codex

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Felipe Coury 3b8d22ec2c Improve paginated TUI history loading (#36949 )

## Why

Paginated sessions can have visible messages beyond the first item page, so
bounded hydration could leave resumed history or transcript previews empty and
the transcript viewer incomplete.

## What changed

- Scan paginated history until the configured rendered-row budget is filled,
  while retaining the configured scrollback beyond the visible viewport.
- Fully hydrate transcripts opened from the resume picker and build previews
  from bounded item pages, including when non-visible items precede messages.
- Stop pagination on repeated cursors and let `Esc` cancel an in-flight
  transcript load.
- Replay restored token usage for cold metadata-only resumes when its stored
  turn can be identified.

## Testing

- Add coverage for paginated and legacy transcript loading, bounded resume
  hydration, repeated cursors, transcript cancellation, and resize reflow.

GitOrigin-RevId: 2ce69f7d5eae88e2b09a27c333b00b1830ff17bf

2026-08-04 19:05:45 +00:00