revert: restore legacy PDF417 barcode generation implementation

Restore custom PDF417 generator, renderer, and component that were previously removed. Update all components to use the legacy Pdf417Barcode instead of Pdf417BarcodeWasm.

Restored files:
- app/lib/pdf/pdf417.ts - Custom PDF417 generator library
- app/lib/pdf/renderBarcode.ts - Canvas-based barcode renderer
- app/ui/Pdf417Barcode.tsx - React component using custom generator

Updated imports in:
- app/ui/BillEditForm.tsx
- app/ui/PrintPreview.tsx
- app/ui/ViewBillCard.tsx
- app/ui/ViewLocationCard.tsx

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

app/ui/ViewLocationCard.tsx

@@ -13,7 +13,7 @@ import { LinkIcon } from "@heroicons/react/24/outline";
 import { uploadUtilBillsProofOfPayment } from "../lib/actions/locationActions";
 import QRCode from "react-qr-code";
 import { TicketIcon } from "@heroicons/react/24/solid";
-import { Pdf417BarcodeWasm } from "./Pdf417BarcodeWasm";
+import { Pdf417Barcode } from "./Pdf417Barcode";
 
 export interface ViewLocationCardProps {
     location: BillingLocation;
@@ -153,7 +153,7 @@ export const ViewLocationCard: FC<ViewLocationCardProps> = ({ location, userSett
                                 <li><strong>{t("payment-reference-label")}</strong><pre className="inline pl-1">{paymentParams.PozivNaBroj}</pre></li>
                             </ul>
                             <label className="label p-2 grow bg-white border border-gray-300 rounded-box justify-center">
-                                <Pdf417BarcodeWasm hub3aText={hub3aText} />
+                                <Pdf417Barcode hub3aText={hub3aText} />
                             </label>
                         </>
                         : null