fix(activity-feed-v2): cap task message textarea at 6 rows

[jackiejou]

Description

In the task modal v2, a long message with many line breaks grew the message textarea without bound, pushing the modal footer buttons out of view.

The Blueprint TextArea autosize supports a maxRows cap: the field grows up to the cap and then scrolls internally. Added maxRows={6} to the task message field (minRows={3} unchanged). Six rows matches the effective cap on the v1 task form, which limits the same field with max-height: 140px in TaskForm.scss.

Testing

• yarn test --watchAll=false --testPathPattern="task-modal-v2" - 4 suites, 65 tests passed.
• The grow-then-scroll behavior itself is implemented and tested in @box/blueprint-web and is not observable in jsdom, so no new unit test; verified visually that the textarea stops growing at 6 rows and scrolls, keeping the footer buttons in view.

Summary by CodeRabbit

• Improvements
  • Limited the task message field to six visible rows for a more compact form layout.

[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

Run ID: 5d37a2f2-bc07-4fc5-8bdf-d3590e16e0b1

📥 Commits

Reviewing files that changed from the base of the PR and between 8a818a6 and 823313d.

📒 Files selected for processing (1)

• src/elements/content-sidebar/activity-feed-v2/task-modal-v2/TaskFormV2.tsx

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Walkthrough

The task message TextArea in TaskFormV2 now uses maxRows={6}, limiting its rendered height while preserving existing form behavior.

Changes

Task message layout

Layer / File(s)	Summary
Limit task message rows src/elements/content-sidebar/activity-feed-v2/task-modal-v2/TaskFormV2.tsx	The task message TextArea now caps its rendered height at six rows.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• box/box-ui-elements#4662: Directly modifies the same TaskFormV2 TextArea with maxRows={6}.
• box/box-ui-elements#4667: Updates the same TaskFormV2 component and related task-form attributes.

Suggested reviewers: zhirongwang, jmcbgaston, jpan-box

Poem

I’m a rabbit with rows to spare,
Six neat lines now fit with care.
The message grows, then gently stays,
No towering box on busy days.
Hop, hop—form height finds its place!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: capping the task message textarea at six rows.
Description check	✅ Passed	The description explains the issue, the fix, and testing results, so it is sufficiently complete.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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