Added files of the Todo app

.vscode/settings.json

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+{
+    "kiroAgent.configureMCP": "Disabled"
+}

Backend/middleware/auth.js

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+import jwt from 'jsonwebtoken';
+import User from '../models/User.js';
+
+export const authenticateToken = async (req, res, next) => {
+  const authHeader = req.headers['authorization'];
+  const token = authHeader && authHeader.split(' ')[1];
+
+  if (!token) {
+    return res.status(401).json({ message: 'Access token required' });
+  }
+
+  try {
+    const decoded = jwt.verify(token, process.env.JWT_SECRET);
+    const user = await User.findById(decoded.userId).select('-password');
+    
+    if (!user) {
+      return res.status(401).json({ message: 'Invalid token' });
+    }
+
+    req.user = user;
+    next();
+  } catch (error) {
+    return res.status(403).json({ message: 'Invalid or expired token' });
+  }
+};

Backend/models/Todo.js

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+import mongoose from 'mongoose';
+
+const todoSchema = new mongoose.Schema({
+  title: {
+    type: String,
+    required: true,
+    trim: true,
+    maxlength: 200
+  },
+  description: {
+    type: String,
+    trim: true,
+    maxlength: 1000
+  },
+  completed: {
+    type: Boolean,
+    default: false
+  },
+  priority: {
+    type: String,
+    enum: ['low', 'medium', 'high'],
+    default: 'medium'
+  },
+  dueDate: {
+    type: Date,
+    required: true
+  },
+  userId: {
+    type: mongoose.Schema.Types.ObjectId,
+    ref: 'User',
+    required: true
+  }
+}, {
+  timestamps: true
+});
+
+export default mongoose.model('Todo', todoSchema);

Backend/models/User.js

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+import mongoose from 'mongoose';
+import bcrypt from 'bcryptjs';
+
+const userSchema = new mongoose.Schema({
+  username: {
+    type: String,
+    required: true,
+    unique: true,
+    trim: true,
+    minlength: 3,
+    maxlength: 30
+  },
+  email: {
+    type: String,
+    required: true,
+    unique: true,
+    trim: true,
+    lowercase: true
+  },
+  password: {
+    type: String,
+    required: true,
+    minlength: 6
+  }
+}, {
+  timestamps: true
+});
+
+userSchema.pre('save', async function(next) {
+  if (!this.isModified('password')) return next();
+  
+  try {
+    const salt = await bcrypt.genSalt(10);
+    this.password = await bcrypt.hash(this.password, salt);
+    next();
+  } catch (error) {
+    next(error);
+  }
+});
+
+userSchema.methods.comparePassword = async function(candidatePassword) {
+  return bcrypt.compare(candidatePassword, this.password);
+};
+
+export default mongoose.model('User', userSchema);

Backend/package.json

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+{
+  "name": "todo-backend",
+  "version": "1.0.0",
+  "description": "Backend for Todo App with Authentication",
+  "main": "server.js",
+  "type": "module",
+  "scripts": {
+    "start": "node server.js",
+    "dev": "nodemon server.js",
+    "test-db": "node test-connection.js"
+  },
+  "dependencies": {
+    "express": "^4.18.2",
+    "mongoose": "^8.0.0",
+    "bcryptjs": "^2.4.3",
+    "jsonwebtoken": "^9.0.2",
+    "cors": "^2.8.5",
+    "dotenv": "^16.3.1"
+  },
+  "devDependencies": {
+    "nodemon": "^3.0.1"
+  }
+}

Backend/routes/auth.js

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+import express from 'express';
+import jwt from 'jsonwebtoken';
+import User from '../models/User.js';
+
+const router = express.Router();
+
+// Register
+router.post('/register', async (req, res) => {
+  try {
+    const { username, email, password } = req.body;
+
+    // Validation
+    if (!username || !email || !password) {
+      return res.status(400).json({
+        message: 'Username, email, and password are required'
+      });
+    }
+
+    if (password.length < 6) {
+      return res.status(400).json({
+        message: 'Password must be at least 6 characters long'
+      });
+    }
+
+    // Check if user already exists
+    const existingUser = await User.findOne({
+      $or: [{ email }, { username }]
+    });
+
+    if (existingUser) {
+      return res.status(400).json({
+        message: 'User with this email or username already exists'
+      });
+    }
+
+    // Create new user
+    const user = new User({ username, email, password });
+    await user.save();
+
+    // Generate JWT token
+    const token = jwt.sign(
+      { userId: user._id },
+      process.env.JWT_SECRET,
+      { expiresIn: '7d' }
+    );
+
+    res.status(201).json({
+      message: 'User created successfully',
+      token,
+      user: {
+        id: user._id,
+        username: user.username,
+        email: user.email
+      }
+    });
+  } catch (error) {
+    console.error('Registration error:', error);
+    res.status(500).json({ message: 'Server error', error: error.message });
+  }
+});
+
+// Login
+router.post('/login', async (req, res) => {
+  try {
+    const { email, password } = req.body;
+
+    // Find user by email
+    const user = await User.findOne({ email });
+    if (!user) {
+      return res.status(400).json({ message: 'Invalid credentials' });
+    }
+
+    // Check password
+    const isMatch = await user.comparePassword(password);
+    if (!isMatch) {
+      return res.status(400).json({ message: 'Invalid credentials' });
+    }
+
+    // Generate JWT token
+    const token = jwt.sign(
+      { userId: user._id },
+      process.env.JWT_SECRET,
+      { expiresIn: '7d' }
+    );
+
+    res.json({
+      message: 'Login successful',
+      token,
+      user: {
+        id: user._id,
+        username: user.username,
+        email: user.email
+      }
+    });
+  } catch (error) {
+    res.status(500).json({ message: 'Server error', error: error.message });
+  }
+});
+
+export default router;

