fix(statusline): don't clobber global statusline during autocmd #41169

Problem:
With `laststatus=3`, a pager float shares the main grid's statusline
row. Setting a diagnostic fires `DiagnosticChanged`, whose handler calls
`nvim__redraw({ statusline = true })`.

Analysis:
Inside the autocmd, `curwin` is temporarily switched to the tiled window
showing that buffer, so `win_redr_status()` paints its statusline over
the pager's `[Pager]` statusline on the shared row. After the autocmd,
`curwin` is restored but the pager statusline is never repainted.

Solution:
Use `ctx_saved_curwin()` decide whether to draw the global statusline,
matching `win_redr_stl_expr()` and `update_screen()`. No behavior change
if no buffer-context switch is active.

0 files changed, 0 insertions, 0 deletions