fix: correct DATASETS dict, genimage->download_genimage_subset

fix: append missing DATASETS dict and __main__ block (truncation bug)

fix: append missing DATASETS dict and __main__ block (truncation bug)

fix: rewrite diffusiondb/genimage downloaders to use working sources

fix: restore missing DATASETS dict and __main__ block in download_ai.py

fix: remove trust_remote_code, use Parquet configs for DiffusionDB/GenImage

fix: use as_posix() for manifest paths to avoid Windows backslash bug

fix: replace unicode box-drawing chars that crash Windows cp1252

fix(test+frontend+scripts): methods count, 25->26, logo, script cleanup

Merge branch 'main' into feature/platform-forensics

feat(platform): invariant tests + pyflakes cleanup

fix: audit pass — unused imports, None crash guard, emojis, accuracy claims, broken f-strings

feat: add dataset download scripts for real and AI sources