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/app/api/documents/content/route.ts

@@ -44,6 +44,14 @@ export async function GET(request: Request) {
 
       return NextResponse.json({
         content: result.content ?? null,
+        revision:
+          typeof result.revision === "number" && Number.isInteger(result.revision)
+            ? result.revision
+            : 0,
+        conflictDetectionKey:
+          typeof result.conflict_detection_key === "string" && result.conflict_detection_key.trim()
+            ? result.conflict_detection_key
+            : `${documentId}:0`,
         meta: {
           requestId: bridgeContext.requestId,
           traceId: bridgeContext.traceId,

wolai-frontend/src/app/api/documents/save/route.ts

@@ -1,58 +1,54 @@
 import { NextResponse } from "next/server";
 import { isConvexEnabled } from "@/lib/convex/enabled";
-import { getAuthedConvexClient } from "@/lib/convex/route";
-import { api } from "@/lib/convex/api";
 import {
   assertDocumentId,
   buildDocumentBridgeContext,
   buildDocumentCommandEnvelope,
   documentBridgeErrorResponse,
 } from "@/lib/documents/bridge";
-import { recordBridgeCommandArtifacts } from "@/lib/documents/bridge-log";
-
-interface SavePayload {
-  documentId: string;
-  workspaceId?: string | null;
-  content: unknown;
-}
+import { executeSaveBridgeCommand } from "@/lib/documents/save-command-adapter";
+import {
+  buildDocumentSavePayload,
+  type DocumentSavePayload,
+} from "@/lib/documents/save-contract";
 
 export async function POST(request: Request) {
   if (isConvexEnabled()) {
     try {
-      const { documentId, workspaceId, content }: SavePayload = await request.json();
-      const normalizedDocumentId = assertDocumentId(documentId);
-      const normalizedWorkspaceId = workspaceId?.trim() || null;
+      const body = await request.json() as Partial<DocumentSavePayload> & { content: unknown };
+      const normalizedDocumentId = assertDocumentId(body.documentId);
+      const payload = buildDocumentSavePayload({
+        documentId: normalizedDocumentId,
+        workspaceId: body.workspaceId,
+        revision: body.revision,
+        content: body.content as DocumentSavePayload["content"],
+        conflictDetectionKey: body.conflictDetectionKey,
+      });
+      const normalizedWorkspaceId = payload.workspaceId;
       const bridgeContext = await buildDocumentBridgeContext({ request, workspaceId: normalizedWorkspaceId });
       const envelope = buildDocumentCommandEnvelope({
         name: "documents.save",
-        payload: {
-          documentId: normalizedDocumentId,
-          workspaceId: normalizedWorkspaceId,
-          content,
-        },
+        payload: payload satisfies DocumentSavePayload,
         context: bridgeContext,
         target: {
           workspaceId: normalizedWorkspaceId,
           pageId: normalizedDocumentId,
         },
       });
-
-      const { client } = await getAuthedConvexClient();
-      await client.mutation(api.documents.updateContent, {
-        id: normalizedDocumentId,
-        content: envelope.payload.content,
-      });
-      await recordBridgeCommandArtifacts({
+      const result = await executeSaveBridgeCommand({
         context: bridgeContext,
         envelope,
       });
+
       return NextResponse.json({
         ok: true,
+        revision: result.revision,
+        conflictDetectionKey: result.conflictDetectionKey,
         meta: {
-          requestId: bridgeContext.requestId,
-          traceId: bridgeContext.traceId,
-          commandId: envelope.commandId,
-          commandName: envelope.name,
+          requestId: result.requestId,
+          traceId: result.traceId,
+          commandId: result.commandId,
+          commandName: result.commandName,
         },
       });
     } catch (error) {