test: add regression test for interview-ui notes loop (#3502)

Exercises the goNextOrSubmit → notes auto-open path to ensure:
- Enter after typing a note advances instead of looping
- Empty notes still trigger the auto-open
- Normal option selection is unaffected

Fixes #3502

src/resources/extensions/shared/tests/interview-notes-loop.test.ts

@@ -0,0 +1,144 @@
+// GSD2 — Regression test for interview-ui "None of the above" notes loop
+// Copyright (c) 2026 Jeremy McSpadden <jeremy@fluxlabs.net>
+
+/**
+ * Regression test for bug #3502:
+ *
+ * Selecting "None of the above" opens the notes field, but pressing Enter
+ * after typing a note called goNextOrSubmit() which saw the cursor still
+ * on the "None of the above" slot and re-opened notes — trapping the user
+ * in an infinite loop.
+ *
+ * The fix adds a `!states[currentIdx].notes` guard so auto-open only fires
+ * when notes are still empty.
+ */
+
+import { describe, it } from "node:test";
+import assert from "node:assert/strict";
+import { showInterviewRound, type Question, type RoundResult } from "../interview-ui.js";
+
+// Raw terminal sequences that matchesKey() recognises
+const ENTER = "\r";
+const DOWN = "\x1b[B";
+const TAB = "\t";
+
+/**
+ * Drive showInterviewRound with a scripted sequence of key inputs.
+ * We mock ctx.ui.custom() to capture the widget, feed it inputs, and
+ * resolve when done() is called.
+ */
+function runWithInputs(
+	questions: Question[],
+	inputs: string[],
+): Promise<RoundResult> {
+	return new Promise((resolve, reject) => {
+		const timeout = setTimeout(() => reject(new Error("Timed out — likely stuck in infinite loop")), 3000);
+
+		const mockCtx = {
+			ui: {
+				custom: (factory: any) => {
+					const mockTui = {
+						requestRender: () => {},
+					};
+					const mockTheme = {
+						// Minimal theme stubs — render output is not asserted
+						fg: (_c: string, t: string) => t,
+						bold: (t: string) => t,
+						dim: (t: string) => t,
+						italic: (t: string) => t,
+						strikethrough: (t: string) => t,
+						accent: (t: string) => t,
+						success: (t: string) => t,
+						warning: (t: string) => t,
+						error: (t: string) => t,
+						info: (t: string) => t,
+						muted: (t: string) => t,
+						dimmed: (t: string) => t,
+					};
+					const mockKb = {};
+
+					const widget = factory(mockTui, mockTheme, mockKb, (result: RoundResult) => {
+						clearTimeout(timeout);
+						resolve(result);
+					});
+
+					// Feed each input sequentially
+					for (const input of inputs) {
+						widget.handleInput(input);
+					}
+				},
+			},
+		};
+
+		showInterviewRound(questions, {}, mockCtx as any).catch(reject);
+	});
+}
+
+describe("interview-ui notes loop regression (#3502)", () => {
+	const questions: Question[] = [
+		{
+			id: "q1",
+			header: "Project Type",
+			question: "What type of project?",
+			options: [
+				{ label: "Web App", description: "Frontend or full-stack" },
+				{ label: "CLI Tool", description: "Command-line utility" },
+			],
+		},
+	];
+
+	it("does not loop when Enter is pressed after typing a note on 'None of the above'", async () => {
+		// With 2 options, "None of the above" is index 2 (0-based)
+		// Cursor starts at 0, so press Down twice to reach it
+		const result = await runWithInputs(questions, [
+			DOWN,        // cursor → index 1 (CLI Tool)
+			DOWN,        // cursor → index 2 (None of the above)
+			ENTER,       // commit → auto-opens notes field
+			"u", "n", "s", "u", "r", "e",  // type "unsure"
+			ENTER,       // should advance to review, NOT reopen notes
+			ENTER,       // submit from review screen
+		]);
+
+		// If we get here, the loop did not occur (timeout would have fired)
+		assert.ok(result, "should return a result");
+		assert.equal(result.endInterview, false);
+
+		const answer = result.answers.q1;
+		assert.ok(answer, "answer for q1 should exist");
+		assert.equal(answer.notes, "unsure", "notes should contain typed text");
+		assert.equal(answer.selected, "None of the above");
+	});
+
+	it("still auto-opens notes when selecting 'None of the above' with no prior notes", async () => {
+		// Press Down twice to "None of the above", Enter to select
+		// Then immediately Enter again (empty notes) — this should re-open notes
+		// because the guard only skips when notes are non-empty.
+		// Type something on second open, then Enter to proceed.
+		const result = await runWithInputs(questions, [
+			DOWN,        // cursor → 1
+			DOWN,        // cursor → 2 (None of the above)
+			ENTER,       // commit → auto-opens notes
+			ENTER,       // empty notes → goNextOrSubmit → should re-open notes (empty guard)
+			"o", "k",    // type "ok"
+			ENTER,       // now notes = "ok" → should advance to review
+			ENTER,       // submit
+		]);
+
+		assert.ok(result, "should return a result");
+		const answer = result.answers.q1;
+		assert.ok(answer, "answer for q1 should exist");
+		assert.equal(answer.notes, "ok");
+	});
+
+	it("normal option selection is unaffected", async () => {
+		const result = await runWithInputs(questions, [
+			ENTER,       // select first option (Web App) and advance to review
+			ENTER,       // submit from review screen
+		]);
+
+		assert.ok(result, "should return a result");
+		const answer = result.answers.q1;
+		assert.ok(answer, "answer for q1 should exist");
+		assert.equal(answer.selected, "Web App");
+	});
+});