feat:完善redis封装

backend/internal/middleware/redis/cache.go

@@ -3,6 +3,8 @@ package redis
 import (
 	"context"
 	"time"
+
+	"github.com/redis/go-redis/v9"
 )
 
 func (c *Client) GetBytes(ctx context.Context, key string) ([]byte, error) {
@@ -16,3 +18,7 @@ func (c *Client) SetBytes(ctx context.Context, key string, value []byte, ttl tim
 func (c *Client) Del(ctx context.Context, key string) error {
 	return c.rdb.Del(ctx, key).Err()
 }
+
+func (c *Client) MGet(cacheCtx context.Context, cacheKeys ...string) *redis.SliceCmd {
+	return c.rdb.MGet(cacheCtx, cacheKeys...)
+}

backend/internal/middleware/redis/zset.go

@@ -2,6 +2,7 @@ package redis
 
 import (
 	"context"
+	"errors"
 	"time"
 
 	redis "github.com/redis/go-redis/v9"
@@ -14,6 +15,27 @@ func (c *Client) ZincrBy(ctx context.Context, key string, member string, score f
 	return c.rdb.ZIncrBy(ctx, key, score, member).Err()
 }
 
+func (c *Client) ZAdd(ctx context.Context, key string, members ...redis.Z) error {
+	if c == nil || c.rdb == nil {
+		return nil
+	}
+	return c.rdb.ZAdd(ctx, key, members...).Err()
+}
+
+func (c *Client) ZRemRangeByRank(ctx context.Context, key string, start int64, stop int64) error {
+	if c == nil || c.rdb == nil {
+		return nil
+	}
+	return c.rdb.ZRemRangeByRank(ctx, key, start, stop).Err()
+}
+
+func (c *Client) ZRangeWithScores(ctx context.Context, key string, start int64, stop int64) ([]redis.Z, error) {
+	if c == nil || c.rdb == nil {
+		return nil, errors.New("redis client not initialized")
+	}
+	return c.rdb.ZRangeWithScores(ctx, key, start, stop).Result()
+}
+
 func (c *Client) Expire(ctx context.Context, key string, ttl time.Duration) error {
 	if c == nil || c.rdb == nil {
 		return nil