feat(subscriptions): cash runway per card, price changes, stale bills, unlinked payments

The page opens with how much each paying card needs by a date and where
it falls short, a 30-day calendar per card and the annual renewals ahead.
The table shows price changes, the paying card, stale subscriptions to
deactivate in place and payments that look like a subscription, L links
them.

src/lib/subscriptions/queries.ts

@@ -0,0 +1,46 @@
+import { api } from "#lib/api/client.js";
+import { all } from "#lib/api/lists.js";
+import type { Bill, Item, Page, TransactionGroup } from "#lib/api/types.js";
+import { addDays } from "#lib/dates.js";
+import { toPayments } from "./runway.js";
+
+const SEARCH_LIMIT = 500;
+const UNLINKED_DAYS = 92;
+
+async function search(query: string): Promise<Item<TransactionGroup>[]> {
+  const read = (page: number) =>
+    api<Page<TransactionGroup>>("/v1/search/transactions", {
+      query: { limit: SEARCH_LIMIT, page, query },
+    });
+  const first = await read(1);
+  const pages = first.meta.pagination?.total_pages ?? 1;
+  const rest = await Promise.all(
+    Array.from({ length: Math.max(0, pages - 1) }, (_, i) => read(i + 2))
+  );
+  const seen = new Map<string, Item<TransactionGroup>>();
+  for (const group of [first, ...rest].flatMap((page) => page.data)) {
+    seen.set(group.id, group);
+  }
+  return [...seen.values()];
+}
+
+export const runwayQueries = {
+  bills: (start: string, end: string) => ({
+    queryFn: () => all<Bill>("/v1/bills", { end, start }),
+    queryKey: ["subscriptions", "runway", start, end],
+  }),
+  paid: () => ({
+    queryFn: async () => toPayments(await search("has_any_bill:true")),
+    queryKey: ["subscriptions", "payments"],
+  }),
+  unlinked: (day: string) => {
+    const after = addDays(day, -UNLINKED_DAYS);
+    return {
+      queryFn: async () =>
+        toPayments(
+          await search(`has_no_bill:true type:withdrawal date_after:${after}`)
+        ).filter((payment) => !payment.billId),
+      queryKey: ["subscriptions", "unlinked", after],
+    };
+  },
+};