aisman

Direct session 27, Step 1: Fix navigation, CSS, auto-selection bugs; complete S2 state refactoring:
- Fix issue back/forward navigation not selecting the detail
- Fix project auto-selection not working after returning from org settings
- Fix CSS: 'Fix' buttons lost outline border and aim-btn-xs sizing
- Restructure S2 object hierarchy for logical dot-access
- Update all external references to S2's restructured properties
- Remove legacy S object and rename S2 to S