Backend/routes/todos.js

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+import express from 'express';
+import Todo from '../models/Todo.js';
+
+const router = express.Router();
+
+// Get todos for a specific date
+router.get('/', async (req, res) => {
+  try {
+    const { date } = req.query;
+    let query = { userId: req.user._id };
+
+    if (date) {
+      const startDate = new Date(date);
+      const endDate = new Date(date);
+      endDate.setDate(endDate.getDate() + 1);
+      
+      query.dueDate = {
+        $gte: startDate,
+        $lt: endDate
+      };
+    }
+
+    const todos = await Todo.find(query).sort({ createdAt: -1 });
+    res.json(todos);
+  } catch (error) {
+    res.status(500).json({ message: 'Server error', error: error.message });
+  }
+});
+
+// Create new todo
+router.post('/', async (req, res) => {
+  try {
+    const { title, description, priority, dueDate } = req.body;
+
+    const todo = new Todo({
+      title,
+      description,
+      priority,
+      dueDate: new Date(dueDate),
+      userId: req.user._id
+    });
+
+    await todo.save();
+    res.status(201).json(todo);
+  } catch (error) {
+    res.status(500).json({ message: 'Server error', error: error.message });
+  }
+});
+
+// Update todo
+router.put('/:id', async (req, res) => {
+  try {
+    const { id } = req.params;
+    const updates = req.body;
+
+    const todo = await Todo.findOneAndUpdate(
+      { _id: id, userId: req.user._id },
+      updates,
+      { new: true }
+    );
+
+    if (!todo) {
+      return res.status(404).json({ message: 'Todo not found' });
+    }
+
+    res.json(todo);
+  } catch (error) {
+    res.status(500).json({ message: 'Server error', error: error.message });
+  }
+});
+
+// Delete todo
+router.delete('/:id', async (req, res) => {
+  try {
+    const { id } = req.params;
+
+    const todo = await Todo.findOneAndDelete({
+      _id: id,
+      userId: req.user._id
+    });
+
+    if (!todo) {
+      return res.status(404).json({ message: 'Todo not found' });
+    }
+
+    res.json({ message: 'Todo deleted successfully' });
+  } catch (error) {
+    res.status(500).json({ message: 'Server error', error: error.message });
+  }
+});
+
+export default router;

Backend/server.js

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+import express from 'express';
+import mongoose from 'mongoose';
+import cors from 'cors';
+import dotenv from 'dotenv';
+import authRoutes from './routes/auth.js';
+import todoRoutes from './routes/todos.js';
+import { authenticateToken } from './middleware/auth.js';
+
+dotenv.config();
+
+const app = express();
+const PORT = process.env.PORT || 5000;
+
+// Middleware
+app.use(cors());
+app.use(express.json());
+
+// Root route
+app.get('/', (req, res) => {
+  res.json({ message: 'Todo App Backend API is running!' });
+});
+
+// Routes
+app.use('/api/auth', authRoutes);
+app.use('/api/todos', authenticateToken, todoRoutes);
+
+// Error handling middleware
+app.use((err, req, res, next) => {
+  console.error('Error:', err);
+  res.status(500).json({ message: 'Internal server error', error: err.message });
+});
+
+// MongoDB connection
+mongoose.connect(process.env.MONGO_URL)
+  .then(() => {
+    console.log('✅ Connected to MongoDB');
+    console.log('Database:', process.env.MONGO_URL);
+  })
+  .catch((err) => {
+    console.error('❌ MongoDB connection error:', err.message);
+    console.log('Make sure MongoDB is running on your system');
+    process.exit(1);
+  });
+
+app.listen(PORT, () => {
+  console.log(`🚀 Server running on port ${PORT}`);
+  
+});

Frontend/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

Frontend/README.md

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+# React + Vite
+
+This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+
+Currently, two official plugins are available:
+
+- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Babel](https://babeljs.io/) (or [oxc](https://oxc.rs) when used in [rolldown-vite](https://vite.dev/guide/rolldown)) for Fast Refresh
+- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
+
+## React Compiler
+
+The React Compiler is not enabled on this template because of its impact on dev & build performances. To add it, see [this documentation](https://react.dev/learn/react-compiler/installation).
+
+## Expanding the ESLint configuration
+
+If you are developing a production application, we recommend using TypeScript with type-aware lint rules enabled. Check out the [TS template](https://github.com/vitejs/vite/tree/main/packages/create-vite/template-react-ts) for information on how to integrate TypeScript and [`typescript-eslint`](https://typescript-eslint.io) in your project.

