fix: redka 启动前自动创建 data/redka 目录

backend/pkg/redis/redka.go

@@ -6,6 +6,8 @@ package redis
 import (
 	"context"
 	"fmt"
+	"os"
+	"path/filepath"
 	"time"
 
 	"github.com/nalgeon/redka"
@@ -23,8 +25,12 @@ func newRedka(cfg Config) (Cache, error) {
 		dataDir = "data/redka"
 	}
 
-	// Redka v0.2.x: Open(path, opts) // Logan.Li
-	db, err := redka.Open(dataDir+"/redka.db", nil)
+	// 确保数据目录存在（redka 不会自动创建父目录）// Logan.Li
+	if err := os.MkdirAll(dataDir, 0o755); err != nil {
+		return nil, fmt.Errorf("redka: 创建数据目录失败: %w", err)
+	}
+	dbPath := filepath.Join(dataDir, "redka.db")
+	db, err := redka.Open(dbPath, nil)
 	if err != nil {
 		return nil, err
 	}