Release v1.2.1

• Recording: Rewrote the start-recording flow.
• Recording: Changed game hooking from fullscreen detection to executable-based window capture.
• Settings: Removed "Capture Windowed Games" toggle (now the default behavior).
• Settings: Removed "Enable Display Recording" toggle (now always enabled).
• Settings: Added "Stretch 4:3 to 16:9" option for 4:3 aspect ratio content.
• Settings: Updated the settings page to improve navigation.
• UI: Made monitor selection and capture method setting always visible.
• UI: Improved settings page section spacing and scroll tracking.
• Upload: Added a cancel option to the upload progress UI.
• Upload: Added a progress bar to indicate upload status.
• Sessions: Added an option to auto-discard sessions without manual bookmarks (#78).
• Game Detection: Fixed Allow/Block setting not persisting after restarts.
• Game Detection: Added splash screen filtering by skipping processes when a known game executable exists in the same directory.