feat: 完成宠物模块重构与社区功能开发

本次提交包含多项核心更新：
1.  重构宠物模块数据结构：拆分皮肤图片为独立表，优化Pet、PetEvolution实体，调整字段类型与冗余字段
2.  新增宠物皮肤图片管理表，支持多进化阶段多图片展示
3.  完善宠物DTO，新增当前形态名称、皮肤信息与图片序列返回
4.  新增社区功能模块：
    - 微信端社区Feed流、点赞/取消点赞接口
    - 后台社区消息管理接口与服务实现
5.  优化商城与背包模块，替换皮肤图片获取逻辑为从新表读取预览图
6.  重构勋章服务，新增规则校验逻辑
7.  调整命名规范，修复原有控制器命名问题

QYZH.InteractiveMagazine.Service/PetService.cs

@@ -16,11 +16,13 @@ public class PetService(
     BaseRepository<Pet> petRepository,
     BaseRepository<PetFeedingRecord> feedingRecordRepository,
     BaseRepository<PetEvolution> petEvolutionRepository,
+    BaseRepository<PetSkinImage> petSkinImageRepository,
+    BaseRepository<PetSkin> petSkinRepository,
     ILogger<PetService> logger)
     : BaseRepository<Pet>, IPetService
 {
     /// <summary>
-    /// 获取用户宠物信息
+    /// 获取用户宠物信息（含当前形态名称、皮肤图片序列）
     /// </summary>
     public async Task<PetOutput?> GetPetByUserIdAsync(long userId)
     {
@@ -28,21 +30,56 @@ public class PetService(
 
         var pet = await petRepository.Queryable()
             .Where(p => p.UserId == userId)
-            .Select(p => new PetOutput
-            {
-                Id = p.Id,
-                UserId = p.UserId,
-                Name = p.Name,
-                CurrentEvolutionId = p.CurrentEvolutionId,
-                GrowthPoints = p.GrowthPoints,
-                FeedingCount = p.FeedingCount,
-                Type = p.Type,
-                Status = p.Status,
-                CreatedAt = p.CreatedAt
-            })
             .FirstAsync();
 
-        return pet;
+        if (pet == null) return null;
+
+        // 查询当前进化阶段名称
+        var evolution = await petEvolutionRepository.Queryable()
+            .Where(e => e.Id == pet.CurrentEvolutionId)
+            .FirstAsync();
+
+        // 查询当前皮肤名称
+        string? skinName = null;
+        if (pet.CurrentSkinId > 0)
+        {
+            var skin = await petSkinRepository.Queryable()
+                .Where(s => s.Id == pet.CurrentSkinId && !s.IsDeleted)
+                .FirstAsync();
+            skinName = skin?.Name;
+        }
+
+        // 查询当前形态+当前皮肤 的图片序列
+        var skinId = pet.CurrentSkinId; // 0 = 默认皮肤
+        var images = await petSkinImageRepository.Queryable()
+            .Where(i => i.SkinId == skinId
+                     && i.EvolutionStageId == pet.CurrentEvolutionId
+                     && !i.IsDeleted)
+            .OrderBy(i => i.SortOrder)
+            .Select(i => new SkinImageOutput
+            {
+                Id = i.Id,
+                ImageUrl = i.ImageUrl,
+                SortOrder = i.SortOrder
+            })
+            .ToListAsync();
+
+        return new PetOutput
+        {
+            Id = pet.Id,
+            UserId = pet.UserId,
+            Name = pet.Name,
+            CurrentEvolutionId = pet.CurrentEvolutionId,
+            EvolutionStageName = evolution?.StageName,
+            GrowthPoints = pet.GrowthPoints,
+            FeedingCount = pet.FeedingCount,
+            CurrentSkinId = pet.CurrentSkinId,
+            CurrentSkinName = skinName,
+            CurrentImages = images,
+            Type = pet.Type,
+            Status = pet.Status,
+            CreatedAt = pet.CreatedAt
+        };
     }
 
     /// <summary>
@@ -61,13 +98,20 @@ public class PetService(
             return;
         }
 
+        // 查询初始进化形态（PreviousEvolutionId 为 null 的即为初始形态）
+        var initialEvolution = await petEvolutionRepository.Queryable()
+            .Where(e => e.PreviousEvolutionId == null && e.Status == "Active")
+            .OrderBy(e => e.StageLevel)
+            .FirstAsync();
+
         var pet = new Pet
         {
             UserId = userId,
             Name = "小精灵",
-            CurrentEvolutionId = 1,
+            CurrentEvolutionId = initialEvolution?.Id ?? 0,
             GrowthPoints = 0,
             FeedingCount = 0,
+            CurrentSkinId = 0,
             Type = "Normal",
             Status = "Inactive",
             IsDeleted = false,
@@ -84,7 +128,8 @@ public class PetService(
             throw new Exception("创建宠物失败");
         }
 
-        logger.LogInformation("用户默认宠物创建成功，UserId: {UserId}, PetId: {PetId}", userId, pet.Id);
+        logger.LogInformation("用户默认宠物创建成功，UserId: {UserId}, PetId: {PetId}, EvolutionId: {EvolutionId}",
+            userId, pet.Id, pet.CurrentEvolutionId);
     }
 
     /// <summary>
@@ -185,7 +230,7 @@ public class PetService(
                 throw new BusinessException("更新宠物成长值失败", 500);
             }
 
-            // 进化检查：查找下一阶段进化形态
+            // 进化检查：查找下一阶段进化形态（PreviousEvolutionId 类型为 long?）
             var nextEvolution = await petEvolutionRepository.Queryable()
                 .Where(e => e.PreviousEvolutionId == pet.CurrentEvolutionId
                          && e.RequiredGrowth <= growthAfter