Perplexity's /rest/models/config now exposes claude50sonnet and
claude50sonnetthinking. Add both to KNOWN_MODELS with the official
labels from the config.
The stream's display_model can report "turbo" even when the requested
model was honored, so prefer user_selected_model when present and not
"turbo" so tool metadata reflects the model actually used.
Closes#7
Co-authored-by: Ivan Pereira <183991+ivanrvpereira@users.noreply.github.com>
Hardcode is_incognito: true in the Perplexity request and remove the
toggle surface: the incognito tool parameter, PI_PERPLEXITY_INCOGNITO
env var, config file field, /perplexity-config prompt, and TUI status
indicators. Config and resolveDefaultModel are now model-only.
Supersedes the incognito portion of PR #4.
Co-authored-by: Ivan Pereira <183991+ivanrvpereira@users.noreply.github.com>
