test(search): assert matchData key and snippet in controller search response

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

backend/src/test/java/org/raddatz/familienarchiv/controller/DocumentControllerTest.java

@@ -25,6 +25,7 @@ import org.springframework.test.web.servlet.MockMvc;
 import java.time.LocalDateTime;
 import java.util.Collections;
 import java.util.List;
+import java.util.Map;
 import java.util.Optional;
 import java.util.UUID;
 
@@ -113,6 +114,28 @@ class DocumentControllerTest {
                 .andExpect(jsonPath("$.documents").isArray());
     }
 
+    @Test
+    @WithMockUser
+    void search_responseBodyContainsMatchDataKey() throws Exception {
+        UUID docId = UUID.randomUUID();
+        Document doc = Document.builder()
+                .id(docId)
+                .title("Brief an Anna")
+                .originalFilename("brief.pdf")
+                .status(DocumentStatus.UPLOADED)
+                .build();
+        var matchData = new org.raddatz.familienarchiv.dto.SearchMatchData(
+                "Er schrieb einen langen Brief", List.of(), false, List.of(), List.of());
+        when(documentService.searchDocuments(any(), any(), any(), any(), any(), any(), any(), any(), any(), any()))
+                .thenReturn(DocumentSearchResult.withMatchData(List.of(doc), Map.of(docId, matchData)));
+
+        mockMvc.perform(get("/api/documents/search").param("q", "Brief"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.matchData").isMap())
+                .andExpect(jsonPath("$.matchData." + docId + ".transcriptionSnippet")
+                        .value("Er schrieb einen langen Brief"));
+    }
+
     // ─── POST /api/documents ─────────────────────────────────────────────────
 
     @Test