ui: added single line reasoning preview (#23601)
* webui: added single line reasoning preview.
* patch: reduce width slightly for the previewing section
* refactor: move formatter constants to the right file
* feat: reimplement reasoning preview with throttled dynamic per-line rendering
* chore: fix spacing
Co-authored-by: Aleksander Grygier <aleksander.grygier@gmail.com>
* chore: refactor to requested changes
* refactor: grouped by capture pattern instead of block-level + inline
* ui: fax interrupt state only trigger for 1st reasoning message
* chore: make reasoning preview respects showThoughtInProgress setting
* chore; newline at EOF
Co-authored-by: Aleksander Grygier <aleksander.grygier@gmail.com>
* fix: thread rawContent so collapsible content can handle compute preview
* patch: showThoughtInProgress accidentally blocks rawContent being passed
* chore: fix lint
* chore: change smoke test
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Co-authored-by: Aleksander Grygier <aleksander.grygier@gmail.com>
