refactor: rename share URL path from location to bills-due

- Renamed directory: app/[locale]/share/location -> app/[locale]/share/bills-due
- Updated all URL references in web-app (billActions, locationActions, ViewBillCard)
- Updated all URL references in email-worker templates (4 email templates)
- Updated documentation in sprints/email-worker.md

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

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

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

@@ -627,7 +627,7 @@ export const uploadProofOfPayment = async (
     await cleanupExpiredShares(dbClient);
 
     // 8. REVALIDATE CACHE
-    revalidatePath(`/share/location/${shareId}`, 'page');
+    revalidatePath(`/share/bills-due/${shareId}`, 'page');
 
     return { success: true };
 

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

@@ -775,7 +775,7 @@ export const uploadUtilBillsProofOfPayment = async (
             );
 
         // 7. REVALIDATE CACHE
-        revalidatePath(`/share/location/${shareId}`, 'page');
+        revalidatePath(`/share/bills-due/${shareId}`, 'page');
 
         return { success: true };
     } catch (error: any) {
@@ -823,7 +823,7 @@ export const generateShareLink = withUser(
 
     // Build share URL
     const baseUrl = process.env.NEXTAUTH_URL || 'http://localhost:3000';
-    const shareUrl = `${baseUrl}/share/location/${shareId}`;
+    const shareUrl = `${baseUrl}/share/bills-due/${shareId}`;
 
     return { shareUrl };
   }

web-app/app/ui/ViewBillCard.tsx

@@ -167,7 +167,7 @@ export const ViewBillCard: FC<ViewBillCardProps> = ({ location, bill, shareId })
                 }
 
                 <div className="text-right">
-                    <Link className="btn btn-neutral ml-3" href={`/share/location/${shareId || locationID}`}>{t("back-button")}</Link>
+                    <Link className="btn btn-neutral ml-3" href={`/share/bills-due/${shareId || locationID}`}>{t("back-button")}</Link>
                 </div>
 
             </div>