While a provider error is pinned in the banner above the editor the inline transcript block is suppressed, so the prior guard skipped re-rendering on Ctrl+O and the full body stayed unreachable until the next turn.
- Track whether the message carries a truncatable error regardless of pinning, so setExpanded re-renders while pinned.
- Render the inline error block in full when expanded even while pinned; keep it suppressed only while pinned and collapsed.
- Disable the streaming fast path whenever the inline error block is drawn.
Fixes#6555
Turn-ending provider errors rendered inline through
AssistantMessageComponent#appendErrorBlock, capped at 8 lines with no
setExpanded method, so isExpandable filtered the component out of the
Ctrl+O tool-output expansion and the truncated tail was unreachable in
the live TUI (full text was persisted but not shown).
- Add setExpanded to AssistantMessageComponent; when expanded the error
block renders the full body (tabs replaced, blank lines preserved,
Text word-wraps to width).
- Collapsed view appends a dim "+N more lines (Ctrl+O to expand)" hint so
the truncation and its remedy are discoverable.
- Only re-render on toggle when the last render produced a truncatable
error block, so expansion skips ordinary turns.
Fixes#6555