feat(web): add Agent Studio workspace UI

apps/web/src/assistant/use-harness-runtime.tsx

@@ -11,7 +11,7 @@ export type HarnessRuntimeStore = {
   cancel(): Promise<unknown>;
 };
 
-export function useHarnessRuntime(store: HarnessRuntimeStore) {
+export function useHarnessRuntime(store: HarnessRuntimeStore, options: { isSendDisabled?: boolean } = {}) {
   const snapshot = useSyncExternalStore(
     (subscriber) => store.subscribe(subscriber),
     () => store.getSnapshot(),
@@ -32,6 +32,7 @@ export function useHarnessRuntime(store: HarnessRuntimeStore) {
     messages,
     convertMessage: (message) => message,
     isRunning,
+    isSendDisabled: options.isSendDisabled,
     onNew: async (message) => {
       await store.sendMessage(extractMessageInput(message));
     },