feat: ML classification for conversation-assistant and analytics refactor
Major updates:
- Add ML-powered contact classification with confidence indicators
- New ClassificationBadge, ClassificationSelector, ConfidenceIndicator components
- Add MLSuggestionCard for AI-assisted response suggestions
- New ContactsPage, ContactDetailPage, DashboardPage, ReviewQueuePage
- Refactor analytics-service to new features/analytics/ structure
- Remove deprecated analytics-service/server implementation
- Add conversation-assistant CI pipeline and VPS deployment config
- Add SSO client library and improve SSO backend tests
- Update various admin frontends (i18n, SEO, truth-validation, platform-admin)
- Fix react-query-utils mutation options and add tests
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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