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/tailwind.config.ts

@@ -0,0 +1,64 @@
+import type { Config } from 'tailwindcss';
+
+const config: Config = {
+  content: [
+    './pages/**/*.{js,ts,jsx,tsx,mdx}',
+    './components/**/*.{js,ts,jsx,tsx,mdx}',
+    './app/**/*.{js,ts,jsx,tsx,mdx}',
+  ],
+  theme: {
+    extend: {
+      gridTemplateColumns: {
+        '13': 'repeat(13, minmax(0, 1fr))',
+      },
+      colors: {
+        blue: {
+          400: '#2589FE',
+          500: '#0070F3',
+          600: '#2F6FEB',
+        },
+      },
+      animation: {
+        'expand-fade-in': 'expandFadeIn 0.3s ease-in-out forwards',
+      },
+    },
+    keyframes: {
+      shimmer: {
+        '100%': {
+          transform: 'translateX(100%)',
+        },
+      },
+      animateDown: {
+        '0%': {
+          opacity: '0',
+          transform: 'translateY(-15px)',
+          maxHeight: '0px',
+        },
+        '100%': {
+          opacity: '1',
+          transform: 'translateY(0)',
+          maxHeight: '200px',
+        },
+      },
+      expandFadeIn: {
+        '0%': {
+          opacity: '0',
+          transform: 'scaleY(0.95)',
+        },
+        '100%': {
+          opacity: '1',
+          transform: 'scaleY(1)',
+        },
+      },
+    },
+  },
+  plugins: [
+    require("@tailwindcss/typography"),
+    require("daisyui")
+  ],
+  daisyui: {
+    themes: ["dark", "night", "business", "dracula"], // only including dark themes
+    darkTheme: "dark", // default dark theme
+  }
+};
+export default config;