Add the Monolith and Cobalt Stripe templates

Standalone layouts for reference templates 3 and 8, with the user's logo sized to the
placeholder box, a CapRule decor primitive, optional TableRows rule/heading options,
and a separate 1..45-row sweep test file.

src/pdf/templates/catalog.ts

@@ -5,7 +5,7 @@
 export interface TemplateCatalogEntry {
   id: string;
   name: string;
-  family: "classic" | "neutral" | "ledger" | "band" | "northline";
+  family: "classic" | "neutral" | "ledger" | "band" | "northline" | "standalone";
   /** Static PNG from /public, written by scripts/thumbnails.mjs (sample data, not the user's invoice). */
   thumbnail: string;
   badge?: "Matches your original format";
@@ -19,6 +19,7 @@ export const FAMILY_LABELS: Record<TemplateCatalogEntry["family"], string> = {
   ledger: "Ledger",
   band: "Band",
   northline: "Northline",
+  standalone: "Standalone",
 };
 
 /** Picker order: Classic first, Linea (the vendor's original format) second. */
@@ -33,6 +34,8 @@ export const TEMPLATE_CATALOG: readonly TemplateCatalogEntry[] = [
   { 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" },
+  { id: "monolith", name: "Monolith", family: "standalone", thumbnail: "/templates/monolith.png" },
+  { id: "cobalt-stripe", name: "Cobalt Stripe", family: "standalone", thumbnail: "/templates/cobalt-stripe.png" },
 ];
 
 /** The entry for an id; an unknown id falls back to Classic, like getTemplate. */