(refactor) Move generateShareId to locationActions and apply to LocationCard

- Moved generateShareId from shareChecksum.ts to locationActions.ts as a server action
- Updated LocationCard to use shareID with checksum for proof of payment download link
- Replaced Link with AsyncLink to handle async shareID generation
- Commented out debug console.log in Pdf417Barcode

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

web-app/app/lib/actions/locationActions.ts

@@ -10,7 +10,7 @@ import { gotoHomeWithMessage } from './navigationActions';
 import { unstable_noStore, revalidatePath } from 'next/cache';
 import { IntlTemplateFn } from '@/app/i18n';
 import { getTranslations, getLocale } from "next-intl/server";
-import { generateShareId, extractShareId, validateShareChecksum } from '../shareChecksum';
+import { extractShareId, validateShareChecksum, generateShareChecksum } from '../shareChecksum';
 import { validatePdfFile } from '../validators/pdfValidator';
 import { checkUploadRateLimit } from '../uploadRateLimiter';
 
@@ -765,6 +765,18 @@ export const uploadUtilBillsProofOfPayment = async (
     }
 }
 
+
+/**
+ * Generate combined location ID with checksum appended
+ * @param locationId - The MongoDB location ID (24 chars)
+ * @returns Combined ID: locationId + checksum (40 chars total)
+ */
+export async function generateShareId(locationId: string): Promise<string> {
+  const checksum = generateShareChecksum(locationId);
+  return locationId + checksum;
+}
+
+
 /**
  * Generate/activate share link for location
  * Called when owner clicks "Share" button
@@ -800,7 +812,7 @@ export const generateShareLink = withUser(
     );
 
     // Generate combined share ID (locationId + checksum)
-    const shareId = generateShareId(locationId);
+    const shareId = await generateShareId(locationId);
 
     // Build share URL
     const baseUrl = process.env.NEXTAUTH_URL || 'http://localhost:3000';