The delete endpoint only removed sessions from the WebUI JSON store,
silently no-oping on CLI sessions (which live in state.db). The trash
button showed 'Conversation deleted' but the session reappeared on
next refresh.
Fix: after the existing WebUI delete, also call delete_cli_session()
which removes the session + messages from state.db. Wrapped in
try/except so WebUI-only sessions still delete normally.
New delete_cli_session() in api/models.py mirrors the existing
get_cli_session_messages() pattern for state.db access.
Closes#87
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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