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/Pdf417Barcode.tsx

@@ -0,0 +1,33 @@
+'use client';
+
+import { useState, useEffect, FC } from 'react';
+import { generateBarcode } from '../lib/pdf/pdf417';
+import { renderBarcode } from '../lib/pdf/renderBarcode';
+    
+export const Pdf417Barcode:FC<{hub3aText:string, className?: string, errorCorrectionLevel?: number}> = ({  hub3aText: hub3a_text, className, errorCorrectionLevel = 3}) => {
+    const [bitmapData, setBitmapData] = useState<string | undefined>(undefined);
+
+    console.log("Rendering Pdf417Barcode with hub3a_text:", hub3a_text);
+
+    useEffect(() => {
+        const aspectRatio = 3;
+        
+        const barcodeMatrix = generateBarcode(hub3a_text, errorCorrectionLevel , aspectRatio);
+        const bitmap = renderBarcode(barcodeMatrix, 1, 1);
+        setBitmapData(bitmap);
+    }, [hub3a_text]);
+
+    // Don't render until bitmap is generated (prevents hydration mismatch)
+    if (!bitmapData) {
+        return (
+            <div style={{ width: "350px", height: "92px" }} className="flex items-center justify-center">
+                <span className="loading loading-spinner loading-lg"></span>
+            </div>
+        );
+    }
+
+    return (
+        // eslint-disable-next-line @next/next/no-img-element
+        <img src={bitmapData} alt="PDF417 Barcode" className={className}  />
+    );
+}