feat: design system overhaul — sidebar, AI chats, settings, brainstorm, color cleanup

- Sidebar: dynamic brand-accent colors, brainstorm section restyled
- AI chat general: popup panel with expand/collapse, hides when contextual AI open
- AI chat contextual: tabs reordered (Actions first), X close button, height fix
- Settings: all tabs restyled, 6 new color presets (sage, terracotta, iron, etc.)
- Global color cleanup: emerald/orange hardcoded → brand-accent dynamic
- Brainstorm page: orange → brand-accent throughout
- PageEntry animation component added to key pages
- Floating AI button: bg-brand-accent instead of hardcoded black
- i18n: all 15 locales updated with new AI/billing keys
- Billing: freemium quota tracking, BYOK, stripe subscription scaffolding
- Admin: integrated into new design
- AGENTS.md + CLAUDE.md project rules added

.agent/skills/wds-6-asset-generation/data/styles/content-styles/hyper-realistic.md

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+# Hyper-realistic
+
+## Overview
+Beyond photography — extreme detail, perfect lighting, idealized reality.
+
+## Rendering Characteristics
+
+| Property | Value |
+|----------|-------|
+| **Detail level** | Maximum — every pore, thread, reflection |
+| **Lighting** | Perfect studio or cinematic lighting |
+| **Texture** | Microscopic detail visible |
+| **Color** | Rich, enhanced but believable |
+| **Depth** | Shallow depth of field, bokeh |
+
+## Prompt Keywords
+`hyper-realistic, ultra-detailed, 8K, macro detail, cinematic lighting, photographic, sharp focus, professional photography`
+
+## Best For
+- Luxury brands, food photography, automotive, jewelry
+- Hero images that need to feel premium
+
+## Dimensions Guide
+- Hero: 2560x1440 or higher
+- Product: 1:1, high resolution
+- Detail shots: macro crop ratios