownPrecision() {
         PersonUpdateDTO dto = new PersonUpdateDTO();
-        dto.setFirstName("Anna"); dto.setLastName("Test"); dto.setBirthYear(-1);
+        dto.setFirstName("Anna"); dto.setLastName("Test");
+        dto.setBirthDate(LocalDate.of(1901, 3, 14)); dto.setBirthDatePrecision(DatePrecision.UNKNOWN);
 
         assertThatThrownBy(() -> personService.createPerson(dto))
-                .isInstanceOf(ResponseStatusException.class)
+                .isInstanceOf(DomainException.class)
-                .extracting(e -> ((ResponseStatusException) e).getStatusCode().value())
+                .satisfies(e -> {
-                .isEqualTo(400);
+                    assertThat(((DomainException) e).getCode()).isEqualTo(ErrorCode.INVALID_DATE_PRECISION);
+                    assertThat(((DomainException) e).getStatus().value()).isEqualTo(400);
+                });
+    }
+
+    @Test
+    void createPerson_dto_treatsNullPrecisionWithNullDateAsUnknown() {
+        when(personRepository.save(any())).thenAnswer(inv -> inv.getArgument(0));
+
+        PersonUpdateDTO dto = new PersonUpdateDTO();
+        dto.setFirstName("Anna"); dto.setLastName("Test"); dto.setPersonType(PersonType.PERSON);
+
+        Person result = personService.createPerson(dto);
+
+        assertThat(result.getBirthDate()).isNull();
+        assertThat(result.getBirthDatePrecision()).isEqualTo(DatePrecision.UNKNOWN);
+        assertThat(result.getDeathDate()).isNull();
+        assertThat(result.getDeathDatePrecision()).isEqualTo(DatePrecision.UNKNOWN);
     }
 
     @Test
@@ -600,114 +625,135 @@ class PersonServiceTest {
         assertThat(result.getNotes()).isNull();
     }
 
-    // ─── updatePerson (birth/death years) ────────────────────────────────────
+    // ─── updatePerson (birth/death dates) ────────────────────────────────────
 
     @Test
-    void updatePerson_persistsBirthAndDeathYear() {
+    void updatePerson_persistsBirthAndDeathDateWithPrecision() {
         UUID id = UUID.randomUUID();
         Person person = Person.builder().id(id).firstName("Anna").lastName("Alt").build();
         when(personRepository.findById(id)).thenReturn(Optional.of(person));
         when(personRepository.save(any())).thenAnswer(inv -> inv.getArgument(0));
 
         PersonUpdateDTO dto = new PersonUpdateDTO();
-        dto.setFirstName("Anna"); dto.setLastName("Alt"); dto.setBirthYear(1890); dto.setDeathYear(1965);
+        dto.setFirstName("Anna"); dto.setLastName("Alt");
+        dto.setBirthDate(LocalDate.of(1890, 1, 1)); dto.setBirthDatePrecision(DatePrecision.YEAR);
+        dto.setDeathDate(LocalDate.of(1965, 6, 12)); dto.setDeathDatePrecision(DatePrecision.DAY);
         Person result = personService.updatePerson(id, dto);
 
-        assertThat(result.getBirthYear()).isEqualTo(1890);
+        assertThat(result.getBirthDate()).isEqualTo(LocalDate.of(1890, 1, 1));
-        assertThat(result.getDeathYear()).isEqualTo(1965);
+        assertThat(result.getBirthDatePrecision()).isEqualTo(DatePrecision.YEAR);
+        assertThat(result.getDeathDate()).isEqualTo(LocalDate.of(1965, 6, 12));
+        assertThat(result.getDeathDatePrecision()).isEqualTo(DatePrecision.DAY);
     }
 
     @Test
-    void updatePerson_throwsBadRequest_whenBirthYearAfterDeathYear() {
+    void updatePerson_throwsBirthAfterDeath_whenBirthDateAfterDeathDate() {
         UUID id = UUID.randomUUID();
 