Frontend/eslint.config.js

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+import js from '@eslint/js'
+import globals from 'globals'
+import reactHooks from 'eslint-plugin-react-hooks'
+import reactRefresh from 'eslint-plugin-react-refresh'
+import { defineConfig, globalIgnores } from 'eslint/config'
+
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{js,jsx}'],
+    extends: [
+      js.configs.recommended,
+      reactHooks.configs.flat.recommended,
+      reactRefresh.configs.vite,
+    ],
+    languageOptions: {
+      ecmaVersion: 2020,
+      globals: globals.browser,
+      parserOptions: {
+        ecmaVersion: 'latest',
+        ecmaFeatures: { jsx: true },
+        sourceType: 'module',
+      },
+    },
+    rules: {
+      'no-unused-vars': ['error', { varsIgnorePattern: '^[A-Z_]' }],
+    },
+  },
+])

Frontend/index.html

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+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>vite-project</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.jsx"></script>
+  </body>
+</html>

Frontend/package.json

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+{
+  "name": "vite-project",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "lint": "eslint .",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@tailwindcss/vite": "^4.1.18",
+    "axios": "^1.10.0",
+    "react": "^19.2.0",
+    "react-dom": "^19.2.0",
+    "react-router-dom": "^7.1.1"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.39.1",
+    "@types/react": "^19.2.5",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^5.1.1",
+    "autoprefixer": "^10.4.23",
+    "eslint": "^9.39.1",
+    "eslint-plugin-react-hooks": "^7.0.1",
+    "eslint-plugin-react-refresh": "^0.4.24",
+    "globals": "^16.5.0",
+    "postcss": "^8.5.6",
+    "tailwindcss": "^4.1.18",
+    "vite": "^7.2.4"
+  }
+}

Frontend/public/vite.svg

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+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="31.88" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 257"><defs><linearGradient id="IconifyId1813088fe1fbc01fb466" x1="-.828%" x2="57.636%" y1="7.652%" y2="78.411%"><stop offset="0%" stop-color="#41D1FF"></stop><stop offset="100%" stop-color="#BD34FE"></stop></linearGradient><linearGradient id="IconifyId1813088fe1fbc01fb467" x1="43.376%" x2="50.316%" y1="2.242%" y2="89.03%"><stop offset="0%" stop-color="#FFEA83"></stop><stop offset="8.333%" stop-color="#FFDD35"></stop><stop offset="100%" stop-color="#FFA800"></stop></linearGradient></defs><path fill="url(#IconifyId1813088fe1fbc01fb466)" d="M255.153 37.938L134.897 252.976c-2.483 4.44-8.862 4.466-11.382.048L.875 37.958c-2.746-4.814 1.371-10.646 6.827-9.67l120.385 21.517a6.537 6.537 0 0 0 2.322-.004l117.867-21.483c5.438-.991 9.574 4.796 6.877 9.62Z"></path><path fill="url(#IconifyId1813088fe1fbc01fb467)" d="M185.432.063L96.44 17.501a3.268 3.268 0 0 0-2.634 3.014l-5.474 92.456a3.268 3.268 0 0 0 3.997 3.378l24.777-5.718c2.318-.535 4.413 1.507 3.936 3.838l-7.361 36.047c-.495 2.426 1.782 4.5 4.151 3.78l15.304-4.649c2.372-.72 4.652 1.36 4.15 3.788l-11.698 56.621c-.732 3.542 3.979 5.473 5.943 2.437l1.313-2.028l72.516-144.72c1.215-2.423-.88-5.186-3.54-4.672l-25.505 4.922c-2.396.462-4.435-1.77-3.759-4.114l16.646-57.705c.677-2.35-1.37-4.583-3.769-4.113Z"></path></svg>

Frontend/src/App.css

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+@import "tailwindcss";

Frontend/src/App.jsx

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+import './App.css';
+import { Routes, Route, Navigate } from 'react-router-dom';
+import { useAuth } from './context/AuthContext';
+import AuthPage from './pages/AuthPage';
+import TodoDashboard from './pages/TodoDashboard';
+
+function App() {
+  const { user, loading } = useAuth();
+
+  if (loading) {
+    return (
+      <div className="min-h-screen flex items-center justify-center">
+        <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-blue-500"></div>
+      </div>
+    );
+  }
+
+  return (
+    <Routes>
+      <Route 
+        path="/" 
+        element={user ? <Navigate to="/dashboard" replace /> : <AuthPage />} 
+      />
+      <Route 
+        path="/dashboard" 
+        element={user ? <TodoDashboard /> : <Navigate to="/" replace />} 
+      />
+    </Routes>
+  );
+}
+
+export default App;

Frontend/src/assets/react.svg

@@ -0,0 +1 @@
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Frontend/src/components/Auth/Login.jsx

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+import { useState } from 'react';
+import { useAuth } from '../../context/AuthContext';
+
+function Login() {
+  const [email, setEmail] = useState('');
+  const [password, setPassword] = useState('');
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState('');
+  const { login } = useAuth();
+  
+  const handleLogin = async (e) => {
+    e.preventDefault();
+    setLoading(true);
+    setError('');
+    
+    const result = await login(email, password);
+    
+    if (!result.success) {
+      setError(result.message);
+    }
+    
+    setLoading(false);
+  };
+
+
+  return (
+    <form onSubmit={handleLogin} className="flex flex-col gap-6">
+      <h2 className="text-2xl font-semibold text-center h-[50px]">Login</h2>
+      {error && (
+        <div className="text-red-500 text-center text-sm">{error}</div>
+      )}
+      <input
+        type="email"  
+        className="w-full px-4 py-4 border rounded-md bg-transparent text-inherit border-gray-300 dark:border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 text-lg"
+        placeholder="Email"
+        value={email}
+        onChange={e => setEmail(e.target.value)}
+        required
+      />
+      <input
+        type="password"
+        className="w-full px-4 py-4 border rounded-md bg-transparent text-inherit border-gray-300 dark:border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 text-lg"
+        placeholder="Password"
+        value={password}
+        onChange={e => setPassword(e.target.value)}
+        required
+      />
+      <button
+        type="submit"
+        disabled={loading}
+        className="w-full px-4 py-2 border rounded-md bg-blue-500 text-white border-blue-500 hover:bg-blue-600 focus:outline-none focus:ring-2 focus:ring-blue-500 disabled:opacity-50"
+      >
+        {loading ? 'Logging in...' : 'Login'}
+      </button>
+    </form>
+  );
+}
+
+export default Login;

