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/app-header.tsx

@@ -7,9 +7,7 @@ import {
   BreadcrumbSeparator,
 } from "@/components/ui/breadcrumb"
 import { Separator } from "@/components/ui/separator"
-import {
-  SidebarTrigger,
-} from "@/components/ui/sidebar"
+import { SidebarTrigger } from "@/components/ui/sidebar"
 import { ThemeToggle } from "@/components/theme-toggle"
 
 export function AppHeader({ title }: { title: string }) {
@@ -17,7 +15,7 @@ export function AppHeader({ title }: { title: string }) {
 
   return (
     <header className="flex h-16 shrink-0 items-center justify-between gap-2 border-b px-4 transition-[width,height] ease-linear group-has-data-[collapsible=icon]/sidebar-wrapper:h-12">
-      <div className="flex min-w-0 h-5 items-center gap-2">
+      <div className="flex h-5 min-w-0 items-center gap-2">
         <SidebarTrigger className="-ml-1" />
         <Separator orientation="vertical" className="mr-2" />
         <Breadcrumb>