fix(cli): preserve terminal scrollback buffer during run command

[gmpaliwal07]

Summary

Replace \x1Bc with \x1b[2J\x1b[H to preserve terminal scrollback buffer during lingo.dev run.

Changes

• Replace full terminal reset sequence \x1Bc with screen-only clear \x1b[2J\x1b[H in renderClear() in packages/cli/src/cli/utils/ui.ts

Testing

• Filled terminal with 100 lines of scrollback history
• Ran lingo.dev run — scrollback preserved after fix ✅
• All 554 tests pass locally

Visuals

Before fix (scrollback wiped):
https://github.com/user-attachments/assets/aac277e5-f4d6-4d54-b3ed-3c73f595c5c6

After fix (scrollback preserved):
https://github.com/user-attachments/assets/fae72cea-051d-4d07-88f4-05b942d338a5

Checklist

• Changeset added (if version bump needed)
• Tests cover business logic (not just happy path)
• No breaking changes (or documented below)

Closes #2011

Summary by CodeRabbit

• Bug Fixes
  • Improved terminal behavior in the CLI run command to preserve scrollback buffer, allowing users to review output history after execution.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: dc359a22-f1d0-4342-ab14-192ee4f59154

📥 Commits

Reviewing files that changed from the base of the PR and between 92c1e77 and 2f3374b.

📒 Files selected for processing (2)

• .changeset/bright-lions-suffer.md
• packages/cli/src/cli/utils/ui.ts

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📝 Walkthrough

Walkthrough

A changelog entry documents a patch release fixing a CLI bug where the terminal scrollback buffer was being cleared. The UI utility's terminal clear function is updated to preserve scrollback by using a screen-only clear ANSI sequence instead of a full reset command.

Changes

Cohort / File(s)	Summary
Changelog Entry .changeset/bright-lions-suffer.md	New patch release documentation for lingo.dev CLI fix addressing terminal scrollback preservation during run command.
CLI UI Utilities packages/cli/src/cli/utils/ui.ts	Modified renderClear function to use ANSI escape sequence \x1b[2J\x1b[H instead of console.log("\x1Bc"), clearing only the visible screen while preserving scrollback history.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Poem

A curious hare fixed a terminal woe,
Where scrollback would vanish like fresh winter snow.
With ANSI sequences, now small and precise,
The history remains—oh, what a nice device! 🐰✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: replacing the terminal reset to preserve scrollback during the run command.
Description check	✅ Passed	The description follows the template with all required sections completed: summary, changes, testing (including manual verification and test suite confirmation), visuals (before/after), and checklist items checked.
Linked Issues check	✅ Passed	The PR directly addresses the objective in #2011 by replacing the terminal reset sequence to preserve scrollback history, with evidence of testing and confirmation that the fix works.
Out of Scope Changes check	✅ Passed	All changes are directly related to the stated objective: the ANSI sequence modification in ui.ts, the changelog entry, and no unrelated modifications are present.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[gmpaliwal07]

@vrcprl @maxprilutskiy any feedback or improvements needed in this ??

[maxprilutskiy]

@gmpaliwal07 great work! 👏

[gmpaliwal07]

@maxprilutskiy thank you