bug(ui): SDUI CheckboxListTile under opaque dialog DecoratedBox

[ZhuchkaTriplesix]

Parent

Part of epic #490 (post-motion UI polish). Same Flutter 3.44 assert as Preferences.

Problem

sdui_form_builder.dart builds CheckboxListTile for extension connection forms. Those forms live under opaque popover BoxDecoration containers → ListTile ink/splash assert.

Proposal

Same fix family as Preferences: non-ListTile checkbox row, or local Material around each checkbox tile. Prefer one shared helper if both land together.

Files

• lib/core/sdui/sdui_form_builder.dart
• lib/features/connections/extension_connection_form.dart (host chrome)

Acceptance

• Extension connection form with checkbox fields: no ListTile/DecoratedBox assert
• Checkbox bind/save behavior unchanged

[ZhuchkaTriplesix]

Shipped on dev (PR targeted dev, auto-close did not fire).