feat: 收口文档桥接与 OnlyOffice/Sidebar 回归

- 为 documents.save/meta/content、blocks.patch 与 sidebar.dataset.list 补齐 Rust 协议映射、共享契约与桥接执行器

- 对齐 BlockNote、Mindmap、OnlyOffice 的保存/路由元信息，并补真实浏览器回归脚本与 OnlyOffice 部署基线

- 忽略 Rust 本地构建产物与 Harness 调试状态文件，避免临时产物进入仓库历史

wolai-frontend/src/lib/mindmap/mindmapRouteMeta.ts

@@ -0,0 +1,56 @@
+import { randomUUID } from "crypto";
+
+export type MindmapRouteMeta = {
+  requestId: string;
+  traceId: string;
+  workspaceId: string | null;
+  documentId: string;
+  pageId: string;
+  mindmapId: string;
+  attachmentId: string;
+  ownerUserId: string;
+  source: "convex";
+};
+
+function readHeaderValue(headerList: Headers, ...candidates: string[]): string | null {
+  for (const candidate of candidates) {
+    const value = headerList.get(candidate);
+    if (typeof value === "string" && value.trim()) {
+      return value.trim();
+    }
+  }
+  return null;
+}
+
+function makeFallbackId(prefix: string): string {
+  return `${prefix}_${randomUUID()}`;
+}
+
+export function buildMindmapRouteMeta(
+  request: Request,
+  input: {
+    workspaceId?: string | null;
+    documentId: string;
+    mindmapId: string;
+    ownerUserId: string;
+  },
+): MindmapRouteMeta {
+  const requestId =
+    readHeaderValue(request.headers, "x-request-id", "x-mnote-request-id") ??
+    makeFallbackId("req");
+  const traceId =
+    readHeaderValue(request.headers, "x-trace-id", "x-mnote-trace-id", "x-request-id") ??
+    makeFallbackId("trace");
+
+  return {
+    requestId,
+    traceId,
+    workspaceId: input.workspaceId?.trim() || null,
+    documentId: input.documentId,
+    pageId: input.documentId,
+    mindmapId: input.mindmapId,
+    attachmentId: input.mindmapId,
+    ownerUserId: input.ownerUserId,
+    source: "convex",
+  };
+}