VideoFramePlayer: drag-crop + aspect lock + lanczos resize + upscale

- Aspect ratio presets: free, original, 1:1, 4:3, 3:4, 16:9, 9:16, 2:1, 21:9, custom

- Olm-DragCrop style overlay: 8 handles + interior drag, clamped to preview rect (no scroll-out)

- Resize methods: lanczos (PIL for B<=4, GPU antialiased bicubic for B>4), bicubic, bilinear, area, nearest-exact

- target_width/target_height + upscale_factor for integrated resize+upscale

- output_mode: current_frame (legacy) or all_frames (process whole batch)

- New outputs: processed, out_width, out_height, crop_*_px

Author: Code2Collapse