Add per-scope availability, duplication, active-profile status, and inline project selection while keeping the profile switcher synchronized with runtime state.
Reconcile unavailable profiles at explicit disable, deletion, project-transition, and context-creation boundaries; polish validation, prompt layout, deletion, and completion states; and extend focused backend and WebUI coverage.
Add the Easy and Advanced editor modal, its single Alpine store, profile-switcher entry points and avatars, and the fresh-chat handoff after a successful save.
Restore focus across the shared modal stack and lock down the current interaction contracts as a stable baseline for the dedicated visual-polish phase.
