fix: use require() for pdf-parse and pdfjs-dist legacy build to fix Node 24 compat

backend/src/receipt-parsing/receipt-parsing.service.ts

@@ -4,7 +4,8 @@
   Logger,
   ServiceUnavailableException,
 } from '@nestjs/common';
-import pdfParse from 'pdf-parse';
+// eslint-disable-next-line @typescript-eslint/no-require-imports, @typescript-eslint/no-var-requires
+const pdfParse = require('pdf-parse') as (buffer: Buffer) => Promise<{ text: string }>;
 
 const MISTRAL_API_URL = 'https://api.mistral.ai/v1/chat/completions';
 const RECEIPT_VISION_MODEL = 'mistral-small-2603';   // vision — används för bild-input
@@ -288,10 +289,12 @@ export class ReceiptParsingService {
     } catch (err) {
       this.logger.warn(`pdf-parse misslyckades: ${err}`);
       
-      // Fallback to pdfjs-dist for more complex PDFs
+      // Fallback to pdfjs-dist legacy build (Node.js compatible, no DOMMatrix needed)
       try {
-        const pdfjsLib = await import('pdfjs-dist');
-        const loadingTask = pdfjsLib.getDocument({ data: buffer });
+        // eslint-disable-next-line @typescript-eslint/no-require-imports
+        const pdfjsLib = require('pdfjs-dist/legacy/build/pdf.js') as typeof import('pdfjs-dist');
+        pdfjsLib.GlobalWorkerOptions.workerSrc = '';
+        const loadingTask = pdfjsLib.getDocument({ data: new Uint8Array(buffer) });
         const pdfDocument = await loadingTask.promise;
         
         let fullText = '';