server: Go 服务器（REST+WSS 网关+JWT+Argon2+配对+素材直链+任务状态机）；修复并发下线 send-on-closed-channel、下发查询 SQL 优先级、配对码原子占用、上传体积上限、JWT 默认密钥告警

server/internal/cache/refresh.go

@@ -0,0 +1,32 @@
+package cache
+
+import (
+	"context"
+	"fmt"
+	"time"
+)
+
+// SaveRefresh 登记刷新令牌（jti 白名单，用于轮换与登出吊销）
+func (r *Redis) SaveRefresh(uid uint64, jti string, ttl time.Duration) error {
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	defer cancel()
+	key := fmt.Sprintf("refresh:%d:%s", uid, jti)
+	return r.client.Set(ctx, key, "1", ttl).Err()
+}
+
+// ExistsRefresh 校验刷新令牌是否有效
+func (r *Redis) ExistsRefresh(uid uint64, jti string) (bool, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	defer cancel()
+	key := fmt.Sprintf("refresh:%d:%s", uid, jti)
+	n, err := r.client.Exists(ctx, key).Result()
+	return n == 1, err
+}
+
+// DeleteRefresh 吊销刷新令牌
+func (r *Redis) DeleteRefresh(uid uint64, jti string) error {
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	defer cancel()
+	key := fmt.Sprintf("refresh:%d:%s", uid, jti)
+	return r.client.Del(ctx, key).Err()
+}