fix: keep measurement textarea out of tab order

[nrps9909]

Summary

• replace the invalid tab-index attribute on the autosize measurement textarea with the standard tabindex
• add a regression that verifies tabindex="-1" is present and the misspelled attribute is absent

Browsers ignore tab-index, so the intended keyboard safeguard was not applied. This is the rc-input counterpart of react-component/textarea#80 and its open fix #81; rc-input is a separately published package with the same copied measurement implementation and currently has no corresponding issue or PR.

Verification

• Exact-base regression: 127 passed, 1 failed because tabindex was missing
• Fixed full suite: 10 suites, 128 tests, 22 snapshots passed
• npm run tsc
• npm run lint — 0 errors, 2 pre-existing Hook dependency warnings
• npm run compile — ESM, CJS, declarations, and Less compilation passed
• focused Prettier check and git diff --check

I checked every current open rc-input PR changed file and found no overlap with src/calculateNodeHeight.tsx.

AI assistance disclosure: Codex was used to confirm the duplicated invalid attribute in the separately published rc-input package, audit open work, add the regression, and run verification. The exact-base failure and one-token source correction were reviewed locally.

Summary by CodeRabbit

• Bug 修复

  • 修正自动调整高度模式下隐藏测量文本框的键盘焦点行为，使其不会进入 Tab 键导航顺序。

• 测试

  • 新增测试，确保隐藏文本框使用正确的 tabindex="-1" 属性。

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 7cd6f116-2fb8-44ec-bfa1-7a146bd6b48e

📥 Commits

Reviewing files that changed from the base of the PR and between 52086bb and 8f32d12.

📒 Files selected for processing (2)

• src/calculateNodeHeight.tsx
• tests/TextArea.test.tsx

Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review.

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Walkthrough

隐藏测量 textarea 现在使用有效的 tabindex="-1" 属性。测试验证该属性存在，并确认无效的 tab-index 属性不存在。

Changes

隐藏 textarea 的 Tab 顺序修正

Layer / File(s)	Summary
修正属性并添加验证 src/calculateNodeHeight.tsx, tests/TextArea.test.tsx	隐藏测量 textarea 使用 tabindex="-1"。新增 autoSize 测试，验证正确属性存在且 tab-index 不存在。

Estimated code review effort: 1 (Trivial) | ~5 minutes

Merge Risk: ⚪ Minimal · up to 8f32d

The change restores the hidden measurement textarea’s intended exclusion from keyboard tab order and adds regression coverage; no actionable merge-blocking risk remains after normal checks and review.

Poem

小兔发现属性排错队，
把 tab-index 换成 tabindex。
隐藏文本框安静退场，
Tab 键顺畅跳过身旁。
测试点头，耳朵轻扬。

🚥 Pre-merge checks | ✅ 2 | ❌ 3

❌ Failed checks (3 warnings)

Check name	Status	Explanation	Resolution
Linked Issues check	⚠️ Warning	PR 将测量 textarea 的 tabindex 修正作为主要变更，但直接关联的 issue #81 要求修复禁用输入框按 Enter 时的错误。当前变更未实现组合事件、按键管理、禁用状态处理或重复输入事件防止逻辑。	请实现 issue #81 的编码要求，或移除该 issue 的直接关联并关联与 tabindex 修复相关的 issue。
Out of Scope Changes check	⚠️ Warning	相对于直接关联的 issue #81，tabindex 属性修复和对应测试属于无关变更。它们没有处理禁用输入框按 Enter 时的错误。	请将 tabindex 修复拆分到独立 PR，或更新关联 issue，使其明确包含测量 textarea 的 Tab 顺序要求。
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	标题准确概括了主要变更，即使测量 textarea 不参与 Tab 键顺序。

• Fix all pre-merge checks with AI

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests

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