feat: import new reservoir data, add lake management scripts, and update overview UI components

scripts/fetch_lakes_temp.ts

@@ -0,0 +1,33 @@
+import axios from 'axios';
+import * as cheerio from 'cheerio';
+import https from 'https';
+
+async function fetchLakes() {
+  const agent = new https.Agent({ rejectUnauthorized: false });
+  try {
+    const response = await axios.get('https://www.pvl.cz/portal/nadrze/cz/pc/Prehled.aspx', {
+      httpsAgent: agent,
+      headers: {
+        'User-Agent': 'Mozilla/5.0'
+      }
+    });
+
+    const $ = cheerio.load(response.data);
+    const lakes: any[] = [];
+    
+    // Links to lakes usually look like Mereni.aspx?oid=xxx&id=yyy
+    $('a[href^="Mereni.aspx"]').each((i, el) => {
+      const href = $(el).attr('href');
+      const text = $(el).text().trim();
+      if (href && text) {
+        lakes.push({ href, text });
+      }
+    });
+
+    console.log(JSON.stringify(lakes, null, 2));
+  } catch (err: any) {
+    console.error('Error:', err.message);
+  }
+}
+
+fetchLakes();