fix(plugin): use DataDir from flags for plugin manager initialization

internal/bootstrap/plugin.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"fmt"
 
+	"github.com/OpenListTeam/OpenList/v4/cmd/flags"
 	"github.com/OpenListTeam/OpenList/v4/internal/plugin"
 )
 
@@ -12,7 +13,7 @@ import (
 func InitPlugins() {
 	// 2. 创建并初始化 Manager
 	// "data" 目录应从配置中获取
-	manager, err := plugin.NewManager(context.Background(), "data")
+	manager, err := plugin.NewManager(context.Background(), flags.DataDir)
 	if err != nil {
 		// 在启动时，如果插件系统失败，应该 panic
 		panic(fmt.Sprintf("Failed to initialize plugin manager: %v", err))