refactor(*): 代码质量 - 优化前后端实现并完善协议与画布验证

backend/internal/app/provider_protocol.go

@@ -11,7 +11,7 @@ import (
 	"time"
 
 	"github.com/google/uuid"
-	"infinite-canvas/backend/internal/protocol"
+	"yingce/backend/internal/protocol"
 )
 
 // runDeclarativeProtocolTask 是 JSON manifest 插件的宿主运行时。