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

components/ui/breadcrumb.tsx

@@ -84,9 +84,7 @@ function BreadcrumbSeparator({
       className={cn("[&>svg]:size-3.5", className)}
       {...props}
     >
-      {children ?? (
-        <ChevronRightIcon />
-      )}
+      {children ?? <ChevronRightIcon />}
     </li>
   )
 }
@@ -106,8 +104,7 @@ function BreadcrumbEllipsis({
       )}
       {...props}
     >
-      <MoreHorizontalIcon
-      />
+      <MoreHorizontalIcon />
       <span className="sr-only">More</span>
     </span>
   )