1. Ability to save settings
2. Customise text colour
3. Text stroke/outline
4. Custom timestamp formats (e.g. milliseconds, frame count, no-frames)
5. Reverse geocoding GPS
6. Fade-in/Fade-out of overlay (w/ adjustable speed)
7. Various export formats / quality levels
8. Batch processing (multi-select up to 20 videos)
9. Tons of little UI tweaks
10. More fonts, more time settings, more date settings
11. Better preview mode

1. Add user-requested feature to stamp overlay over additional positions (top, bottom, left, right) instead of only the corners.

2. Extensive code modernisation:
  i. NavigationView -> NavigationStack in ContentView and FontPickerView
  ii. .cornerRadius -> .clipShape(RoundedRectangle) across all files
  iii. Deprecated style initializers replaced (.linear, .segmented, .roundedBorder, .tint)
  iv. TimecodeCompositor static var protected with NSLock for thread safety
  v. Sendable/concurrency fixed — @MainActor on both VideoProcessor and VideoManager, removed @unchecked Sendable, removed @preconcurrency
  vi. @Observable macro replaces ObservableObject/@Published on VideoManager; @State replaces @StateObject in ContentView
  vii. Debouncing added via schedulePreviewUpdate() with 150ms delay, cancels previous task
  viii. Dead code removed — testTimecodeGeneration(), duplicate processVideo, unused let _ = generator.get...() calls
  ix. Temp file cleanup — VideoProcessor cleans up after photo library save; VideoManager cleans up previous temp file when loading new video
  x. Cancellation support — cancelProcessing() on both VideoManager and VideoProcessor, cancel button in UI during processing
  xi. Error handling improved — AlertType enum replaces string-based alert comparison; silent catch {} blocks now set status messages or nil out state
  xii. Async/await modernization — requestPermission(), processVideo(), saveToPhotoLibrary() all use async/await; deprecated exportAsynchronously replaced with await export();
  DispatchQueue.main.async removed
  xiii. sRGB color space in TimecodeCompositor for consistent rendering

  All changes maintain iOS 18 as the deployment target — no iOS 26-only APIs were used.

Updated to meet Apple's latest policies

New features: Adjust Font, Size, Color, Justification. New time display settings.

Total UI rewrite, live WYSIWYG view of the overlay. Note that vertical and upside down video will need to be rotated manually in the photo album after processing.