feat: update water level metrics and optimize sidebar UI layout

src/App.tsx

@@ -1,5 +1,5 @@
 import { useState, useEffect } from 'react';
-import { Routes, Route, useParams, useLocation, useNavigate, Navigate } from 'react-router-dom';
+import { Routes, Route, useParams, Navigate } from 'react-router-dom';
 import LakeDetail from './components/LakeDetail';
 import LakesOverview from './components/LakesOverview';
 import LakeMap from './components/LakeMap';