fix: recover from optimizer state mismatch on resume; add chi-based IoC routing

feat(heuristic): add vernam/running_key 4-group rule, kama_sutra, stager_route, chaocipher/m209 IoC splits; tighten bazeries

feat: train transformer on HF A10G + heuristic improvements

feat: Beaufort/Vigenere-auto/rail-fence/columnar decoders + trigram hill climber

fix: pin gradio>=4.44.1, modernize typing, clean ruff lint

feat: jn25 value-range detection 7->24 TP; improved zimmermann routing

feat: route plaintext→null_cipher; null_cipher 0→14 TP; acc=38.12%

feat: venona_pad_reuse digit-set expansion 2->22 TP; acc=37.40%

feat: wallis_cipher rate-based detection, trithemius progressive-shift detector

feat: lorenz near-plaintext detection via chi+bgm signal

feat: chi-based affine detection (threshold 50); fix word_score test

feat: X-padding detection for scytale/stager_route

feat: chi-based atbash/rot13/transposition detection; expand COMMON_WORDS

fix(space): pin huggingface_hub<0.26.0; restore gradio 4.x-compatible app.py

fix(heuristic): distinguish arnold_andre vs book_cipher by line-number range

fix(heuristic): add English word guard for voynich vs null_cipher; refine 2-digit cipher disambiguation

fix(heuristic): range-based numeric cipher discrimination + Voynich detection

feat: expand to 81 ciphers — improved heuristic, 12 new cipher generators, focal-loss training

Make Space HF-launch-ready: fix boot crash, add solver, expand eval, polish UX

10/10 polish: Compare Mode, Kasiski/Friedman, rich dataset schema, expanded tests/docs

Initial Cipher Detective AI public foundation