3D Model Viewer & Converter

- Added automatic multi-model layout and size fitting. Models of different sizes are normalized to a consistent visual scale and arranged in a grid, which expands automatically beyond 9 models. - Automatic layout includes a global toggle and remembers your setting. When disabled, models continue to be appended on the right; the helper grid and camera framing also adapt to the current layout. - Fixed an issue where deleted recent files could reappear after restarting the app. Deleting a recent file now also removes its saved history record and the corresponding file from the import folder. - Improved two-finger pinch and scroll gestures on trackpads, mouse-wheel zoom, and touch zoom for smoother, more precise size control. - Expanded onboarding with guidance for the view orientation helper in the bottom-right corner, plus clearer explanations of how Exploded View, Orthographic Projection, and Cross Section work in multi-model scenes. - Added Spanish, Turkish, and Russian interface support.