Frontend/src/components/Auth/Register.jsx

@@ -0,0 +1,68 @@
+import { useState } from 'react';
+import { useAuth } from '../../context/AuthContext';
+
+function Register() {
+  const [username, setUsername] = useState('');
+  const [email, setEmail] = useState('');
+  const [password, setPassword] = useState('');
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState('');
+  const { register } = useAuth();
+
+  const handleRegister = async (e) => {
+    e.preventDefault();
+    setLoading(true);
+    setError('');
+    
+    const result = await register(username, email, password);
+    
+    if (!result.success) {
+      setError(result.message);
+    }
+    
+    setLoading(false);
+  };
+
+
+  return (
+    <form onSubmit={handleRegister} className="flex flex-col gap-6">
+      <h2 className="text-2xl font-semibold text-center h-[50px]">Register</h2>
+      {error && (
+        <div className="text-red-500 text-center text-sm">{error}</div>
+      )}
+      <input
+        type="text"
+        className="w-full px-4 py-4 border rounded-md bg-transparent text-inherit border-gray-300 dark:border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 text-lg" 
+        placeholder="Name"
+        value={username}
+        onChange={e => setUsername(e.target.value)}
+        required
+      />
+      <input
+        type="email"
+        className="w-full px-4 py-4 border rounded-md bg-transparent text-inherit border-gray-300 dark:border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 text-lg" 
+        placeholder="Email"
+        value={email}
+        onChange={e => setEmail(e.target.value)}
+        required
+      />
+      <input
+        type="password"
+        className="w-full px-4 py-4 border rounded-md bg-transparent text-inherit border-gray-300 dark:border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 text-lg" 
+        placeholder="Password"
+        value={password}
+        onChange={e => setPassword(e.target.value)}
+        required
+      />
+      <button
+        type="submit"
+        disabled={loading}
+        className="w-full px-4 py-2 border rounded-md bg-green-500 text-white border-green-500 hover:bg-green-600 focus:outline-none focus:ring-2 focus:ring-green-500 disabled:opacity-50"
+      >
+        {loading ? 'Registering...' : 'Register'}
+      </button>
+    </form>
+  );
+}
+
+export default Register;

Frontend/src/components/Calendar/Calendar.jsx

@@ -0,0 +1,117 @@
+import { useState } from 'react';
+
+function Calendar({ selectedDate, onDateSelect }) {
+  const [currentMonth, setCurrentMonth] = useState(new Date(selectedDate));
+
+  const monthNames = [
+    'January', 'February', 'March', 'April', 'May', 'June',
+    'July', 'August', 'September', 'October', 'November', 'December'
+  ];
+
+  const daysOfWeek = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
+
+  const getDaysInMonth = (date) => {
+    const year = date.getFullYear();
+    const month = date.getMonth();
+    const firstDay = new Date(year, month, 1);
+    const lastDay = new Date(year, month + 1, 0);
+    const daysInMonth = lastDay.getDate();
+    const startingDayOfWeek = firstDay.getDay();
+
+    const days = [];
+
+    // Add empty cells for days before the first day of the month
+    for (let i = 0; i < startingDayOfWeek; i++) {
+      days.push(null);
+    }
+
+    // Add days of the month
+    for (let day = 1; day <= daysInMonth; day++) {
+      days.push(new Date(year, month, day));
+    }
+
+    return days;
+  };
+
+  const navigateMonth = (direction) => {
+    const newMonth = new Date(currentMonth);
+    newMonth.setMonth(currentMonth.getMonth() + direction);
+    setCurrentMonth(newMonth);
+  };
+
+  const isToday = (date) => {
+    const today = new Date();
+    return date && 
+           date.getDate() === today.getDate() &&
+           date.getMonth() === today.getMonth() &&
+           date.getFullYear() === today.getFullYear();
+  };
+
+  const isSelected = (date) => {
+    return date &&
+           date.getDate() === selectedDate.getDate() &&
+           date.getMonth() === selectedDate.getMonth() &&
+           date.getFullYear() === selectedDate.getFullYear();
+  };
+
+  const days = getDaysInMonth(currentMonth);
+
+  return (
+    <div className="w-full">
+      {/* Month Navigation */}
+      <div className="flex justify-between items-center mb-4">
+        <button
+          onClick={() => navigateMonth(-1)}
+          className="p-1 hover:bg-gray-100 rounded"
+        >
+          <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 19l-7-7 7-7" />
+          </svg>
+        </button>
+        <h3 className="text-lg font-semibold">
+          {monthNames[currentMonth.getMonth()]} {currentMonth.getFullYear()}
+        </h3>
+        <button
+          onClick={() => navigateMonth(1)}
+          className="p-1 hover:bg-gray-100 rounded"
+        >
+          <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 5l7 7-7 7" />
+          </svg>
+        </button>
+      </div>
+
+      {/* Days of Week Header */}
+      <div className="grid grid-cols-7 gap-1 mb-2">
+        {daysOfWeek.map(day => (
+          <div key={day} className="text-center text-xs font-medium text-gray-500 py-2">
+            {day}
+          </div>
+        ))}
+      </div>
+
+      {/* Calendar Grid */}
+      <div className="grid grid-cols-7 gap-1">
+        {days.map((date, index) => (
+          <button
+            key={index}
+            onClick={() => date && onDateSelect(date)}
+            disabled={!date}
+            className={`
+              aspect-square flex items-center justify-center text-sm rounded
+              ${!date ? 'invisible' : ''}
+              ${isToday(date) ? 'bg-blue-100 text-blue-800 font-semibold' : ''}
+              ${isSelected(date) ? 'bg-blue-500 text-white' : ''}
+              ${date && !isSelected(date) && !isToday(date) ? 'hover:bg-gray-100' : ''}
+              transition-colors
+            `}
+          >
+            {date?.getDate()}
+          </button>
+        ))}
+      </div>
+    </div>
+  );
+}
+
+export default Calendar;

