refactor: remplacer Landing v1 par v2 + ajout blague disponibilité

- Suppression de l'ancien Landing.tsx (v1)
- Renommage de Landing.v2.tsx en Landing.tsx
- Ajout tooltip humoristique sur la stat "99% Disponibilité"
  (*Quand Enedis n'est pas en vacances 🏖️

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

Co-Authored-By: Claude <[email protected]>
EOF
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Author: Clément VALENTIN

apps/web/src/App.tsx

@@ -2,7 +2,7 @@ import { Routes, Route, Navigate } from 'react-router-dom'
 import { useAuth } from './hooks/useAuth'
 import Layout from './components/Layout'
 import PermissionRoute from './components/PermissionRoute'
-import Landing from './pages/Landing.v2'
+import Landing from './pages/Landing'
 import Login from './pages/Login'
 import Signup from './pages/Signup'
 import Dashboard from './pages/Dashboard'