OSC 133 k=r/k=s (commit 31982e2, #2954) causes input line flicker with third-party widgets that call `zle reset-prompt`

[yng87]

Since commit 31982e2 (#2954, 2026-06-02), the input line flickers whenever a third-party widget calls zle reset-prompt.

Reproduction

1. p10k at a0c9dbe8 (current HEAD)
2. Pure preset (config/p10k-pure.zsh)
3. zeno.zsh with bindkey ' ' zeno-auto-snippet (the widget ends with zle reset-prompt)
4. Terminal: reproduced on both Ghostty and Alacritty (not terminal-specific)
5. Type g + Space → expands to git, but the input line flickers for ~1 frame

Workaround

Pin to the commit before 31982e2:

[plugins.powerlevel10k]
github = 'romkatv/powerlevel10k'
rev = '604f19a9'

Notes

• The commit message says "for iTerm2 >= 3.7.0", but the flicker reproduces on non-iTerm2 terminals. Is the emission intended to be unconditional, or should it be gated on iTerm2?
• Replacing zle reset-prompt with zle -R in the widget does not fix it, suggesting the flicker is triggered at the redraw level.