Frontend/src/components/Todo/TodoForm.jsx

@@ -0,0 +1,116 @@
+import { useState } from 'react';
+
+function TodoForm({ onSubmit, onClose, selectedDate }) {
+  const [title, setTitle] = useState('');
+  const [description, setDescription] = useState('');
+  const [priority, setPriority] = useState('medium');
+  const [loading, setLoading] = useState(false);
+
+  const handleSubmit = async (e) => {
+    e.preventDefault();
+    if (!title.trim()) return;
+
+    setLoading(true);
+    await onSubmit({
+      title: title.trim(),
+      description: description.trim(),
+      priority
+    });
+    setLoading(false);
+  };
+
+  const formatDate = (date) => {
+    return date.toLocaleDateString('en-US', {
+      weekday: 'long',
+      year: 'numeric',
+      month: 'long',
+      day: 'numeric'
+    });
+  };
+
+  return (
+    <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center p-4 z-50">
+      <div className="bg-white rounded-lg shadow-xl w-full max-w-md">
+        <div className="px-6 py-4 border-b border-gray-200">
+          <div className="flex justify-between items-center">
+            <h3 className="text-lg font-semibold text-gray-900">Add New Task</h3>
+            <button
+              onClick={onClose}
+              className="text-gray-400 hover:text-gray-600 transition-colors"
+            >
+              <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
+              </svg>
+            </button>
+          </div>
+          <p className="text-sm text-gray-600 mt-1">
+            For {formatDate(selectedDate)}
+          </p>
+        </div>
+
+        <form onSubmit={handleSubmit} className="p-6 space-y-4">
+          <div>
+            <label className="block text-sm font-medium text-gray-700 mb-2">
+              Task Title *
+            </label>
+            <input
+              type="text"
+              value={title}
+              onChange={(e) => setTitle(e.target.value)}
+              className="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent"
+              placeholder="Enter task title"
+              required
+            />
+          </div>
+
+          <div>
+            <label className="block text-sm font-medium text-gray-700 mb-2">
+              Description
+            </label>
+            <textarea
+              value={description}
+              onChange={(e) => setDescription(e.target.value)}
+              className="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent"
+              placeholder="Enter task description (optional)"
+              rows="3"
+            />
+          </div>
+
+          <div>
+            <label className="block text-sm font-medium text-gray-700 mb-2">
+              Priority
+            </label>
+            <select
+              value={priority}
+              onChange={(e) => setPriority(e.target.value)}
+              className="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent"
+            >
+              <option value="low">Low Priority</option>
+              <option value="medium">Medium Priority</option>
+              <option value="high">High Priority</option>
+            </select>
+          </div>
+
+          <div className="flex gap-3 pt-4">
+            <button
+              type="submit"
+              disabled={loading || !title.trim()}
+              className="flex-1 bg-blue-500 hover:bg-blue-600 text-white py-2 px-4 rounded-md transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
+            >
+              {loading ? 'Adding...' : 'Add Task'}
+            </button>
+            <button
+              type="button"
+              onClick={onClose}
+              className="flex-1 bg-gray-300 hover:bg-gray-400 text-gray-700 py-2 px-4 rounded-md transition-colors"
+            >
+              Cancel
+            </button>
+          </div>
+        </form>
+      </div>
+    </div>
+  );
+}
+
+export default TodoForm;

