Show download files from first tile, update every 10 tiles

Fix GPU: single @spaces.GPU on segment_tile only, no nested decorators

Add checkpoint saves every 100 tiles with downloadable files mid-run

Fix GPU: move @spaces.GPU to segment_tile and load_model instead of generator

Add scan progress box to live preview, update every 10 tiles

Add GPU debug logging to diagnose CUDA detection issue

Add @spaces.GPU decorator to enable GPU allocation on HF Spaces

Fix GPU detection: use runtime check instead of import-time

Add 256px tile size option and set as default

Add tiling pipeline with live dashboard and confidence tracking

Add multi-feature support with presets and confidence scores

Replace GDAL with rasterio for GeoTIFF conversion

Add Janus building footprint extraction app