feat: add medias

backend/pkg/db/db.go

@@ -19,7 +19,7 @@ func FromContext(ctx context.Context, db *sql.DB) qrm.DB {
 
 func TruncateAllTables(ctx context.Context, db *sql.DB, tableName ...string) error {
 	for _, name := range tableName {
-		sql := fmt.Sprintf("TRUNCATE TABLE %s CASCADE", name)
+		sql := fmt.Sprintf("TRUNCATE TABLE %s RESTART IDENTITY", name)
 		if _, err := db.ExecContext(ctx, sql); err != nil {
 			return err
 		}

backend/pkg/db/pagination.go

@@ -0,0 +1,7 @@
+package db
+
+type Pagination struct {
+	Offset   string `json:"offset"`
+	OffsetID int64  `json:"-"`
+	Action   int    `json:"action"` // action: 0 :加载更多 1:刷新
+}