Standardize create-flow option steps on one question-and-options layout and Selection sizes.

Method cards, chips, and the right rail now share the two-column shell; last options clear the footer fade, See all stays under the stack, and the left heading no longer jumps when the list expands.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/propNormalization.ts

@@ -203,6 +203,16 @@ export type ChipPaletteValue = (typeof CHIP_PALETTE_OPTIONS)[number];
 export const CHIP_SIZE_OPTIONS = ["s", "m"] as const;
 export type ChipSizeValue = (typeof CHIP_SIZE_OPTIONS)[number];
 
+export const SELECTION_SIZE_OPTIONS = ["s", "m", "l"] as const;
+export type SelectionSizeValue = (typeof SELECTION_SIZE_OPTIONS)[number];
+
+export const SELECTION_ORIENTATION_OPTIONS = [
+  "horizontal",
+  "vertical",
+] as const;
+export type SelectionOrientationValue =
+  (typeof SELECTION_ORIENTATION_OPTIONS)[number];
+
 export const MULTI_SELECT_SIZE_OPTIONS = ["s", "m"] as const;
 export type MultiSelectSizeValue = (typeof MULTI_SELECT_SIZE_OPTIONS)[number];