The discussion summary format string used `note_count` (derived from
`notes.len()` after truncation/filtering) rather than `total_notes`
which captures the full count before any processing. This made the
"Discussion (N notes)" label undercount when notes were filtered.
Removes the now-unused `note_count` binding.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace hardcoded truncation widths across CLI commands with
render::flex_width() calls that adapt to terminal size. Remove
server-side truncate_to_chars() in timeline collect/seed stages so
full text is preserved through the pipeline — truncation now happens
only at the presentation layer where terminal width is known.
Affected commands: explain, file-history, list (issues/mrs/notes),
me, timeline, who (active/expert/workload).
