refactor: consolidate requests and finalize agent tool states

Share project JSON transport, interaction replies and report selectors.
Settle tool progress consistently for direct streams, reconnects and history, preserving failure reasons and stopped state.

src/features/workbench/api/workbench-sync-client.ts

@@ -1,3 +1,4 @@
+import { requestWorkbenchJson } from "./request-json";
 import { z } from "zod";
 import type { WorkbenchAccess } from "./request-context";
 import { env } from "@/shared/config/env";
@@ -63,13 +64,9 @@ export async function fetchWorkbenchSyncSnapshot(
   getAccessToken?: WorkbenchAccess,
   signal?: AbortSignal
 ): Promise<WorkbenchSyncSnapshot> {
-  const { project, accessToken } = await findOwnedWorkbenchProject(getAccessToken, signal);
-  const response = await fetch(`${SERVER_API_BASE_URL}/api/v1/workbench/sync-snapshot`, {
-    headers: createWorkbenchHeaders(accessToken, project.project_id),
-    signal
+  const payload = await requestWorkbenchJson("/api/v1/workbench/sync-snapshot", "工作台同步快照请求", {
+    access: getAccessToken, init: { signal }
   });
-  const payload: unknown = await response.json().catch(() => null);
-  if (!response.ok) throw new Error(getServerError(payload, response.status, "工作台同步快照请求"));
   const envelope = snapshotEnvelopeSchema.parse(payload);
   return {
     eventCursor: envelope.event_cursor,