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

hooks/use-mobile.ts

@@ -1,15 +1,15 @@
-import * as React from "react";
+import * as React from "react"
 
-const MOBILE_BREAKPOINT = 768;
+const MOBILE_BREAKPOINT = 768
 
 export function useIsMobile() {
   return React.useSyncExternalStore(
     (callback) => {
-      const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`);
-      mql.addEventListener("change", callback);
-      return () => mql.removeEventListener("change", callback);
+      const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`)
+      mql.addEventListener("change", callback)
+      return () => mql.removeEventListener("change", callback)
     },
     () => window.innerWidth < MOBILE_BREAKPOINT,
     () => false
-  );
+  )
 }