feat: prepare sellable source delivery edition

backend/src/test/java/com/sshmanager/service/SessionTreeLayoutServiceTest.java

@@ -41,6 +41,7 @@ class SessionTreeLayoutServiceTest {
         SessionTreeLayoutDto result = sessionTreeLayoutService.getLayout(1L);
 
         assertTrue(result.getNodes().isEmpty());
+        assertEquals("manual", result.getSortMode());
     }
 
     @Test
@@ -52,6 +53,7 @@ class SessionTreeLayoutServiceTest {
         SessionTreeLayoutDto parsed = new SessionTreeLayoutDto(Arrays.asList(
             new SessionTreeNodeDto("n1", "folder", "我的连接", null, 0, null, true, 1L, 1L)
         ));
+        parsed.setSortMode(null);
 
         when(sessionTreeLayoutRepository.findByUserId(1L)).thenReturn(Optional.of(saved));
         when(objectMapper.readValue(saved.getLayoutJson(), SessionTreeLayoutDto.class)).thenReturn(parsed);
@@ -60,12 +62,14 @@ class SessionTreeLayoutServiceTest {
 
         assertEquals(1, result.getNodes().size());
         assertEquals("n1", result.getNodes().get(0).getId());
+        assertEquals("manual", result.getSortMode());
     }
 
     @Test
     void saveLayoutNormalizesNullNodes() throws Exception {
         SessionTreeLayoutDto request = new SessionTreeLayoutDto();
         request.setNodes(null);
+        request.setSortMode("unknown");
 
         when(sessionTreeLayoutRepository.findByUserId(1L)).thenReturn(Optional.empty());
         when(objectMapper.writeValueAsString(any(SessionTreeLayoutDto.class))).thenReturn("{\"nodes\":[]}");
@@ -73,6 +77,7 @@ class SessionTreeLayoutServiceTest {
         SessionTreeLayoutDto result = sessionTreeLayoutService.saveLayout(1L, request);
 
         assertTrue(result.getNodes().isEmpty());
+        assertEquals("manual", result.getSortMode());
         ArgumentCaptor<SessionTreeLayout> captor = ArgumentCaptor.forClass(SessionTreeLayout.class);
         verify(sessionTreeLayoutRepository).save(captor.capture());
         assertEquals(1L, captor.getValue().getUserId().longValue());
@@ -87,5 +92,6 @@ class SessionTreeLayoutServiceTest {
         SessionTreeLayoutDto result = sessionTreeLayoutService.saveLayout(1L, null);
 
         assertEquals(Collections.emptyList(), result.getNodes());
+        assertEquals("manual", result.getSortMode());
     }
 }