* fix(tui): refresh virtual transcript on viewport resize
Notify scroll subscribers when ScrollBox viewport bounds change and key virtual-history updates on viewport height so resize/keyboard changes remount the tail rows instead of leaving stale spacers visible.
* test(tui): isolate viewport-height remount regression
Keep the resize delta below the virtual history scroll quantum so the regression test specifically depends on viewport height entering the snapshot key.
* test(tui): clarify virtual history resize snapshot
Update the resize regression and comments so the test specifically guards viewport-height changes in the virtual-history snapshot key.
* docs(tui): clarify scrollbox subscription signals
Document that ScrollBox subscribers are notified for renderer-computed viewport and content bound changes, not only imperative scrolls.
* fix(tui): recompute virtual tail after width resize
Avoid preserving a frozen virtual transcript range when wrapped rows shrink enough that the old tail window no longer covers the viewport.
* fix(tui): preserve transcript tail across resizes
Wraps + heights are column-dependent, so a width change must remeasure
every row and the renderer must repaint the full viewport.
- Key virtualRows on cols so React remounts wrapped rows on resize.
- Snap back to bottom after sticky-mode resize once React rerenders.
- Reserve a scrollbar + gap column in transcriptBodyWidth (non-termux).
- Full repaint on any viewport height change (was: shrink-only).
- ScrollBox scrollHeight uses deepest child bottom so sticky-bottom
math can reach the real final rendered row after reflow.
- DECSTBM fast-path now requires full container rect match.
* feat(tui): responsive banner tiers
Terminals can't scale glyphs, so the banner now picks a layout per
column width instead of always rendering the full 101-col logo:
- Wide (>= logo width): full ASCII logo + tagline.
- Mid (>= 58 cols): centered rule banner that expands with viewport.
- Narrow (>= 34 cols): brand line + tagline, both width-aware.
- < 34 cols: hidden.
SessionPanel surfaces model/cwd/sid inline when the hero column is
hidden, so narrow layouts don't lose that info. Logo width constants
derive from the art itself.
* fix(tui): re-check sticky inside resize debounce + document remount
Addresses Copilot review on PR #31077:
- onResize now re-checks isSticky() inside the 100ms timer so manual
scrolls during the debounce window don't get snapped back to tail.
- Comment on the virtualRows cols-keying calls out the deliberate
trade-off: per-row local state (e.g. systemOpen) resets on resize so
yoga can remeasure off live geometry. The hook's scale-by-ratio path
is too approximate for mixed markdown widths.
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