fix: keep addon panels mounted when inactive

[dannyhw]

Summary

• All addon panels are now always rendered and hidden with display: none when inactive, instead of returning null and unmounting
• Applies to both react-native-ui and react-native-ui-lite MobileAddonsPanel implementations
• Removes early !active return guards from BackgroundPanel, controls Panel, and Notes

Problem

Previously, switching addon tabs would unmount the inactive panel and lose its state. This meant:

• Actions logged while viewing another tab were lost
• Panels had to re-initialize every time they became active
• Any in-progress state (e.g. control edits) was discarded on tab switch

Test plan

• Run the expo example, trigger some actions, then switch to the controls tab and back — actions should still be there
• Switch between all addon tabs — no crashes or blank panels
• Verify backgrounds, controls, and notes panels all render correctly when selected
• Test on both full UI and lite UI modes

[changeset-bot]

🦋 Changeset detected

Latest commit: 32fb3d6

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 9 packages

Name	Type
@storybook/addon-ondevice-backgrounds	Patch
@storybook/react-native-ui-lite	Patch
@storybook/addon-ondevice-controls	Patch
@storybook/react-native-ui	Patch
@storybook/addon-ondevice-notes	Patch
@storybook/react-native	Patch
@storybook/react-native-ui-common	Patch
@storybook/react-native-theming	Patch
@storybook/addon-ondevice-actions	Patch

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