Restore stable version of reconciliation page and update notifications

Rollback BLReconciliation component to a previous stable state and switch to standard shadcn/ui Toaster, resolving React error #310.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: b163d4c0-de5e-4f4e-a9c0-aed4c7049718
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/1957c339-2757-4d1f-8e92-e9f71a1ce58e/b163d4c0-de5e-4f4e-a9c0-aed4c7049718/J7uLHW5

client/src/App.tsx

@@ -1,6 +1,6 @@
 import { queryClient } from "./lib/queryClient";
 import { QueryClientProvider } from "@tanstack/react-query";
-import { ToasterRobust } from "@/components/ToasterRobust";
+import { Toaster } from "@/components/ui/toaster";
 import { TooltipProvider } from "@/components/ui/tooltip";
 import RouterProduction from "@/components/RouterProduction";
 import ErrorBoundary from "@/components/ErrorBoundary";
@@ -10,7 +10,7 @@ function App() {
     <ErrorBoundary>
       <QueryClientProvider client={queryClient}>
         <TooltipProvider>
-          <ToasterRobust />
+          <Toaster />
           <RouterProduction />
         </TooltipProvider>
       </QueryClientProvider>