         PersonUpdateDTO dto = new PersonUpdateDTO();
-        dto.setFirstName("Anna"); dto.setLastName("Alt"); dto.setBirthYear(1970); dto.setDeathYear(1950);
+        dto.setFirstName("Anna"); dto.setLastName("Alt");
+        dto.setBirthDate(LocalDate.of(1970, 5, 1)); dto.setBirthDatePrecision(DatePrecision.DAY);
+        dto.setDeathDate(LocalDate.of(1950, 5, 1)); dto.setDeathDatePrecision(DatePrecision.DAY);
         assertThatThrownBy(() -> personService.updatePerson(id, dto))
-                .isInstanceOf(ResponseStatusException.class)
+                .isInstanceOf(DomainException.class)
-                .extracting(e -> ((ResponseStatusException) e).getStatusCode().value())
+                .satisfies(e -> {
-                .isEqualTo(400);
+                    assertThat(((DomainException) e).getCode()).isEqualTo(ErrorCode.BIRTH_AFTER_DEATH);
+                    assertThat(((DomainException) e).getStatus().value()).isEqualTo(400);
+                });
     }
 
     @Test
-    void updatePerson_doesNotThrow_whenBirthYearNonNullButDeathYearIsNull() {
+    void updatePerson_throwsBirthAfterDeath_onMixedPrecisionLateBirthday() {
-        // Covers A && B short-circuit: birthYear != null (true) but deathYear == null (false) → no throw
+        // Known limitation (#773): DAY-precision birth late in the death's YEAR-precision year
+        // compares against the year's backfilled Jan 1st and is rejected. The error message
+        // carries the workaround hint via the BIRTH_AFTER_DEATH i18n key.
+        UUID id = UUID.randomUUID();
+
+        PersonUpdateDTO dto = new PersonUpdateDTO();
+        dto.setFirstName("Anna"); dto.setLastName("Alt");
+        dto.setBirthDate(LocalDate.of(1901, 11, 15)); dto.setBirthDatePrecision(DatePrecision.DAY);
+        dto.setDeathDate(LocalDate.of(1901, 1, 1)); dto.setDeathDatePrecision(DatePrecision.YEAR);
+        assertThatThrownBy(() -> personService.updatePerson(id, dto))
+                .isInstanceOf(DomainException.class)
+                .extracting(e -> ((DomainException) e).getCode())
+                .isEqualTo(ErrorCode.BIRTH_AFTER_DEATH);
+    }
+
+    @Test
+    void updatePerson_doesNotThrow_whenBirthDateSetButDeathDateNull() {
         UUID id = UUID.randomUUID();
         Person person = Person.builder().id(id).firstName("Anna").lastName("Alt").build();
         when(personRepository.findById(id)).thenReturn(Optional.of(person));
         when(personRepository.save(any())).thenAnswer(inv -> inv.getArgument(0));
 
         PersonUpdateDTO dto = new PersonUpdateDTO();
-        dto.setFirstName("Anna"); dto.setLastName("Alt"); dto.setBirthYear(1890); dto.setDeathYear(null);
+        dto.setFirstName("Anna"); dto.setLastName("Alt");
+        dto.setBirthDate(LocalDate.of(1890, 1, 1)); dto.setBirthDatePrecision(DatePrecision.YEAR);
         Person result = personService.updatePerson(id, dto);
 
-        assertThat(result.getBirthYear()).isEqualTo(1890);
+        assertThat(result.getBirthDate()).isEqualTo(LocalDate.of(1890, 1, 1));
-        assertThat(result.getDeathYear()).isNull();
+        assertThat(result.getDeathDate()).isNull();
+        assertThat(result.getDeathDatePrecision()).isEqualTo(DatePrecision.UNKNOWN);
     }
 
     @Test
-    void updatePerson_allowsSameYear() {
+    void updatePerson_allowsEqualBirthAndDeathDate() {
         UUID id = UUID.randomUUID();
         Person person = Person.builder().id(id).firstName("Anna").lastName("Alt").build();
         when(personRepository.findById(id)).thenReturn(Optional.of(person));
         when(personRepository.save(any())).thenAnswer(inv -> inv.getArgument(0));
 
         PersonUpdateDTO dto = new PersonUpdateDTO();
-        dto.setFirstName("Anna"); dto.setLastName("Alt"); dto.setBirthYear(1900); dto.setDeathYear(1900);
+        dto.setFirstName("Anna"); dto.setLastName("Alt");
+        dto.setBirthDate(LocalDate.of(1900, 1, 1)); dto.setBirthDatePrecision(DatePrecision.YEAR);
+        dto.setDeathDate(LocalDate.of(1900, 1, 1)); dto.setDeathDatePrecision(DatePrecision.YEAR);
         Person result = personService.updatePerson(id, dto);
 
