Replace the sample data with synthetic fixtures and regenerate goldens and thumbnails

The template harness, tests and thumbnails now use a neutral vendor, bank account and
a generated sample wordmark (scripts/logo/make-sample-logo.mjs). Layout goldens and the
14 picker thumbnails are regenerated. Fixture strings keep their original lengths where
layout tests depend on them.

src/lib/types.ts

@@ -273,7 +273,7 @@ export const INDIAN_STATES: { code: string; name: string }[] = [
   { code: "09", name: "Uttar Pradesh" },
   { code: "10", name: "Bihar" },
   { code: "11", name: "Sikkim" },
-  { code: "12", name: "Sampleachal Pradesh" },
+  { code: "12", name: "Arunachal Pradesh" },
   { code: "13", name: "Nagaland" },
   { code: "14", name: "Manipur" },
   { code: "15", name: "Mizoram" },