fix(coding-agent): add settled agent lifecycle event

closes #6363

packages/coding-agent/src/modes/interactive/interactive-mode.ts

@@ -1624,7 +1624,7 @@ export class InteractiveMode {
 				this.restoreQueuedMessagesToEditor({ abort: true });
 			},
 			commandContextActions: {
-				waitForIdle: () => this.session.agent.waitForIdle(),
+				waitForIdle: () => this.session.waitForIdle(),
 				newSession: async (options) => {
 					this.clearStatusIndicator();
 					try {
@@ -1674,7 +1674,7 @@ export class InteractiveMode {
 			},
 			shutdownHandler: () => {
 				this.shutdownRequested = true;
-				if (!this.session.isStreaming) {
+				if (this.session.isIdle) {
 					void this.shutdown();
 				}
 			},
@@ -1774,7 +1774,7 @@ export class InteractiveMode {
 			sessionManager: this.sessionManager,
 			modelRegistry: this.session.modelRegistry,
 			model: this.session.model,
-			isIdle: () => !this.session.isStreaming,
+			isIdle: () => this.session.isIdle,
 			isProjectTrusted: () => this.settingsManager.isProjectTrusted(),
 			signal: this.session.agent.signal,
 			abort: () => {
@@ -3024,11 +3024,13 @@ export class InteractiveMode {
 				}
 				this.pendingTools.clear();
 
-				await this.checkShutdownRequested();
-
 				this.ui.requestRender();
 				break;
 
+			case "agent_settled":
+				await this.checkShutdownRequested();
+				break;
+
 			case "compaction_start": {
 				if (this.settingsManager.getShowTerminalProgress()) {
 					this.ui.terminal.setProgress(true);