feat(plan): reuse standard tool confirmation for AskUser tool (#17864)

Co-authored-by: jacob314 <jacob314@gmail.com>

packages/core/src/tools/tools.ts

@@ -16,6 +16,7 @@ import {
   MessageBusType,
   type ToolConfirmationRequest,
   type ToolConfirmationResponse,
+  type Question,
 } from '../confirmation-bus/types.js';
 
 /**
@@ -695,7 +696,9 @@ export interface ToolEditConfirmationDetails {
 export interface ToolConfirmationPayload {
   // used to override `modifiedProposedContent` for modifiable tools in the
   // inline modify flow
-  newContent: string;
+  newContent?: string;
+  // used for askuser tool to return user's answers
+  answers?: { [questionIndex: string]: string };
 }
 
 export interface ToolExecuteConfirmationDetails {
@@ -725,11 +728,22 @@ export interface ToolInfoConfirmationDetails {
   urls?: string[];
 }
 
+export interface ToolAskUserConfirmationDetails {
+  type: 'ask_user';
+  title: string;
+  questions: Question[];
+  onConfirm: (
+    outcome: ToolConfirmationOutcome,
+    payload?: ToolConfirmationPayload,
+  ) => Promise<void>;
+}
+
 export type ToolCallConfirmationDetails =
   | ToolEditConfirmationDetails
   | ToolExecuteConfirmationDetails
   | ToolMcpConfirmationDetails
-  | ToolInfoConfirmationDetails;
+  | ToolInfoConfirmationDetails
+  | ToolAskUserConfirmationDetails;
 
 export enum ToolConfirmationOutcome {
   ProceedOnce = 'proceed_once',