fix(server): handle PostgreSQL JSON values in character list

vocata-server/src/main/java/com/vocata/character/controller/CharacterOpenController.java

@@ -13,6 +13,7 @@
 import com.vocata.common.result.ApiResponse;
 import com.vocata.common.result.PageResult;
 import com.vocata.user.service.UserFavoriteService;
+import org.postgresql.util.PGobject;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
@@ -197,13 +198,13 @@ private CharacterResponse convertMapToResponse(Map<String, Object> characterMap)
 
         // 复制角色基本信息，处理null值
         response.setId(characterMap.get("id") != null ? Long.valueOf(characterMap.get("id").toString()) : null);
-        response.setCharacterCode((String) characterMap.get("character_code"));
-        response.setName((String) characterMap.get("name"));
-        response.setDescription((String) characterMap.get("description"));
-        response.setGreeting((String) characterMap.get("greeting"));
-        response.setAvatarUrl((String) characterMap.get("avatar_url"));
-        response.setTags((String) characterMap.get("tags"));
-        response.setLanguage((String) characterMap.get("language"));
+        response.setCharacterCode(toStringValue(characterMap.get("character_code")));
+        response.setName(toStringValue(characterMap.get("name")));
+        response.setDescription(toStringValue(characterMap.get("description")));
+        response.setGreeting(toStringValue(characterMap.get("greeting")));
+        response.setAvatarUrl(toStringValue(characterMap.get("avatar_url")));
+        response.setTags(toStringValue(characterMap.get("tags")));
+        response.setLanguage(toStringValue(characterMap.get("language")));
 
         Integer status = (Integer) characterMap.get("status");
         response.setStatus(status);
@@ -239,11 +240,21 @@ private CharacterResponse convertMapToResponse(Map<String, Object> characterMap)
         }
 
         // 设置创建者名称
-        response.setCreatorName((String) characterMap.get("creator_name"));
+        response.setCreatorName(toStringValue(characterMap.get("creator_name")));
 
         return response;
     }
 
+    private String toStringValue(Object value) {
+        if (value == null) {
+            return null;
+        }
+        if (value instanceof PGobject pgObject) {
+            return pgObject.getValue();
+        }
+        return value.toString();
+    }
+
     /**
      * 将Character实体转换为CharacterDetailResponse
      */
@@ -255,4 +266,4 @@ private CharacterDetailResponse convertToDetailResponse(Character character) {
         response.setUpdatedAt(character.getUpdateDate());
         return response;
     }
-}
+}

vocata-server/src/test/java/com/vocata/character/controller/CharacterOpenControllerTest.java

@@ -0,0 +1,73 @@
+package com.vocata.character.controller;
+
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.vocata.character.dto.request.CharacterSearchRequest;
+import com.vocata.character.dto.response.CharacterResponse;
+import com.vocata.character.service.CharacterService;
+import com.vocata.common.result.ApiResponse;
+import com.vocata.common.result.PageResult;
+import org.junit.jupiter.api.Test;
+import org.postgresql.util.PGobject;
+import org.springframework.test.util.ReflectionTestUtils;
+
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.ArgumentMatchers.isNull;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+class CharacterOpenControllerTest {
+
+    @Test
+    void publicCharacterListConvertsPostgresJsonObjectsToStrings() throws Exception {
+        CharacterService characterService = mock(CharacterService.class);
+        CharacterOpenController controller = new CharacterOpenController();
+        ReflectionTestUtils.setField(controller, "characterService", characterService);
+
+        PGobject tags = new PGobject();
+        tags.setType("jsonb");
+        tags.setValue("[\"动漫\",\"治愈\"]");
+
+        Page<Map<String, Object>> page = new Page<>(1, 2, 1);
+        page.setRecords(List.of(Map.ofEntries(
+                Map.entry("id", 1L),
+                Map.entry("character_code", "char_001"),
+                Map.entry("name", "测试角色"),
+                Map.entry("description", "简介"),
+                Map.entry("greeting", "你好"),
+                Map.entry("avatar_url", "/avatar.png"),
+                Map.entry("tags", tags),
+                Map.entry("language", "zh-CN"),
+                Map.entry("status", 1),
+                Map.entry("is_official", 1),
+                Map.entry("is_featured", 0),
+                Map.entry("is_trending", 0),
+                Map.entry("trending_score", 10),
+                Map.entry("chat_count", 42L),
+                Map.entry("user_count", 3),
+                Map.entry("is_private", false),
+                Map.entry("create_id", 9L),
+                Map.entry("created_at", LocalDateTime.of(2026, 5, 7, 8, 0)),
+                Map.entry("updated_at", LocalDateTime.of(2026, 5, 7, 9, 0)),
+                Map.entry("creator_name", "创建者")
+        )));
+
+        when(characterService.getPublicCharactersWithCreator(
+                any(), eq(1), isNull(), isNull(), eq("chat_count"), eq("desc")))
+                .thenReturn(page);
+
+        CharacterSearchRequest request = new CharacterSearchRequest();
+        request.setPageNum(1);
+        request.setPageSize(2);
+
+        ApiResponse<PageResult<CharacterResponse>> response = controller.getPublicCharacters(request);
+
+        assertEquals(200, response.getCode());
+        assertEquals("[\"动漫\",\"治愈\"]", response.getData().getList().get(0).getTags());
+    }
+}