1、Optimized overall user experience. 2、Added a countdown timer for photos.

Added more output aspect ratios: Full Screen, 1:1, 5:4, 4:3, and 16:9. Improved video recording, with video output now following the selected ratio and quality settings. Added pinch-to-zoom on the main camera preview, with double-tap to reset to 1x. Camera zoom now applies consistently to both photos and videos. Improved Picture-in-Picture positioning, including draggable placement and synced output. Optimized PiP composition to better avoid covering the main subject or face. Fixed an issue where saved videos could show a black thumbnail or black first frame in Photos. Fixed video preview ratio on the result screen so it now matches the actual output. Fixed an issue where swapped front/back cameras were not reflected correctly in photo or video output. Improved app stability when switching between foreground and background. Reduced cases where dual-camera capture could trigger two shutter sounds. Fixed an issue where video audio could continue playing after closing the result screen. Improved remove-watermark purchase state handling and restore purchase feedback. Polished localization, privacy terms, About page, and other details.