feat(ledger): add bookkeeping workbench and transaction views

- Add transactions_dirty table and zero-tolerance cleansing action

- Implement bookkeeping workbench (/bookkeeping) with searchable Combobox channel selector and card suffix / account identifier

- Implement transaction ledger (/transactions) with date groupings, multi-currency metrics, and filters

- Update AGENTS.md guidelines for Base UI Select and Combobox bindings

proxy.ts

@@ -1,12 +1,12 @@
-import NextAuth from "next-auth";
-import { authConfig } from "@/lib/auth/config";
+import NextAuth from "next-auth"
+import { authConfig } from "@/lib/auth/config"
 
-const { auth } = NextAuth(authConfig);
+const { auth } = NextAuth(authConfig)
 
-export const proxy = auth;
+export const proxy = auth
 
-export default auth;
+export default auth
 
 export const config = {
   matcher: ["/((?!api|_next/static|_next/image|favicon.ico).*)"],
-};
+}