feat: 从黄果 NET hgdjnet-server 9bfbafe 导入 HKDJ 官网后端

来源：hgdjnet-server 9bfbafe10d417deea959bd53117bc88a10e60a83
项目身份 HKDJ / JHA-216，独立官网仓库，Jenkins 守卫键 hkdjnet
测试目录 /server/hkdj_net，App/Web API 30331/30332

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

pub/common/playletcache/cache.go

@@ -0,0 +1,20 @@
+package playletcache
+
+import (
+	"hkdj-web-server/pub/common/enum/redisconst"
+	"hkdj-web-server/pub/common/log"
+	"hkdj-web-server/pub/redis"
+)
+
+// ClearHomeCache 清除app首页短剧缓存
+func ClearHomeCache() {
+	if redis.Client() == nil {
+		return
+	}
+	if err := redis.Del(redisconst.AppPlayletHomeCacheKey()); err != nil {
+		log.Warn("清除app首页短剧缓存失败", log.E(err))
+	}
+	if err := redis.Client().Incr(redisconst.AppPlayletHomeCacheVersionKey()).Err(); err != nil {
+		log.Warn("更新app首页短剧缓存版本失败", log.E(err))
+	}
+}