feat(canvas): 添加视频节点支持功能

- 在后端添加 AI 视频相关接口处理函数
- 扩展前端画布组件支持视频节点类型
- 实现视频上传、生成和播放功能
- 更新画布数据结构文档以包含视频节点
- 添加视频节点的操作工具栏和配置面板
- 集成视频存储和检索服务
- 优化视频节点的渲染和交互体验

web/src/app/(user)/canvas/components/canvas-toolbar.tsx

@@ -1,7 +1,7 @@
 import type { CSSProperties, MouseEvent as ReactMouseEvent, ReactNode, RefObject } from "react";
 import { useRef, useState } from "react";
 import { Button, Segmented } from "antd";
-import { CircleDot, Eraser, FolderOpen, Grid2x2, Hand, Image as ImageIcon, Library, Moon, Palette, Redo2, Settings2, Square, Sun, Trash2, Type, Undo2, Upload } from "lucide-react";
+import { CircleDot, Eraser, FolderOpen, Grid2x2, Hand, Image as ImageIcon, Library, Moon, Palette, Redo2, Settings2, Square, Sun, Trash2, Type, Undo2, Upload, Video } from "lucide-react";
 
 import { canvasThemes, type CanvasBackgroundMode, type CanvasColorTheme, type CanvasTheme } from "@/lib/canvas-theme";
 import { useThemeStore } from "@/stores/use-theme-store";
@@ -13,6 +13,7 @@ export function CanvasToolbar({
     canRedo,
     backgroundMode,
     onAddImage,
+    onAddVideo,
     onAddText,
     onAddConfig,
     onUndo,
@@ -30,6 +31,7 @@ export function CanvasToolbar({
     canRedo: boolean;
     backgroundMode: CanvasBackgroundMode;
     onAddImage: () => void;
+    onAddVideo: () => void;
     onAddText: () => void;
     onAddConfig: () => void;
     onUndo: () => void;
@@ -75,6 +77,9 @@ export function CanvasToolbar({
                 <ToolbarButton id="tool-image" label="图片" hovered={hovered} hoverStyle={hoverStyle} wrapRef={wrapRef} onTipX={setTipX} onHover={setHovered} onClick={onAddImage}>
                     <ImageIcon className="size-4.5" />
                 </ToolbarButton>
+                <ToolbarButton id="tool-video" label="视频" hovered={hovered} hoverStyle={hoverStyle} wrapRef={wrapRef} onTipX={setTipX} onHover={setHovered} onClick={onAddVideo}>
+                    <Video className="size-4.5" />
+                </ToolbarButton>
                 <ToolbarButton id="tool-config" label="生成配置" hovered={hovered} hoverStyle={hoverStyle} wrapRef={wrapRef} onTipX={setTipX} onHover={setHovered} onClick={onAddConfig}>
                     <Settings2 className="size-4.5" />
                 </ToolbarButton>
@@ -262,6 +267,7 @@ function toolLabel(id: string) {
     if (id === "tool-redo") return "重做";
     if (id === "tool-text") return "文本";
     if (id === "tool-image") return "图片";
+    if (id === "tool-video") return "视频";
     if (id === "tool-config") return "生成配置";
     if (id === "tool-upload") return "上传图片";
     if (id === "tool-library") return "素材库";