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/test/generation-task-local.test.ts

@@ -178,7 +178,7 @@ test("Canvas task surfaces route Dreamina uncertainty through shared display sem
     expect(nodeSource).toContain("isGenerationTaskSubmissionUncertain(errorDisplayTask)");
     expect(taskCenterSource).toContain("if (currentTask && isGenerationTaskSubmissionUncertain(currentTask))");
     expect(taskCenterSource).toContain("不能自动重试；请先核对官方状态，避免重复生成");
-    expect(taskCenterSource).toContain('onRetry={() => void runAction(task.id)}');
+    expect(taskCenterSource).toContain("onRetry={() => void runAction(task.id)}");
     expect(taskCenterSource).toContain("<TaskListRow");
     expect(taskCenterSource).toContain("<TaskGridCard");
     expect(createSource).not.toContain('item.generationStage === "submission_unknown"');
@@ -192,7 +192,7 @@ test("task center deletion accepts only local Dreamina records", async () => {
     const deleteActionSource = sourceSection(source, "const deleteLocalTask =", "const refreshLocalTaskStatus =");
 
     expect(compactedSource).toMatch(/\{detailTask\.provider === "dreamina-cli" \? \( <Button .*?aria-label="删除本机记录".*?onClick=\{\(\) => deleteLocalTask\(detailTask\)\}> 删除本机记录 <\/Button> \) : null\}/);
-    expect(compactedSource).toContain("任务已由官方接受；删除后仍会在后台同步官方状态。");
+    expect(compactedSource).toContain("官方状态采用最终一致轮询；转入后台后仍会继续等待并同步官方状态。");
     expect(deleteActionSource).toContain("await deleteGenerationTask(task.id);");
 });