🗃️ Local Storage Persistence
Saves last-used custom text, font size, and label type (dropdown selection)
Automatically restores preferences on page reload
↩️ Undo Functionality
"Undo" button removes the most recently injected label
Labels are tracked with data-injected-label attribute
Visual feedback when undo is executed
Improved:
✨ User Experience
Auto-focus on textarea when "Custom text" is selected
Clearer error messages for validation (empty text/invalid font size)
Smoother status overlay animations
🛡️ Robustness
Better error handling in all operations
Clean DOM markup with data attributes
Memory leak prevention (proper element cleanup)
Fixed:
🐛 Status overlay sometimes persisting beyond timeout
🐛 Font size input allowing invalid values
