[CHA-2354] Add ParsedPredefinedFilterResponse to ChannelListResponse

Add class and response field for the new `predefined_filter` property
returned in QueryChannels responses when a predefined filter is used.

- Added ParsedPredefinedFilterResponse static class
- Updated ChannelListResponse to include predefinedFilter field
- Added unit tests for JSON deserialization

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: totalimmersion

src/main/java/io/getstream/chat/java/models/Channel.java

@@ -1394,13 +1394,33 @@ public static class ChannelDeleteManyResponse extends StreamResponseObject {
     private String taskId;
   }
 
+  @Data
+  @NoArgsConstructor
+  public static class ParsedPredefinedFilterResponse {
+    @Nullable
+    @JsonProperty("name")
+    private String name;
+
+    @Nullable
+    @JsonProperty("filter")
+    private Map<String, Object> filter;
+
+    @Nullable
+    @JsonProperty("sort")
+    private List<Sort> sort;
+  }
+
   @Data
   @NoArgsConstructor
   @EqualsAndHashCode(callSuper = true)
   public static class ChannelListResponse extends StreamResponseObject {
     @Nullable
     @JsonProperty("channels")
     private List<ChannelGetResponse> channels;
+
+    @Nullable
+    @JsonProperty("predefined_filter")
+    private ParsedPredefinedFilterResponse predefinedFilter;
   }
 
   @Data

src/test/java/io/getstream/chat/java/ParsedPredefinedFilterResponseTest.java

@@ -0,0 +1,75 @@
+package io.getstream.chat.java;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import io.getstream.chat.java.models.Channel.ChannelListResponse;
+import io.getstream.chat.java.models.Channel.ParsedPredefinedFilterResponse;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+public class ParsedPredefinedFilterResponseTest {
+
+  private static final ObjectMapper objectMapper = new ObjectMapper();
+
+  @DisplayName("Can deserialize ParsedPredefinedFilterResponse from JSON")
+  @Test
+  void whenDeserializingPredefinedFilterResponse_thenCorrectlyParsed() throws Exception {
+    String json = """
+        {
+          "channels": [],
+          "predefined_filter": {
+            "name": "user_messaging",
+            "filter": {"type": "messaging", "members": {"$in": ["user123"]}},
+            "sort": [{"field": "last_message_at", "direction": -1}]
+          },
+          "duration": "0.01s"
+        }
+        """;
+
+    ChannelListResponse response = objectMapper.readValue(json, ChannelListResponse.class);
+
+    Assertions.assertNotNull(response.getPredefinedFilter());
+    Assertions.assertEquals("user_messaging", response.getPredefinedFilter().getName());
+    Assertions.assertNotNull(response.getPredefinedFilter().getFilter());
+    Assertions.assertEquals("messaging", response.getPredefinedFilter().getFilter().get("type"));
+    Assertions.assertNotNull(response.getPredefinedFilter().getSort());
+    Assertions.assertEquals(1, response.getPredefinedFilter().getSort().size());
+    Assertions.assertEquals("last_message_at", response.getPredefinedFilter().getSort().get(0).getField());
+  }
+
+  @DisplayName("Can deserialize response without predefined_filter")
+  @Test
+  void whenDeserializingResponseWithoutPredefinedFilter_thenNullField() throws Exception {
+    String json = """
+        {
+          "channels": [],
+          "duration": "0.01s"
+        }
+        """;
+
+    ChannelListResponse response = objectMapper.readValue(json, ChannelListResponse.class);
+
+    Assertions.assertNull(response.getPredefinedFilter());
+  }
+
+  @DisplayName("Can deserialize predefined_filter without sort")
+  @Test
+  void whenDeserializingPredefinedFilterWithoutSort_thenSortIsNull() throws Exception {
+    String json = """
+        {
+          "channels": [],
+          "predefined_filter": {
+            "name": "simple_filter",
+            "filter": {"type": "messaging"}
+          },
+          "duration": "0.01s"
+        }
+        """;
+
+    ChannelListResponse response = objectMapper.readValue(json, ChannelListResponse.class);
+
+    Assertions.assertNotNull(response.getPredefinedFilter());
+    Assertions.assertEquals("simple_filter", response.getPredefinedFilter().getName());
+    Assertions.assertNull(response.getPredefinedFilter().getSort());
+  }
+}