Frontend/src/components/Todo/TodoItem.jsx

@@ -0,0 +1,149 @@
+import { useState } from 'react';
+
+function TodoItem({ todo, onUpdate, onDelete }) {
+  const [isEditing, setIsEditing] = useState(false);
+  const [editTitle, setEditTitle] = useState(todo.title);
+  const [editDescription, setEditDescription] = useState(todo.description || '');
+  const [editPriority, setEditPriority] = useState(todo.priority);
+
+  const priorityColors = {
+    low: 'bg-green-100 text-green-800 border-green-200',
+    medium: 'bg-yellow-100 text-yellow-800 border-yellow-200',
+    high: 'bg-red-100 text-red-800 border-red-200'
+  };
+
+  const handleToggleComplete = () => {
+    onUpdate(todo._id, { completed: !todo.completed });
+  };
+
+  const handleSaveEdit = () => {
+    onUpdate(todo._id, {
+      title: editTitle,
+      description: editDescription,
+      priority: editPriority
+    });
+    setIsEditing(false);
+  };
+
+  const handleCancelEdit = () => {
+    setEditTitle(todo.title);
+    setEditDescription(todo.description || '');
+    setEditPriority(todo.priority);
+    setIsEditing(false);
+  };
+
+  if (isEditing) {
+    return (
+      <div className="bg-white border border-gray-200 rounded-lg p-4 shadow-sm">
+        <div className="space-y-3">
+          <input
+            type="text"
+            value={editTitle}
+            onChange={(e) => setEditTitle(e.target.value)}
+            className="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500"
+            placeholder="Task title"
+          />
+          <textarea
+            value={editDescription}
+            onChange={(e) => setEditDescription(e.target.value)}
+            className="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500"
+            placeholder="Task description (optional)"
+            rows="2"
+          />
+          <select
+            value={editPriority}
+            onChange={(e) => setEditPriority(e.target.value)}
+            className="px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500"
+          >
+            <option value="low">Low Priority</option>
+            <option value="medium">Medium Priority</option>
+            <option value="high">High Priority</option>
+          </select>
+          <div className="flex gap-2">
+            <button
+              onClick={handleSaveEdit}
+              className="bg-green-500 hover:bg-green-600 text-white px-3 py-1 rounded text-sm transition-colors"
+            >
+              Save
+            </button>
+            <button
+              onClick={handleCancelEdit}
+              className="bg-gray-500 hover:bg-gray-600 text-white px-3 py-1 rounded text-sm transition-colors"
+            >
+              Cancel
+            </button>
+          </div>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className={`bg-white border border-gray-200 rounded-lg p-4 shadow-sm transition-all ${
+      todo.completed ? 'opacity-75' : ''
+    }`}>
+      <div className="flex items-start gap-3">
+        {/* Checkbox */}
+        <button
+          onClick={handleToggleComplete}
+          className={`mt-1 w-5 h-5 rounded border-2 flex items-center justify-center transition-colors ${
+            todo.completed
+              ? 'bg-green-500 border-green-500 text-white'
+              : 'border-gray-300 hover:border-green-400'
+          }`}
+        >
+          {todo.completed && (
+            <svg className="w-3 h-3" fill="currentColor" viewBox="0 0 20 20">
+              <path fillRule="evenodd" d="M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z" clipRule="evenodd" />
+            </svg>
+          )}
+        </button>
+
+        {/* Content */}
+        <div className="flex-1 min-w-0">
+          <div className="flex items-start justify-between">
+            <div className="flex-1">
+              <h4 className={`text-lg font-medium ${
+                todo.completed ? 'line-through text-gray-500' : 'text-gray-900'
+              }`}>
+                {todo.title}
+              </h4>
+              {todo.description && (
+                <p className={`mt-1 text-sm ${
+                  todo.completed ? 'line-through text-gray-400' : 'text-gray-600'
+                }`}>
+                  {todo.description}
+                </p>
+              )}
+            </div>
+
+            {/* Priority Badge */}
+            <span className={`ml-2 px-2 py-1 text-xs font-medium rounded-full border ${
+              priorityColors[todo.priority]
+            }`}>
+              {todo.priority.charAt(0).toUpperCase() + todo.priority.slice(1)}
+            </span>
+          </div>
+
+          {/* Actions */}
+          <div className="flex gap-2 mt-3">
+            <button
+              onClick={() => setIsEditing(true)}
+              className="text-blue-600 hover:text-blue-800 text-sm font-medium transition-colors"
+            >
+              Edit
+            </button>
+            <button
+              onClick={() => onDelete(todo._id)}
+              className="text-red-600 hover:text-red-800 text-sm font-medium transition-colors"
+            >
+              Delete
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+export default TodoItem;

Frontend/src/components/Todo/TodoList.jsx

@@ -0,0 +1,64 @@
+import TodoItem from './TodoItem';
+
+function TodoList({ todos, onUpdate, onDelete }) {
+  if (todos.length === 0) {
+    return (
+      <div className="text-center py-12">
+        <div className="text-gray-400 mb-4">
+          <svg className="w-16 h-16 mx-auto" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={1} d="M9 5H7a2 2 0 00-2 2v10a2 2 0 002 2h8a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2" />
+          </svg>
+        </div>
+        <h3 className="text-lg font-medium text-gray-900 mb-2">No tasks for this date</h3>
+        <p className="text-gray-600">Click "Add Task" to create your first task for this day.</p>
+      </div>
+    );
+  }
+
+  const completedTodos = todos.filter(todo => todo.completed);
+  const pendingTodos = todos.filter(todo => !todo.completed);
+
+  return (
+    <div className="space-y-6">
+      {/* Pending Tasks */}
+      {pendingTodos.length > 0 && (
+        <div>
+          <h3 className="text-lg font-medium text-gray-900 mb-3">
+            Pending Tasks ({pendingTodos.length})
+          </h3>
+          <div className="space-y-2">
+            {pendingTodos.map(todo => (
+              <TodoItem
+                key={todo._id}
+                todo={todo}
+                onUpdate={onUpdate}
+                onDelete={onDelete}
+              />
+            ))}
+          </div>
+        </div>
+      )}
+
+      {/* Completed Tasks */}
+      {completedTodos.length > 0 && (
+        <div>
+          <h3 className="text-lg font-medium text-gray-500 mb-3">
+            Completed Tasks ({completedTodos.length})
+          </h3>
+          <div className="space-y-2">
+            {completedTodos.map(todo => (
+              <TodoItem
+                key={todo._id}
+                todo={todo}
+                onUpdate={onUpdate}
+                onDelete={onDelete}
+              />
+            ))}
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}
+
+export default TodoList;

