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World-class discovery specification (design phase, no code): - Executive summary, architecture review, competitor + user research - UX/UI redesign + design system + themes, flagship search redesign - AI strategy (local Ollama, RTX 3080) + feature catalogue - Technical architecture, roadmap (MVP->v3), git plan, risks - Multi-provider platform: IEmailProvider abstraction, OAuth-as-login, unified DB schema, settings + feature flags, admin/RBAC, security model, 6-phase implementation plan, migration guide Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>