feat: 完善创作工作台与用户诊断支持 (#295)

* feat(canvas): 参考素材 - 增加移除按钮并删除对应连线

* feat(canvas): 完善节点面板交互与拖拽反馈

* fix(canvas): 画布交互与小地图 - 统一浮层层级并完善节点识别

* feat(prompt-optimizer): 增加 AI 提示词优化器及宿主接入

* feat(canvas): 画布 - 增加自动整理节点按钮并补充文档

* chore(web): 前端 - 修正提示词优化器格式

* chore(backend): 后端 - 修正 Go 格式检查

* feat(workspace): 完善诊断导出与本地排障支持

* chore(web): 格式化诊断导出文件

* fix(web-test): 兼容 Bun 测试运行时

* fix(web-test): 对齐模型目录协议断言

web/src/pages/tasks/index.tsx

@@ -1,7 +1,7 @@
 import { App, Button, Drawer, Form, Input, Modal, Select, Switch, Tooltip, Typography } from "antd";
-import { LayoutGrid, List, Plus, RefreshCw, Search, Trash2 } from "lucide-react";
+import { Bug, LayoutGrid, List, Plus, RefreshCw, Search, Trash2 } from "lucide-react";
 import { useCallback, useEffect, useMemo, useRef, useState } from "react";
-import { useSearchParams } from "react-router";
+import { useNavigate, useSearchParams } from "react-router";
 
 import { MediaPreview } from "@/components/media-preview";
 import { ListToolbar, PageHeader, PaginationBar, WorkspacePage } from "@/components/layout/workspace-page";
@@ -53,6 +53,7 @@ function taskStatusFilter(value: string | null): TaskStatusFilter {
 
 export default function TasksPage() {
     const { message } = App.useApp();
+    const navigate = useNavigate();
     const [searchParams, setSearchParams] = useSearchParams();
     const effectiveConfig = useEffectiveConfig();
     const isAiConfigReady = useConfigStore((state) => state.isAiConfigReady);
@@ -537,6 +538,7 @@ export default function TasksPage() {
                                 </Button>
                             ) : null}
                             {canQueryProviderTask(detailTask) ? <Button icon={<RefreshCw className="size-4" />} loading={actingId === detailTask.id} onClick={() => void queryProviderTask(detailTask)}>手动查询任务</Button> : null}
+                            {isTaskFailed(detailTask) ? <Button icon={<Bug className="size-4" />} onClick={() => navigate(`/settings?section=diagnostics&taskId=${encodeURIComponent(detailTask.id)}${detailTask.projectId ? `&projectId=${encodeURIComponent(detailTask.projectId)}` : ""}`)}>导出诊断包</Button> : null}
                         </div>
                         {detailTask.error ? <pre className="task-detail-error max-h-28 overflow-auto whitespace-pre-wrap px-3 py-2 text-xs">{generationErrorMessage(detailTask.error)}</pre> : null}
                         <TaskResultMedia value={detailTask.resultJson} taskType={detailTask.type} />