chore: enforce erasable TypeScript syntax

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

@@ -147,14 +147,19 @@ function isExpandable(obj: unknown): obj is Expandable {
 }
 
 class ExpandableText extends Text implements Expandable {
+	private readonly getCollapsedText: () => string;
+	private readonly getExpandedText: () => string;
+
 	constructor(
-		private readonly getCollapsedText: () => string,
-		private readonly getExpandedText: () => string,
+		getCollapsedText: () => string,
+		getExpandedText: () => string,
 		expanded = false,
 		paddingX = 0,
 		paddingY = 0,
 	) {
 		super(expanded ? getExpandedText() : getCollapsedText(), paddingX, paddingY);
+		this.getCollapsedText = getCollapsedText;
+		this.getExpandedText = getExpandedText;
 	}
 
 	setExpanded(expanded: boolean): void {
@@ -334,6 +339,8 @@ export class InteractiveMode {
 	// Custom header from extension (undefined = use built-in header)
 	private customHeader: (Component & { dispose?(): void }) | undefined = undefined;
 
+	private options: InteractiveModeOptions;
+
 	// Convenience accessors
 	private get session(): AgentSession {
 		return this.runtimeHost.session;
@@ -348,11 +355,9 @@ export class InteractiveMode {
 		return this.session.settingsManager;
 	}
 
-	constructor(
-		runtimeHost: AgentSessionRuntime,
-		private options: InteractiveModeOptions = {},
-	) {
+	constructor(runtimeHost: AgentSessionRuntime, options: InteractiveModeOptions = {}) {
 		this.runtimeHost = runtimeHost;
+		this.options = options;
 		this.runtimeHost.setBeforeSessionInvalidate(() => {
 			this.resetExtensionUI();
 		});