Add the Northline template family: Purple Pop and Citrus Split

Purple Pop (cream page, purple pills, asterisk and dome decor, opt-in
logo) and Citrus Split (grey split panel, halftone chevrons, icon
contacts, logo in the measured slot) are rebuilt from the Canva PDFs on
the engine with A4/Letter support, GST slots and zero audit errors. Adds
static DM Sans, Jost and Poppins 800 as look-alikes for the commercial
fonts. The picker now lists ten templates.

src/pdf/fonts/register.test.ts

@@ -14,9 +14,11 @@ const goodFont = () => {
 describe("font manifest", () => {
   it("lists the bundled families", () => {
     expect(FONT_FAMILIES).toEqual([
+      "DM Sans",
       "IBM Plex Mono",
       "IBM Plex Sans",
       "Inter",
+      "Jost",
       "Montserrat",
       "Noto Sans Devanagari",
       "Noto Sans Kannada",

src/pdf/fonts/roles.ts

@@ -6,7 +6,19 @@
  * TYPE_ROLES holds Classic's values. Every other template declares its own role table (see
  * defineRoles) from the faces below and passes those tokens wherever a role is accepted.
  */
-export type FaceKey = "IBM Plex Sans" | "IBM Plex Mono" | "Montserrat" | "Open Sans" | "Poppins" | "Inter";
+export type FaceKey =
+  | "IBM Plex Sans"
+  | "IBM Plex Mono"
+  | "Montserrat"
+  | "Open Sans"
+  | "Poppins"
+  | "Inter"
+  | "DM Sans"
+  | "Jost"
+  // Licensed faces of the Canva designs; SUBSTITUTES maps each to the bundled look-alike.
+  | "Now"
+  | "Gotham"
+  | "Open Sauce One";
 
 export interface TypeToken {
   face: FaceKey;
@@ -55,9 +67,15 @@ export function defineRoles<const T extends Record<string, TypeToken>>(table: T)
 
 /**
  * Licensed template faces (Now, Gotham, Open Sauce One, ...) map to the OFL look-alike that is
- * actually bundled. Empty until those families are registered.
+ * actually bundled. A user-imported font replaces the licensed name through `faceOverrides`.
+ * Gotham runs about 4% narrower than Montserrat, so tokens that use it carry sizes already scaled by
+ * GOTHAM_SIZE (see templates/northline); a real Gotham import would need them back at 1.
  */
-export const SUBSTITUTES: Readonly<Record<string, string>> = {};
+export const SUBSTITUTES: Readonly<Record<string, string>> = {
+  Now: "Jost",
+  Gotham: "Montserrat",
+  "Open Sauce One": "Poppins",
+};
 
 /** The family name to register/look up for a face: user override first, then substitute, then itself. */
 export function resolveFace(face: string, overrides?: Readonly<Record<string, string>>): string {