Frontend/src/context/AuthContext.jsx

@@ -0,0 +1,99 @@
+import React, { createContext, useContext, useState, useEffect } from 'react';
+import axios from 'axios';
+
+const AuthContext = createContext();
+
+export const useAuth = () => {
+  const context = useContext(AuthContext);
+  if (!context) {
+    throw new Error('useAuth must be used within an AuthProvider');
+  }
+  return context;
+};
+
+export const AuthProvider = ({ children }) => {
+  const [user, setUser] = useState(null);
+  const [loading, setLoading] = useState(true);
+
+  const API_URL = 'http://localhost:5000/api';
+
+  useEffect(() => {
+    const token = localStorage.getItem('token');
+    if (token) {
+      axios.defaults.headers.common['Authorization'] = `Bearer ${token}`;
+      const userData = localStorage.getItem('user');
+      if (userData) {
+        setUser(JSON.parse(userData));
+      }
+    }
+    setLoading(false);
+  }, []);
+
+  const login = async (email, password) => {
+    try {
+      const response = await axios.post(`${API_URL}/auth/login`, {
+        email,
+        password
+      });
+
+      const { token, user } = response.data;
+      
+      localStorage.setItem('token', token);
+      localStorage.setItem('user', JSON.stringify(user));
+      axios.defaults.headers.common['Authorization'] = `Bearer ${token}`;
+      
+      setUser(user);
+      return { success: true };
+    } catch (error) {
+      return {
+        success: false,
+        message: error.response?.data?.message || 'Login failed'
+      };
+    }
+  };
+
+  const register = async (username, email, password) => {
+    try {
+      const response = await axios.post(`${API_URL}/auth/register`, {
+        username,
+        email,
+        password
+      });
+
+      const { token, user } = response.data;
+      
+      localStorage.setItem('token', token);
+      localStorage.setItem('user', JSON.stringify(user));
+      axios.defaults.headers.common['Authorization'] = `Bearer ${token}`;
+      
+      setUser(user);
+      return { success: true };
+    } catch (error) {
+      return {
+        success: false,
+        message: error.response?.data?.message || 'Registration failed'
+      };
+    }
+  };
+
+  const logout = () => {
+    localStorage.removeItem('token');
+    localStorage.removeItem('user');
+    delete axios.defaults.headers.common['Authorization'];
+    setUser(null);
+  };
+
+  const value = {
+    user,
+    login,
+    register,
+    logout,
+    loading
+  };
+
+  return (
+    <AuthContext.Provider value={value}>
+      {children}
+    </AuthContext.Provider>
+  );
+};

Frontend/src/index.css

@@ -0,0 +1 @@
+@import "tailwindcss";

Frontend/src/main.jsx

@@ -0,0 +1,16 @@
+import React from 'react';
+import ReactDOM from 'react-dom/client';
+import { BrowserRouter } from 'react-router-dom';
+import { AuthProvider } from './context/AuthContext';
+import App from './App';
+import './index.css';
+
+ReactDOM.createRoot(document.getElementById('root')).render(
+  <React.StrictMode>
+    <BrowserRouter>
+      <AuthProvider>
+        <App />
+      </AuthProvider>
+    </BrowserRouter>
+  </React.StrictMode>
+);

Frontend/src/pages/AuthPage.jsx

@@ -0,0 +1,52 @@
+import { useEffect, useState } from 'react';
+import Login from '../components/Auth/Login';
+import Register from '../components/Auth/Register';
+
+function AuthPage() {
+  const [isLogin, setIsLogin] = useState(true);
+  const [darkMode, setDarkMode] = useState(false);
+
+  useEffect(() => {
+    const root = window.document.documentElement;
+    if (darkMode) {
+      root.classList.add('dark');
+    } else {
+      root.classList.remove('dark');
+    }
+  }, [darkMode]);
+
+  return (
+    
+    <div className={`min-h-screen transition-colors duration-500 bg-gradient-to-br ${darkMode ? 'from-gray-900 to-gray-800' : 'from-blue-100 via-white to-blue-200'}`}>
+  
+      <div className="absolute top-4 right-4">
+        <button
+          onClick={() => setDarkMode(!darkMode)}
+          className="bg-gray-200 dark:bg-gray-700 text-gray-800 dark:text-gray-100 px-4 py-1 rounded shadow hover:bg-gray-300 dark:hover:bg-gray-600"
+        >
+          {darkMode ? '☀️ Light' : '🌙 Dark'}
+        </button>
+      </div>
+
+      <div className="flex items-center justify-center min-h-screen">
+        <div className={`shadow-2xl rounded-xl p-8 w-full max-w-xl min-h-[300px] border transition-all
+          ${darkMode ? 'bg-gray-800 border-gray-700 text-white' : 'bg-white border-gray-200 text-gray-800'}`}>
+
+
+          {isLogin ? <Login /> : <Register />}
+          <button
+            onClick={() => setIsLogin(!isLogin)}
+            className="mt-4 text-blue-600 dark:text-blue-300px hover:underline"
+          >
+            {isLogin ? 'Switch to Register' : 'Switch to Login'}
+          </button>
+          
+          
+          
+        </div>
+      </div>
+    </div>
+  );
+}
+
+export default AuthPage;

