refactor: convert repository to monorepo with npm workspaces

Restructured the repository into a monorepo to better organize application code
and maintenance scripts.

## Workspace Structure
- web-app: Next.js application (all app code moved from root)
- housekeeping: Database backup and maintenance scripts

## Key Changes
- Moved all application code to web-app/ using git mv
- Moved database scripts to housekeeping/ workspace
- Updated Dockerfile for monorepo build process
- Updated docker-compose files (volume paths: ./web-app/etc/hosts/)
- Updated .gitignore for workspace-level node_modules
- Updated documentation (README.md, CLAUDE.md, CHANGELOG.md)

## Migration Impact
- Root package.json now manages workspaces
- Build commands delegate to web-app workspace
- All file history preserved via git mv
- Docker build process updated for workspace structure

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

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

web-app/app/ui/ViewBillBadge.tsx

@@ -0,0 +1,31 @@
+import { FC } from "react";
+import { Bill } from "@/app/lib/db-types";
+import Link from "next/link";
+import { TicketIcon } from "@heroicons/react/24/outline";
+import { useLocale } from "next-intl";
+
+export interface ViewBillBadgeProps {
+    locationId: string;
+    shareId?: string;
+    bill: Bill;
+};
+
+export const ViewBillBadge: FC<ViewBillBadgeProps> = ({ locationId, shareId, bill: { _id: billId, name, paid, attachment, proofOfPayment } }) => {
+
+    const currentLocale = useLocale();
+
+    const className = `badge badge-lg p-[1em] ${paid ? "badge-success" : " badge-outline"} ${!paid && !!attachment ? "btn-outline btn-success" : ""}  cursor-pointer`;
+
+    // Use shareId if available (for shared views), otherwise use locationId (for owner views)
+    const billPageId = shareId || locationId;
+
+    return (
+        <Link href={`/${currentLocale}//share/bill/${billPageId}-${billId}`} className={className}>
+            {name}
+            {
+                proofOfPayment?.uploadedAt ? 
+                <TicketIcon className="h-[1em] w-[1em] inline-block ml-1" /> : null
+            }
+        </Link>
+    );
+}