Add complete Biblical Guide web application with Material UI

Implemented comprehensive Romanian Biblical Guide web app:
- Next.js 15 with App Router and TypeScript
- Material UI 7.3.2 for modern, responsive design
- PostgreSQL database with Prisma ORM
- Complete Bible reader with book/chapter navigation
- AI-powered biblical chat with Romanian responses
- Prayer wall for community prayer requests
- Advanced Bible search with filters and highlighting
- Sample Bible data imported from API.Bible
- All API endpoints created and working
- Professional Material UI components throughout
- Responsive layout with navigation and theme

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

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

components/providers/theme-provider.tsx

@@ -0,0 +1,16 @@
+'use client'
+import { ThemeProvider } from '@mui/material/styles'
+import CssBaseline from '@mui/material/CssBaseline'
+import { AppRouterCacheProvider } from '@mui/material-nextjs/v13-appRouter'
+import theme from '@/lib/theme'
+
+export function MuiThemeProvider({ children }: { children: React.ReactNode }) {
+  return (
+    <AppRouterCacheProvider>
+      <ThemeProvider theme={theme}>
+        <CssBaseline />
+        {children}
+      </ThemeProvider>
+    </AppRouterCacheProvider>
+  )
+}