feat(subscriptions): paying card set for several at once and kept in Firefly, quieter table

Each runway line says whether its card came from the last payment or
was set by hand; x selects bills and a sets the card for all of them,
stored in the Firefly preference ffui_bill_cards so every device sees
it. Price change moves to the subscription page, per year turns grey,
group sums follow the one-currency mode, key chips fit their buttons and
the panels no longer show a focus ring. Linking found payments is y.

src/lib/subscriptions/runway.ts

@@ -52,6 +52,8 @@ export interface Due {
   bill: Item<Bill>;
   card: Card | null;
   date: string;
+  lastPaid: string;
+  manual: boolean;
   native: Sum;
   overdue: boolean;
   pay: Sum;
@@ -238,6 +240,8 @@ export function dues(
         bill,
         card: who.card,
         date,
+        lastPaid: who.last?.date ?? "",
+        manual: who.manual,
         native,
         overdue,
         pay,