Fix code quality issues: remove unused imports, fix ESLint errors, and update dependencies

[Copilot]

Summary

This PR addresses several code quality issues found during a comprehensive code review of the maxfra beauty academy management application. The changes improve code maintainability, reduce bundle size, and enhance overall code quality without affecting functionality.

Issues Fixed

ESLint Errors Resolved

• Removed 18 unused Lucide React icon imports from App.tsx that were cluttering the codebase and unnecessarily increasing bundle size
• Fixed unused variable slotIndex in CalendarSection.tsx by removing the unused parameter
• Fixed switch statement scope issues in Sidebar.tsx by adding proper block scoping to case statements to prevent lexical declaration errors

Security and Dependencies

• Updated vulnerable packages via npm audit fix (reduced from 7 to 5 vulnerabilities)
• Updated browserslist database to latest version
• Remaining 5 vulnerabilities are in development dependencies and would require breaking changes to resolve

Code Quality Improvements

Before

// App.tsx - 18 unused imports
import { Calendar, Users, FileText, BarChart3, Clock, MapPin, User, BookOpen, CheckCircle, Plus, Search, Filter, Bell, Upload, Download, Eye, Settings, LogOut } from 'lucide-react';

// CalendarSection.tsx - unused parameter
{slots.map((slot, slotIndex) => (

// Sidebar.tsx - lexical declaration errors
case 'diploma':
  const studentName = prompt('Enter student name for diploma:');

After

// App.tsx - clean imports
import React, { useState, useEffect } from 'react';

// CalendarSection.tsx - no unused variables
{slots.map((slot) => (

// Sidebar.tsx - proper block scoping
case 'diploma': {
  const studentName = prompt('Enter student name for diploma:');

Verification

• ✅ ESLint passes with 0 errors and 0 warnings
• ✅ TypeScript compilation successful
• ✅ Production build generates correctly
• ✅ Development server runs without issues
• ✅ All existing functionality preserved

The application is now cleaner, follows best practices, and maintains the same functionality while being more maintainable for future development.

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