Fix ESLint warnings for deployment

src/components/Layout.js

@@ -1,6 +1,6 @@
 import React, { useState, useEffect, useRef } from 'react';
 import { Link, useLocation } from 'react-router-dom';
-import { Home, Hash, FileText, FileSpreadsheet, Wand2, GitCompare, Menu, X, Database, LinkIcon, Code2, ChevronDown, Type, Edit3 } from 'lucide-react';
+import { Home, Hash, FileSpreadsheet, Wand2, GitCompare, Menu, X, LinkIcon, Code2, ChevronDown, Type, Edit3 } from 'lucide-react';
 import ThemeToggle from './ThemeToggle';
 import ToolSidebar from './ToolSidebar';
 

src/components/MindmapView.js

@@ -1,7 +1,5 @@
 import React, { useMemo, useCallback } from 'react';
 import ReactFlow, {
-  Node,
-  Edge,
   Controls,
   MiniMap,
   Background,
@@ -20,7 +18,6 @@ import {
   Type, 
   Hash, 
   ToggleLeft, 
-  Calendar,
   FileText,
   Zap,
   Copy,

src/components/ToolSidebar.js

@@ -1,6 +1,6 @@
 import React, { useState } from 'react';
 import { Link, useLocation } from 'react-router-dom';
-import { Search, FileText, Database, LinkIcon, Hash, FileSpreadsheet, Wand2, GitCompare, Home, ChevronLeft, ChevronRight, Type, Edit3 } from 'lucide-react';
+import { Search, LinkIcon, Hash, FileSpreadsheet, Wand2, GitCompare, Home, ChevronLeft, ChevronRight, Type, Edit3 } from 'lucide-react';
 
 const ToolSidebar = () => {
   const location = useLocation();