/**
 * Calculates total price including tax.
 * 
 * @param amount - Base amount before tax
 * @param taxRate - Tax rate as decimal (0.18 = 18%)
 * @returns Total amount including tax
 * 
 * @example
 * const total = calculateTotal(100, 0.18); // 118
 */
function calculateTotal(amount: number, taxRate: number): number {
  return amount * (1 + taxRate);
}

// ❌ What (kod zaten söylüyor)
// Increment counter by 1
counter++;

// ✅ Why (neden böyle yapıldığını açıklıyor)
// Using setTimeout to debounce API calls
setTimeout(() => saveChanges(), 500);

// ✅ Business logic
// Premium users get 20% discount (JIRA-1234)
if (user.isPremium) discount = 0.20;

## [1.2.0] - 2025-01-15

### Added
- OAuth2 authentication

### Fixed
- Login button on mobile

### Security
- Patched XSS vulnerability

feat(auth): add Google OAuth
fix(api): handle null response
docs(readme): add installation
refactor(utils): simplify logic