fix(tui): reduce frequent full-screen redraws

[liruifengv]

Related Issue

N/A — the problem is explained in the next section.

Problem

Several frequent TUI interactions forced a destructive full-screen redraw (clear screen + clear scrollback + repaint everything): toggling tool output expansion with Ctrl+O, closing any mountEditorReplacement dialog or selector, dismissing the autocomplete menu, and resetting the session via /clear or /new. On long sessions this caused visible full-screen flicker and wiped the terminal scrollback, so users lost the ability to scroll up.

What changed

Removed the four app-level forced full renders so these interactions go through pi-tui's differential renderer instead:

• Ctrl+O expand/collapse (toggleToolOutputExpansion) now requests a normal render.
• Session reset (/clear, /new, session switch) no longer forces a redraw explicitly.
• restoreEditor (used when closing every dialog/selector) drops the overflow probe and tmux special case; it renders differentially.
• The autocomplete-close full-render machinery in the custom editor (render-edge tracking + forced redraw) is removed entirely.

Notes:

• Engine-level fallback full renders in pi-tui (e.g. when a change lands above the current viewport, as with /clear on a tall transcript) are intentionally untouched in this PR.
• Accepted side effect: after a tall dialog or the autocomplete menu closes, the editor may sit a few rows above the bottom (blank tail) until the next output appends.
• Tests: the obsolete test block that pinned the removed autocomplete-close behavior was deleted; the Ctrl+O, /btw, replay, and startup suites all pass (235 tests), plus tsc --noEmit and oxlint are clean.

Checklist

• I have read the CONTRIBUTING document.
• I have linked a related issue, or explained the problem above.
• I have added tests that prove my feature works.
• Ran gen-changesets skill, or this PR needs no changeset.
• Ran gen-docs skill, or this PR needs no doc update.

[changeset-bot]

🦋 Changeset detected

Latest commit: 47ab1f4

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@moonshot-ai/kimi-code	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[pkg-pr-new]

pnpm dlx https://pkg.pr.new/@moonshot-ai/kimi-code@47ab1f4

npx https://pkg.pr.new/@moonshot-ai/kimi-code@47ab1f4

commit: 47ab1f4

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 47ab1f4d18

ℹ️ About Codex in GitHub

Codex has been enabled to automatically review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

When you sign up for Codex through ChatGPT, Codex can also answer questions or update the PR, like "@codex address that feedback".