Restore sliver scrolling in Action Mode

[atavism]

Keep Action Mode’s sliver structure while preserving the small-screen fixes from #9056:

• Use CustomScrollView with SliverPadding and SliverToBoxAdapter.
• Preserve the minimum globe height and message wrapping without reintroducing the SliverFillRemaining sizing issue.

Summary by CodeRabbit

• Bug Fixes
  • Improved scrolling behavior in the Action Mode tab, including on smaller screens and with larger text sizes.
  • Preserved existing content sizing and layout while enabling content outside the globe to scroll as expected.
  • Globe drag interactions continue to rotate the globe without unintentionally moving the surrounding scroll view or pager.

[coderabbitai]

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• test/features/action_mode/action_mode_widgets_test.dart

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📝 Walkthrough

Walkthrough

ActionModeTab now uses CustomScrollView with padded slivers. Its content and sizing remain unchanged. Tests cover small-screen scrolling and globe drag behavior.

Changes

Action mode scrolling

Layer / File(s)	Summary
Sliver scroll container and test coverage lib/features/action_mode/action_mode.dart, test/features/action_mode/action_mode_widgets_test.dart	ActionModeTab replaces SingleChildScrollView with CustomScrollView, SliverPadding, and SliverToBoxAdapter. A new test verifies scrolling on a small screen. The globe drag test updates its scrollable lookup to use CustomScrollView.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Merge Risk: ⚪ Minimal · up to e824b

The sliver-based scrolling change includes coverage for small-screen scrolling and globe drag ownership. No current merge-blocking risk is identified.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: restoring sliver-based scrolling in Action Mode.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
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
• Commit unit tests in branch atavism/action-mode-followup

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[Copilot]

🟡 Changes recommended

The widget test should verify that the content actually scrolls.

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Pull request overview

Restores sliver-based scrolling in Action Mode while preserving small-screen layout fixes.

Changes:

• Replaces SingleChildScrollView with CustomScrollView and slivers.
• Preserves minimum globe sizing and wrapped status content.
• Updates widget test scroll-view lookup.

File summaries

File	Summary
lib/features/action_mode/action_mode.dart	Restores sliver-based Action Mode layout.
test/features/action_mode/action_mode_widgets_test.dart	Updates scrollable lookup; moderate issue remains because actual scrolling is not verified (3 votes).

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 1
• Review effort level: Lite

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[atavism]

@jigar-f Could you take a look at this one

[jigar-f]

Thanks for adding it back.