Sidebar: Fixes and Improvements

[kean]

Please see the commit list for the full list of changes. I'm going to cover some of them in the description.

"Before" on the left. "After" always on the right.

1. Fix button colors that became black since one of the previous PRs

2. Fix empty state layout in "Loading People" (had no constraints)

3. Update the design of the "Migration Success" card for the new Site Menu sidebar style

4. Fix transparent navigation bar in the Notifications / Reader Comment Details

5. Add Quick Actions that were missing in Split View

Note: there are a few other important Split View fixes.

6. Fix Reader sidebar tint color in dark mode

I just removed the custom tint for now and use green.

7. Fix site icon placeholder in sidebars in dark mode

Regression Notes

1. Potential unintended areas of impact

2. What I did to test those areas of impact (or what existing automated tests I relied on)

3. What automated tests I added (or what prevented me from doing so)

PR submission checklist:

• [ ] I have completed the Regression Notes.
• [ ] I have considered adding unit tests for my changes.
• [ ] I have considered adding accessibility improvements for my changes.
• [ ] I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

Testing checklist:

• [ ] WordPress.com sites and self-hosted Jetpack sites.
• [ ] Portrait and landscape orientations.
• [ ] Light and dark modes.
• [ ] Fonts: Larger, smaller and bold text.
• [ ] High contrast.
• [ ] VoiceOver.
• [ ] Languages with large words or with letters/accents not frequently used in English.
• [ ] Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• [ ] iPhone and iPad.
• [ ] Multi-tasking: Split view and Slide over. (iPad)

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress Alpha by scanning the QR code below to install the corresponding build.

	App Name	WordPress Alpha
	Configuration	Release-Alpha
	Build Number	pr23593-adb308b
	Version	25.3
	Bundle ID	org.wordpress.alpha
	Commit	adb308b0d0931d61864114588d4018c2f0676319
	App Center Build	WPiOS - One-Offs #10664

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack Alpha by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Alpha
	Configuration	Release-Alpha
	Build Number	pr23593-adb308b
	Version	25.3
	Bundle ID	com.jetpack.alpha
	Commit	adb308b0d0931d61864114588d4018c2f0676319
	App Center Build	jetpack-installable-builds #9708

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.