Fix/补全filepath包导入 (#72)

* fix(canvas): 视频生成 - 本地素材自动迁移到 OSS 避免手动重新上传

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

* fix(canvas): 生成任务面板 - 默认收起避免遮挡画布空间

将任务面板默认状态从展开改为收起，减少任务生成期间对画布的视觉干扰。

Why: 面板默认展开时占用大量画布空间，影响创作体验；收起状态只显示任务数量和概要，用户可按需展开查看细节。

* fix(canvas): 素材迁移 - 补全 filepath 包导入修复编译错误

provider.go 中自动迁移逻辑使用了 filepath.Base() 但缺少 path/filepath 导入。

Why: 素材 OSS 迁移代码在第 239 行调用了 filepath.Base()，Go 编译器报 undefined: filepath。

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Co-authored-by: sikongyue <3155157671@qq.com>
Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

web/src/components/canvas/canvas-active-task-panel.tsx

@@ -13,7 +13,7 @@ export function CanvasActiveTaskPanel({ tasks }: { tasks: GenerationTask[] }) {
     const theme = canvasThemes[useThemeStore((state) => state.theme)];
     const reducedMotion = useReducedMotion();
     const [now, setNow] = useState(() => Date.now());
-    const [open, setOpen] = useState(true);
+    const [open, setOpen] = useState(false);
     const [expandedTaskId, setExpandedTaskId] = useState<string | null>(null);
 
     useEffect(() => {