v2.7.0

Changes

• Internal code reorganization for improved readability and maintainability
  • Extracted named constants (MAX_RETRIES, BASE_RETRY_DELAY, ZONE_CACHE_TTL, etc.)
  • Added explicit section headers and documentation comments throughout
  • Extracted helper functions (sanitizeEmail, formatTime, escapeHtml, normalizeDescription, createStyleElement, applyFontSizeStyles, applyColorStyles, setsEqual)
  • Grouped related logic into clearly labeled sections
• Removed build system dependency - card remains a single deployable file with no build step required
• No functional changes - identical behavior to v2.6.0