Components.AI: Add RTL and logical-layout support

### Is your feature request related to a problem? Please describe the problem.

Physical CSS properties and alignment assumptions do not adapt to right-to-left direction.

### Describe the solution you'd like

Use logical properties and direction-aware message/action alignment across shells, composer, media, and decorators. Add representative RTL coverage without reversing semantic iconography incorrectly.

### Additional context

Leaf task for #68227 requirement I9.

Start with requirement I9 in #68227, then locate the shells, composer, media, and decorators named in this issue. Add representative RTL coverage and verify that logical properties and direction-aware message/action alignment work across those areas without incorrectly reversing semantic icons.

Written by the indexing model from the issue text.