feat(canvas): 框选 - 新增工具栏「框选」工具，空白处拖动框选后自动回到移动与选择 (#78)

Co-authored-by: sikongyue <3155157671@qq.com>

web/src/types/canvas.ts

@@ -26,6 +26,7 @@ export enum CanvasNodeType {
 export type CanvasNodeStatus = "idle" | "success" | "loading" | "error";
 export type CanvasMediaPerformanceMode = "auto" | "quality" | "performance";
 export type CanvasWorkspaceMode = "simple" | "professional";
+export type CanvasToolMode = "move" | "box-select";
 export type StoryboardShotDuration = "auto" | "5" | "10" | "15" | "30";
 export type StoryboardShotCount = "auto" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" | "10";
 export type CanvasGenerationMode = "text" | "image" | "video" | "audio";