-        assertThat(result.getBirthYear()).isEqualTo(1900);
+        assertThat(result.getBirthDate()).isEqualTo(LocalDate.of(1900, 1, 1));
-        assertThat(result.getDeathYear()).isEqualTo(1900);
+        assertThat(result.getDeathDate()).isEqualTo(LocalDate.of(1900, 1, 1));
     }
 
-    // ─── Phase 1.3: Year range bounds (> 0) ──────────────────────────────────
+    // ─── Date/precision coherence (V76 CHECK constraint mirror) ─────────────
 
     @Test
-    void updatePerson_throwsBadRequest_whenBirthYearIsZero() {
+    void updatePerson_throwsInvalidDatePrecision_whenDatePresentButPrecisionUnknown() {
         UUID id = UUID.randomUUID();
 
         PersonUpdateDTO dto = new PersonUpdateDTO();
-        dto.setFirstName("Anna"); dto.setLastName("Alt"); dto.setBirthYear(0);
+        dto.setFirstName("Anna"); dto.setLastName("Alt");
+        dto.setDeathDate(LocalDate.of(1944, 11, 2)); dto.setDeathDatePrecision(DatePrecision.UNKNOWN);
         assertThatThrownBy(() -> personService.updatePerson(id, dto))
-                .isInstanceOf(ResponseStatusException.class)
+                .isInstanceOf(DomainException.class)
-                .extracting(e -> ((ResponseStatusException) e).getStatusCode().value())
+                .satisfies(e -> {
-                .isEqualTo(400);
+                    assertThat(((DomainException) e).getCode()).isEqualTo(ErrorCode.INVALID_DATE_PRECISION);
+                    assertThat(((DomainException) e).getStatus().value()).isEqualTo(400);
+                });
     }
 
     @Test
-    void updatePerson_throwsBadRequest_whenBirthYearIsNegative() {
+    void updatePerson_throwsInvalidDatePrecision_whenDatePresentButPrecisionNull() {
         UUID id = UUID.randomUUID();
 
         PersonUpdateDTO dto = new PersonUpdateDTO();
-        dto.setFirstName("Anna"); dto.setLastName("Alt"); dto.setBirthYear(-5);
+        dto.setFirstName("Anna"); dto.setLastName("Alt");
+        dto.setBirthDate(LocalDate.of(1901, 3, 14));
         assertThatThrownBy(() -> personService.updatePerson(id, dto))
-                .isInstanceOf(ResponseStatusException.class)
+                .isInstanceOf(DomainException.class)
-                .extracting(e -> ((ResponseStatusException) e).getStatusCode().value())
+                .extracting(e -> ((DomainException) e).getCode())
-                .isEqualTo(400);
+                .isEqualTo(ErrorCode.INVALID_DATE_PRECISION);
     }
 
     @Test
-    void updatePerson_throwsBadRequest_whenDeathYearIsZero() {
+    void updatePerson_throwsInvalidDatePrecision_whenPrecisionSetWithoutDate() {
         UUID id = UUID.randomUUID();
 
         PersonUpdateDTO dto = new PersonUpdateDTO();
-        dto.setFirstName("Anna"); dto.setLastName("Alt"); dto.setDeathYear(0);
+        dto.setFirstName("Anna"); dto.setLastName("Alt");
+        dto.setBirthDatePrecision(DatePrecision.DAY);
         assertThatThrownBy(() -> personService.updatePerson(id, dto))
-                .isInstanceOf(ResponseStatusException.class)
+                .isInstanceOf(DomainException.class)
-                .extracting(e -> ((ResponseStatusException) e).getStatusCode().value())
+                .extracting(e -> ((DomainException) e).getCode())
-                .isEqualTo(400);
+                .isEqualTo(ErrorCode.INVALID_DATE_PRECISION);
-    }
-
-    @Test
-    void updatePerson_throwsBadRequest_whenDeathYearIsNegative() {
-        UUID id = UUID.randomUUID();
-
-        PersonUpdateDTO dto = new PersonUpdateDTO();
-        dto.setFirstName("Anna"); dto.setLastName("Alt"); dto.setDeathYear(-10);
-        assertThatThrownBy(() -> personService.updatePerson(id, dto))
-                .isInstanceOf(ResponseStatusException.class)
-                .extracting(e -> ((ResponseStatusException) e).getStatusCode().value())
-                .isEqualTo(400);
     }
 
     // ─── findCorrespondents ──────────────────────────────────────────────────