Implement complete multi-language support with Romanian/English

- Added next-intl for internationalization with Romanian as default locale
- Restructured app directory with [locale] routing (/ro, /en)
- Created comprehensive translation files for both languages
- Fixed Next.js 15 async params compatibility in layout components
- Updated all components to use proper i18n hooks and translations
- Configured middleware for locale routing and fallbacks
- Fixed FloatingChat component translation array handling
- Restored complete home page with internationalized content
- Fixed Material-UI Slide component prop error (mountOnExit → unmountOnExit)

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

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

components/layout/language-switcher.tsx

@@ -0,0 +1,88 @@
+'use client'
+
+import { useState } from 'react'
+import { useRouter, usePathname } from 'next/navigation'
+import { useLocale, useTranslations } from 'next-intl'
+import {
+  IconButton,
+  Menu,
+  MenuItem,
+  Box,
+  Typography,
+  ListItemIcon,
+} from '@mui/material'
+import { Language, Check } from '@mui/icons-material'
+
+const languages = [
+  { code: 'ro', name: 'Română', flag: '🇷🇴' },
+  { code: 'en', name: 'English', flag: '🇺🇸' },
+]
+
+export function LanguageSwitcher() {
+  const [anchorEl, setAnchorEl] = useState<null | HTMLElement>(null)
+  const router = useRouter()
+  const pathname = usePathname()
+  const locale = useLocale()
+  const t = useTranslations('navigation')
+
+  const handleOpen = (event: React.MouseEvent<HTMLElement>) => {
+    setAnchorEl(event.currentTarget)
+  }
+
+  const handleClose = () => {
+    setAnchorEl(null)
+  }
+
+  const handleLanguageChange = (newLocale: string) => {
+    // Remove current locale from pathname and add new one
+    const pathWithoutLocale = pathname.replace(`/${locale}`, '') || '/'
+    const newPath = `/${newLocale}${pathWithoutLocale === '/' ? '' : pathWithoutLocale}`
+
+    router.push(newPath)
+    handleClose()
+  }
+
+  const currentLanguage = languages.find(lang => lang.code === locale)
+
+  return (
+    <>
+      <IconButton
+        onClick={handleOpen}
+        sx={{ color: 'white' }}
+        aria-label={t('language')}
+      >
+        <Language />
+      </IconButton>
+
+      <Menu
+        anchorEl={anchorEl}
+        open={Boolean(anchorEl)}
+        onClose={handleClose}
+        transformOrigin={{ horizontal: 'right', vertical: 'top' }}
+        anchorOrigin={{ horizontal: 'right', vertical: 'bottom' }}
+      >
+        {languages.map((language) => (
+          <MenuItem
+            key={language.code}
+            onClick={() => handleLanguageChange(language.code)}
+            selected={language.code === locale}
+          >
+            <Box sx={{ display: 'flex', alignItems: 'center', gap: 1, minWidth: 120 }}>
+              <Typography component="span" sx={{ fontSize: '1.2rem' }}>
+                {language.flag}
+              </Typography>
+              <Typography sx={{ flexGrow: 1 }}>
+                {language.name}
+              </Typography>
+              {language.code === locale && (
+                <ListItemIcon sx={{ minWidth: 'auto' }}>
+                  <Check fontSize="small" />
+                </ListItemIcon>
+              )}
+            </Box>
+          </MenuItem>
+        ))}
+      </Menu>
+    </>
+  )
+}