chore: remove legacy PDF417 generation implementation

Delete custom PDF417 generator and renderer now that all components use zxing-wasm/writer. Removes Pdf417Barcode component, generateBarcode, and renderBarcode utilities.

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

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

app/lib/pdf/renderBarcode.ts

@@ -1,51 +0,0 @@
-import { BarcodeArray } from './pdf417';
-
-/**
- * Renders a PDF417 barcode matrix to a canvas and returns it as a data URL.
- *
- * This function creates an HTML canvas element, draws the barcode by iterating through
- * the barcode matrix, and converts the canvas to a base64-encoded PNG data URL that
- * can be used as an image source.
- *
- * @param barcodeMatrix - The barcode array generated by the PDF417 encoder containing
- *                        the barcode matrix data with dimensions and binary code values
- * @param blockWidth - The width in pixels of each individual barcode module (bar/space unit)
- * @param blockHeight - The height in pixels of each individual barcode module (bar/space unit)
- *
- * @returns A data URL string (base64-encoded PNG) representing the rendered barcode image,
- *          suitable for use in an HTML img src attribute
- *
- * @example
- * ```typescript
- * const pdf417 = createPDF417();
- * pdf417.init("Hello World", 2, 2);
- * const barcodeArray = pdf417.getBarcodeArray();
- * const dataUrl = renderBarcode(barcodeArray, 2, 4);
- * // dataUrl can now be used: <img src={dataUrl} />
- * ```
- */
-export function renderBarcode(barcodeMatrix: BarcodeArray, blockWidth: number, blockHeight: number) {
-  
-  const canvas = document.createElement('canvas');
-  canvas.width = barcodeMatrix.num_cols * blockWidth;
-  canvas.height = barcodeMatrix.num_rows * blockHeight;
-  const ctx = canvas.getContext('2d') as CanvasRenderingContext2D;
-
-  let positionY = 0;
-  for (let row = 0; row < barcodeMatrix.num_rows; row += 1) {
-    let positionX = 0;
-
-    for (let col = 0; col < barcodeMatrix.num_cols; col += 1) {
-      if (barcodeMatrix.bcode[row][col] === 1) {
-        ctx.fillStyle = '#000';
-      } else {
-        ctx.fillStyle = '#FFF';
-      }
-      ctx.fillRect(positionX, positionY, blockWidth, blockHeight);
-      positionX += blockWidth;
-    }
-    positionY += blockHeight;
-  }
-
-  return canvas.toDataURL();
-}

app/ui/Pdf417Barcode.tsx

@@ -1,29 +0,0 @@
-'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}> = ({hub3aText: hub3a_text, className}) => {
-    const [bitmapData, setBitmapData] = useState<string | undefined>(undefined);
-
-    useEffect(() => {
-        const barcodeMatrix = generateBarcode(hub3a_text);
-        const bitmap = renderBarcode(barcodeMatrix, 2, 2);
-        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} style={className ? undefined : { width: "350px", height: "92px" }} />
-    );
-}