fix(mobile): expanded iOS environment card fields can take focus

[macodev00]

What Changed

On iOS, an expanded environment card in Settings → Environments ignored every tap: Label/URL never took focus, and Save/refresh/trash did nothing.

The expanded editor was wrapped in a Reanimated FadeIn/FadeOut view. That wrapper sits under a parent LinearTransition and an overflow-hidden list, and on iOS it paints while stealing hits so children never become first responder.

The editor now mounts in a plain View with collapsable={false}. Expand/collapse still uses LinearTransition on the row. This does not change the pingdotgg#12012 confirm-alert path.

Fixes pingdotgg#12085.

Why

Add Environment on the same nested stack uses the same inputs without entering/exiting and those fields still focus. The header Pressable still worked, so the sheet itself was not dead — only the animated expanded block.

UI Changes

No visual redesign. Expand no longer fades the editor in; the editor appears with the row height animation.

Could not capture iOS before/after here: this VM has no iOS simulator/device. Verify on an iPhone: Settings → Environments → expand a saved environment → Label focuses and types; Save/refresh/trash receive presses.

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes (blocked: no iOS device in this environment)
• I included a video for animation/interaction changes