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/[locale]/home/account/settings/page.tsx

@@ -0,0 +1,33 @@
+import { FC, Suspense } from 'react';
+import { Main } from '@/app/ui/Main';
+import { UserSettingsForm as UserSettingsForm, UserSettingsFormSkeleton } from '@/app/ui/UserSettingsForm';
+import { getUserSettings } from '@/app/lib/actions/userSettingsActions';
+
+const UserSettingsPage: FC = async () => {
+    const userSettings = await getUserSettings();
+
+    return (
+        <Main>
+            <div className="flex flex-col items-center">
+                <UserSettingsForm userSettings={userSettings} />
+            </div>
+        </Main>
+    );
+};
+
+const Page: FC = () => {
+    return (
+        <Suspense fallback={
+            <Main>
+                <div className="flex flex-col items-center">
+                    <div className="h-8 w-48 skeleton mb-4"></div>
+                    <UserSettingsFormSkeleton />
+                </div>
+            </Main>
+        }>
+            <UserSettingsPage />
+        </Suspense>
+    );
+};
+
+export default Page;