feat: add review shortcut confirmation setting

src/ui/review-shortcuts.ts

@@ -0,0 +1,43 @@
+import { SUBMIT_CHOICES } from "../constants/text.ts";
+
+const REVIEW_SHORTCUT_DIGIT_MIN = 1;
+const REVIEW_SHORTCUT_DIGIT_MAX = 3;
+
+export interface ReviewShortcutResolution {
+	actionIndex?: number;
+	confirmed: boolean;
+	pendingActionIndex?: number;
+}
+
+export function resolveReviewShortcutDoublePress(
+	digit: number,
+	pendingActionIndex?: number
+): ReviewShortcutResolution {
+	if (digit < REVIEW_SHORTCUT_DIGIT_MIN || digit > REVIEW_SHORTCUT_DIGIT_MAX) {
+		return { confirmed: false };
+	}
+
+	const actionIndex = digit - 1;
+	if (pendingActionIndex === actionIndex) {
+		return { actionIndex, confirmed: true };
+	}
+
+	return {
+		actionIndex,
+		confirmed: false,
+		pendingActionIndex: actionIndex,
+	};
+}
+
+export function getReviewShortcutHint(pendingActionIndex?: number): string {
+	if (pendingActionIndex === undefined) {
+		return "Press 1, 2, or 3 twice to confirm a review action.";
+	}
+
+	const actionLabel = SUBMIT_CHOICES[pendingActionIndex];
+	if (!actionLabel) {
+		return "Press 1, 2, or 3 twice to confirm a review action.";
+	}
+
+	return `Press ${pendingActionIndex + 1} again to ${actionLabel}.`;
+}