Frontend/src/pages/TodoDashboard.jsx

@@ -0,0 +1,164 @@
+import { useState, useEffect } from 'react';
+import { useAuth } from '../context/AuthContext';
+import Calendar from '../components/Calendar/Calendar';
+import TodoList from '../components/Todo/TodoList';
+import TodoForm from '../components/Todo/TodoForm';
+import axios from 'axios';
+
+function TodoDashboard() {
+  const { user, logout } = useAuth();
+  const [selectedDate, setSelectedDate] = useState(new Date());
+  const [todos, setTodos] = useState([]);
+  const [showForm, setShowForm] = useState(false);
+  const [loading, setLoading] = useState(false);
+
+  const API_URL = 'http://localhost:5000/api';
+
+  useEffect(() => {
+    fetchTodos();
+  }, [selectedDate]);
+
+  const fetchTodos = async () => {
+    setLoading(true);
+    try {
+      const dateStr = selectedDate.toISOString().split('T')[0];
+      const response = await axios.get(`${API_URL}/todos?date=${dateStr}`);
+      setTodos(response.data);
+    } catch (error) {
+      console.error('Error fetching todos:', error);
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const handleAddTodo = async (todoData) => {
+    try {
+      const response = await axios.post(`${API_URL}/todos`, {
+        ...todoData,
+        dueDate: selectedDate.toISOString()
+      });
+      setTodos([response.data, ...todos]);
+      setShowForm(false);
+    } catch (error) {
+      console.error('Error adding todo:', error);
+    }
+  };
+
+  const handleUpdateTodo = async (id, updates) => {
+    try {
+      const response = await axios.put(`${API_URL}/todos/${id}`, updates);
+      setTodos(todos.map(todo => 
+        todo._id === id ? response.data : todo
+      ));
+    } catch (error) {
+      console.error('Error updating todo:', error);
+    }
+  };
+
+  const handleDeleteTodo = async (id) => {
+    try {
+      await axios.delete(`${API_URL}/todos/${id}`);
+      setTodos(todos.filter(todo => todo._id !== id));
+    } catch (error) {
+      console.error('Error deleting todo:', error);
+    }
+  };
+
+  const formatDate = (date) => {
+    return date.toLocaleDateString('en-US', {
+      weekday: 'long',
+      year: 'numeric',
+      month: 'long',
+      day: 'numeric'
+    });
+  };
+
+  return (
+    <div className="min-h-screen bg-gray-50">
+      {/* Header */}
+      <header className="bg-white shadow-sm border-b">
+        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
+          <div className="flex justify-between items-center h-16">
+            <div className="flex items-center">
+              <h1 className="text-2xl font-bold text-gray-900">Todo Dashboard</h1>
+              <span className="ml-4 text-gray-600">Welcome, {user?.username}!</span>
+            </div>
+            <button
+              onClick={logout}
+              className="bg-red-500 hover:bg-red-600 text-white px-4 py-2 rounded-md transition-colors"
+            >
+              Logout
+            </button>
+          </div>
+        </div>
+      </header>
+
+      <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
+        <div className="grid grid-cols-1 lg:grid-cols-4 gap-8">
+          {/* Calendar Sidebar */}
+          <div className="lg:col-span-1">
+            <div className="bg-white rounded-lg shadow p-6">
+              <h2 className="text-lg font-semibold text-gray-900 mb-4">Calendar</h2>
+              <Calendar
+                selectedDate={selectedDate}
+                onDateSelect={setSelectedDate}
+              />
+            </div>
+          </div>
+
+          {/* Main Todo Area */}
+          <div className="lg:col-span-3">
+            <div className="bg-white rounded-lg shadow">
+              {/* Todo Header */}
+              <div className="px-6 py-4 border-b border-gray-200">
+                <div className="flex justify-between items-center">
+                  <div>
+                    <h2 className="text-xl font-semibold text-gray-900">
+                      Tasks for {formatDate(selectedDate)}
+                    </h2>
+                    <p className="text-gray-600 mt-1">
+                      {todos.length} {todos.length === 1 ? 'task' : 'tasks'}
+                    </p>
+                  </div>
+                  <button
+                    onClick={() => setShowForm(true)}
+                    className="bg-blue-500 hover:bg-blue-600 text-white px-4 py-2 rounded-md transition-colors"
+                  >
+                    Add Task
+                  </button>
+                </div>
+              </div>
+
+              {/* Todo Content */}
+              <div className="p-6">
+                {loading ? (
+                  <div className="text-center py-8">
+                    <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-blue-500 mx-auto"></div>
+                    <p className="text-gray-600 mt-2">Loading tasks...</p>
+                  </div>
+                ) : (
+                  <TodoList
+                    todos={todos}
+                    onUpdate={handleUpdateTodo}
+                    onDelete={handleDeleteTodo}
+                  />
+                )}
+              </div>
+            </div>
+          </div>
+        </div>
+      </div>
+
+      {/* Todo Form Modal */}
+      {showForm && (
+        <TodoForm
+          onSubmit={handleAddTodo}
+          onClose={() => setShowForm(false)}
+          selectedDate={selectedDate}
+        />
+      )}
+    </div>
+  );
+}
+
+export default TodoDashboard;

Frontend/vite.config.js

@@ -0,0 +1,10 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+import tailwindcss from '@tailwindcss/vite'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react()
+    , tailwindcss()
+  ],
+})