fix(#240): update test fixtures broken by rebase changes

Two backend tests passed a 6-element enrichment row but the rebase
added summary_snippet as column 7 — added null at index 6 to both
fixtures.

Two frontend page.server tests mocked only 4 dashboard API calls but
the page now makes 8 (3 Mission Control queues + weekly-stats added
on this branch) — added the 4 missing mock responses.

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

backend/src/test/java/org/raddatz/familienarchiv/service/DocumentServiceTest.java

@@ -1348,7 +1348,7 @@ class DocumentServiceTest {
         UUID docId = UUID.randomUUID();
         Document doc = Document.builder().id(docId).title("Brief an Anna").build();
         // chr(1)=\u0001 marks start, chr(2)=\u0002 marks end of highlighted term
-        List<Object[]> rows = Collections.singletonList(new Object[]{docId, "\u0001Brief\u0002 an Anna", null, false, null, null});
+        List<Object[]> rows = Collections.singletonList(new Object[]{docId, "\u0001Brief\u0002 an Anna", null, false, null, null, null});
 
         when(documentRepository.findRankedIdsByFts("Brief")).thenReturn(List.of(docId));
         when(documentRepository.findAll(any(org.springframework.data.jpa.domain.Specification.class)))
@@ -1381,7 +1381,7 @@ class DocumentServiceTest {
         Document doc = Document.builder().id(docId).title("Dok").build();
         // Simulate ts_headline output with sentinel markers around the matched word
         String snippetHeadline = "Hier ist der \u0001Brief\u0002 aus Berlin";
-        List<Object[]> rows = Collections.singletonList(new Object[]{docId, "Dok", snippetHeadline, false, null, null});
+        List<Object[]> rows = Collections.singletonList(new Object[]{docId, "Dok", snippetHeadline, false, null, null, null});
 
         when(documentRepository.findRankedIdsByFts("Brief")).thenReturn(List.of(docId));
         when(documentRepository.findAll(any(org.springframework.data.jpa.domain.Specification.class)))