switch hf_dataset to AE-Talk-bot/log-C-Jun-18-2026 (split per-condition to relieve HF commit rate limit)

switch to log-Jun-17-2026 + C-non

Initial deploy of C (non-ca): no post-essay chat. Stripped chat additions from answer-ca base.

Rename condition + mode_prefix to *-ca to match local folder rename. hf_dataset unchanged (legacy data stays in same dataset under new subfolder).

UI parity with socratic/socratic-frame: (1) hide Gradio Chatbot top chrome via show_label=False + CSS for share/clear/delete/trash; (2) strip the '# Case: ...' H1 from the initial chatbot message via display-only CASE_TEXT_DISPLAY; (3) hide the left yellow feedback-hint column (guide-col visible=False) so chatbot expands left, and drop the bottom-row mirror column to keep action buttons aligned under right-col.

Deploy: no_ai control bot — chapters TOC + essay logging