fix(tui): recognize CSI-u Shift+Enter as newline

[haosenwang1018]

Related Issue

Resolve #256

Problem

Windows Terminal and some other terminals can encode Shift+Enter as the CSI-u sequence ESC [ 13 ; 2 u. CustomEditor already handled LF, ESC + CR, ESC [ 13 ; 2 ~, and Ctrl-J as newline shortcuts, but did not recognize this CSI-u variant, so the sequence fell through to the base editor instead of inserting a newline.

What changed

• Treat the CSI-u Shift+Enter sequence as a newline input in CustomEditor.
• Keep the existing newline sequences unchanged.
• Extend the existing custom editor shortcut test to assert that CSI-u Shift+Enter fires the newline telemetry hook and inserts a newline.
• Add a patch changeset for @moonshot-ai/kimi-code.

Verification

• pnpm --filter @moonshot-ai/kimi-code run test — 111 files / 1015 tests passed / 2 skipped.
• pnpm --filter @moonshot-ai/kimi-code exec vitest run test/tui/components/editor/custom-editor.test.ts
• pnpm --filter @moonshot-ai/kimi-code run typecheck
• pnpm changeset status --since=origin/main
• pnpm exec oxlint apps/kimi-code/src/tui/components/editor/custom-editor.ts apps/kimi-code/test/tui/components/editor/custom-editor.test.ts — 0 errors; existing escape-sequence warnings remain in unchanged paste-marker test lines.

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: 3622cc4

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

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