feat: add disclaimer modal, update lake data, and improve component interactions

src/App.tsx

@@ -7,6 +7,7 @@ import FavoritesOverview from './components/FavoritesOverview';
 import Sidebar from './components/Sidebar';
 import Topbar from './components/Topbar';
 import SettingsModal from './components/SettingsModal';
+import { DisclaimerModal } from './components/DisclaimerModal';
 import { type Language, t } from './translations';
 import { lakesConfig } from '../scripts/lakesConfig';
 import { slugify } from './utils/slugify';
@@ -58,6 +59,7 @@ function App() {
 
   return (
     <div className="dashboard-container">
+      <DisclaimerModal language={language} setLanguage={setLanguage} />
       {/* Mobile overlay */}
       {isMobileMenuOpen && (
         <div