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/BillEditForm.tsx

@@ -10,7 +10,7 @@ import { formatYearMonth } from "../lib/format";
 import { DecodeResult, findDecodePdf417 } from "../lib/pdf/barcodeDecoderWasm";
 import { useLocale, useTranslations } from "next-intl";
 import { InfoBox } from "./InfoBox";
-import { Pdf417BarcodeWasm } from "./Pdf417BarcodeWasm";
+import { Pdf417Barcode } from "./Pdf417Barcode";
 
 // Next.js does not encode an utf-8 file name correctly when sending a form with a file attachment
 // This is a workaround for that
@@ -203,7 +203,7 @@ export const BillEditForm: FC<BillEditFormProps> = ({ location, bill }) => {
                         hub3aText ?
                             <div className="form-control p-1">
                                 <label className="label p-2 grow bg-white border border-gray-300 rounded-box justify-center">
-                                    <Pdf417BarcodeWasm hub3aText={hub3aText} />
+                                    <Pdf417Barcode hub3aText={hub3aText} />
                                 </label>
                                 <p className="text-xs my-1">{t.rich('barcode-disclaimer', { br: () => <br /> })}</p>
                             </div> : null