fix: UI upgrade - fix undefined status, CEO breadcrumb, platform cards, search

feat: CEO System Redesign - sidebar 10 to 3 tabs

fix: CEO Mode pass null agent to avoid history load errors

fix: CEO Mode use callAIWithFailover instead of direct API

feat: CEO Mode + Image Upload + Content Factory (Phase 1+2)

feat: Competitor Analysis + CSV Export + Mobile Responsive

feat: Content Planner 7D + Remix + Chat Search

feat: Dashboard Content Widget + Backup/Restore + Delete History

feat: Delete scheduled posts + Hashtag Generator + Content Score AI

feat: Content History + Calendar Scheduling + Preview real data

feat: 3 new features - Content Calendar, Templates Library (15), Multi-Platform Preview

fix: register content-studio in tabRenderers for proper tab switching

fix: 3 safe fixes - CSS loading animation, AI 30s timeout, duplicate key removal

feat: AI Auto-Workflow - chain 5 agents in sequence with live progress UI

feat: AI Content Powers - 7 AI generators for Content Studio agents (trend/audience/writer/hooks/visual/video/analysis)