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23f3cd5f10
Replace the strip-in-preexec / re-add-in-precmd pattern for OSC 133
marks with a save/restore approach. Instead of pattern-matching marks
out of PS1 (which exposes PS1 in intermediate states to other hooks), we
save the original PS1/PS2 before adding marks and then restore them.
This also adds dynamic theme detection: if PS1 changed between cycles
(e.g., a theme rebuilt it), we skip injecting continuation marks into
newlines. This prevents breaking plugins like Pure that use pattern
matching to strip/rebuild the prompt.
Additionally, move _ghostty_precmd to the end of precmd_functions in
_ghostty_deferred_init (instead of substituting in-place) so that the
first prompt is properly marked even when other hooks were appended
after our auto-injection.
There's one scenario that we still don't complete cover:
precmd_functions+=(_test_overwrite_ps1)
_test_overwrite_ps1() {
PS1="test> "
}
... which results in the first prompt not printing its prompt marks
because _test_overwrite_ps1 becomes the last thing to run, overwriting
our marks, but this will be fixed for subsequent prompts when we move
our handler back to the last index.
Fixes: #11282