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/templates/catalog.ts

@@ -5,7 +5,7 @@
 export interface TemplateCatalogEntry {
   id: string;
   name: string;
-  family: "classic" | "neutral" | "ledger" | "band";
+  family: "classic" | "neutral" | "ledger" | "band" | "northline";
   /** Static PNG from /public, written by scripts/thumbnails.mjs (sample data, not the user's invoice). */
   thumbnail: string;
   badge?: "Matches your original format";
@@ -18,6 +18,7 @@ export const FAMILY_LABELS: Record<TemplateCatalogEntry["family"], string> = {
   neutral: "Neutral",
   ledger: "Ledger",
   band: "Band",
+  northline: "Northline",
 };
 
 /** Picker order: Classic first, Linea (the vendor's original format) second. */
@@ -30,6 +31,8 @@ export const TEMPLATE_CATALOG: readonly TemplateCatalogEntry[] = [
   { id: "tangerine-ledger", name: "Tangerine Ledger", family: "ledger", thumbnail: "/templates/tangerine-ledger.png" },
   { id: "slate-band", name: "Slate Band", family: "band", thumbnail: "/templates/slate-band.png" },
   { id: "teal-swoosh", name: "Teal Swoosh", family: "band", thumbnail: "/templates/teal-swoosh.png" },
+  { id: "purple-pop", name: "Purple Pop", family: "northline", thumbnail: "/templates/purple-pop.png", logoOptIn: true },
+  { id: "citrus-split", name: "Citrus Split", family: "northline", thumbnail: "/templates/citrus-split.png" },
 ];
 
 /** The entry for an id; an unknown id falls back to Classic, like getTemplate. */