refactor(aren/sav): restructure AREN wizard flow, sync dashboard & redesign SAV integrations
Summary
AREN Wizard Changes
- Add general info step after welcome (language, country, phone number)
- Add WhatsApp integration under new Communication category with config fields
- Remove "Rappels Intelligents" feature and reminders step
- Remove Español from transcription languages
- Remove automatic actions from transcription step
- Add custom reminder input (number + unit selector) to agenda preferences
- Add follow-up reminders (24h/48h mutually exclusive) to email management
- Update resume step to cover all wizard steps including integration config status
- Rename final button from "Créer l'agent" to "Activer l'agent"
AREN Dashboard Sync
- Add WhatsApp integration card under Communication category
- Add phone number field to General config tab
- Remove "Rappels Intelligents" from features list
- Remove Rappels config tab entirely
- Remove Español from transcription, remove automatic actions
- Align duration options (add 1h30, 2h) and buffer options (add 30min) with wizard
- Add custom reminder input to agenda configuration
- Add follow-up reminders (24h/48h) to emails configuration
SAV Integration
- Restructure integration section with dedicated config view components per platform
- Add IAVIA solution config and platform distribution views
close [IAV-910]