feat: expand intelligent investigation workspace

src/features/agent/session-state/use-answer-view-state.ts

@@ -0,0 +1,16 @@
+import { useCallback, useContext, useSyncExternalStore } from "react";
+import type { Spec } from "@json-render/core";
+import type { AnswerViewStateScope } from "./answer-view-state-scope";
+import { AnswerViewPersistenceContext } from "./answer-view-persistence-context";
+
+export function useAnswerViewPersistence() { return useContext(AnswerViewPersistenceContext); }
+export function useAnswerViewState(scope: AnswerViewStateScope, sessionId: string, messageId: string, blockId: string, spec: Spec, enabled = true) {
+  const entry = scope.entry(sessionId, messageId, blockId, spec);
+  const snapshot = useSyncExternalStore(
+    useCallback((listener: () => void) => scope.subscribe(entry, listener, enabled), [scope, entry, enabled]),
+    () => entry.snapshot,
+    () => entry.snapshot,
+  );
+  return { ...snapshot, update: scope.update.bind(scope, entry), retry: () => scope.retry(entry),
+    reload: () => scope.reload(entry), resave: () => scope.resave(entry) };
+}