Add saved sign text size controls with independent QR sizing

packages/contracts/src/sign.test.ts

@@ -1,6 +1,16 @@
 import { expect, test } from "bun:test";
 import { savedSignSchema } from "./sign";
 
+test("text sizing survives saved design round trips and rejects invalid scales", () => {
+  const base = { title: "Event", headline: "Share", message: "Welcome", paper: "letter", ink: "indigo" };
+  expect(savedSignSchema.parse(base).headlineScale).toBeUndefined();
+  const sized = { ...base, headlineScale: 150, messageScale: 125, titleScale: 75 };
+  expect(savedSignSchema.parse(JSON.parse(JSON.stringify(sized)))).toEqual(sized);
+  for (const key of ["headlineScale", "messageScale", "titleScale"]) {
+    for (const value of [0, 74, 151, Infinity, NaN, "125"]) expect(savedSignSchema.safeParse({ ...base, [key]: value }).success).toBe(false);
+  }
+});
+
 test("saved designs reject unsafe assets, invalid settings, and embedded runtime fonts", () => {
   const design = { title: "Our event", headline: "Share your moments", message: "Photos welcome", paper: "card6x4", ink: "indigo" };
   expect(savedSignSchema.safeParse(design).success).toBe(true);

packages/contracts/src/sign.ts

@@ -29,6 +29,9 @@ const papers: ["custom", ...(keyof typeof SIGN_PAPERS)[]] = ["custom", ...Object
 export const savedSignSchema = z.object({
   title: z.string().trim().min(1).max(120), headline: z.string().trim().min(1).max(44),
   message: z.string().trim().min(1).max(120),
+  headlineScale: z.number().finite().min(75).max(150).optional(),
+  messageScale: z.number().finite().min(75).max(150).optional(),
+  titleScale: z.number().finite().min(75).max(150).optional(),
   paper: z.enum(papers),
   ink: z.enum(["indigo", "black"]), layout: z.enum(["photo", "typography", "compact"]).optional(),
   customWidth: z.number().finite().optional(), customHeight: z.number().finite().optional(),