Clamp session headers to narrow terminal widths - #34775
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## Why Session header rows can exceed the available inner width when the terminal is narrow, causing the bordered header to render wider than its requested width. ## What changed Truncate each session header row to the available inner width and append an ellipsis when content overflows. ## Testing Add a snapshot test for a 44-column session header and assert that every rendered line matches the requested width. GitOrigin-RevId: 7cf0ea48aa95a6f1ddd1a9dbb7c7fb70bdbcb5a3
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Clamp session headers to narrow terminal widths
Why
Session header rows can exceed the available inner width when the terminal is
narrow, causing the bordered header to render wider than its requested width.
What changed
Truncate each session header row to the available inner width and append an
ellipsis when content overflows.
Testing
Add a snapshot test for a 44-column session header and assert that every
rendered line matches the requested width.