Add 'server/' from commit 'e64421295fff83acbb6d6ab3d3b27f3ef8368f00'

git-subtree-dir: server
git-subtree-mainline: c4e617ada7
git-subtree-split: e64421295f

server/styleagent/agent/imagegen_cache.go

@@ -0,0 +1,21 @@
+package agent
+
+import "time"
+
+// 效果图 URL 缓存（key: 方案内容 hash:角度，24h TTL，复用泛型 TTL 缓存）
+var effectCache = NewTTLCache(24 * time.Hour)
+
+// CacheGet 读取缓存 URL
+func CacheGet(key string) (string, bool) {
+	v, ok := effectCache.Get(key)
+	if !ok {
+		return "", false
+	}
+	s, _ := v.(string)
+	return s, s != ""
+}
+
+// CacheSet 写入缓存 URL
+func CacheSet(key, url string) {
+	effectCache.Set(key, url)
+}