init: web_hgcg_server 初始化提交

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

web/service/srv_playlet/cache.go

@@ -0,0 +1,8 @@
+package srv_playlet
+
+import "videoweb/pub/common/playletcache"
+
+// clearAppPlayletHomeCache 清除app首页短剧缓存
+func clearAppPlayletHomeCache() {
+	playletcache.ClearHomeCache()
+}