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/PrintPreview.tsx

@@ -1,7 +1,7 @@
 'use client';
 
 import { PrintBarcodeData } from '../lib/actions/printActions';
-import { Pdf417BarcodeWasm } from './Pdf417BarcodeWasm';
+import { Pdf417Barcode } from './Pdf417Barcode';
 
 export interface PrintPreviewProps {
   data: PrintBarcodeData[];
@@ -132,7 +132,7 @@ export const PrintPreview: React.FC<PrintPreviewProps> = ({ data, year, month, t
                 <td className="border-2 border-gray-800 px-3 py-1.5 text-center">
                   <div className="flex justify-center items-center">
                     {
-                      item.hub3aText ? <Pdf417BarcodeWasm hub3aText={item.hub3aText} className="print:m-[5em_auto]" /> : null
+                      item.hub3aText ? <Pdf417Barcode hub3aText={item.hub3aText} /> : null
                     }
                   </div>
                 </td>