- New Agentic OS logo: SVG hexagon with gradient (replaces unicode)
- Modern sidebar toggle: SVG chevron with 180° rotation animation
- Favicon: proper SVG favicon returning 200 with browser icon
- Agent status cache (15s TTL) eliminates slow subprocess on every status call
- Chat moved to top of sidebar nav (Primary section, before Dashboard)
- Reorganized sidebar: Primary > Agents > Management > System sections
- Glassmorphism card effects with gradient overlays
- Stat values with gradient text, enhanced stat icons with glow
- Button micro-interactions: scale, shadow, gradient overlay on hover
- Table polish: better row transitions, border-spacing
- Chat sidebar: active agent indicator, hover animations
- Gradient logo text matching SVG accent
- All 13 pages verified 200, zero console errors
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