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-0-project-setup/templates/folder-guides/00-design-log.template.md

@@ -0,0 +1,59 @@
+# Design Log
+
+**Project:** {{project_name}}
+**Started:** {{date}}
+**Method:** Whiteport Design Studio (WDS)
+
+---
+
+## Backlog
+
+> Business-value items. Add links to detail files if needed.
+
+- [ ] Complete product brief — Phase 1
+- [ ] Define trigger map — Phase 2
+- [ ] Create user scenarios — Phase 3
+
+---
+
+## Current
+
+| Task | Started | Agent |
+|------|---------|-------|
+| — | — | — |
+
+**Rules:** Mark what you start. Complete it when done (move to Log). One task at a time per agent.
+
+---
+
+## Design Loop Status
+
+> Per-page design progress. Updated by agents at every design transition.
+
+| Scenario | Step | Page | Status | Updated |
+|----------|------|------|--------|---------|
+
+**Status values:** `discussed` → `wireframed` → `specified` → `explored` → `building` → `built` → `approved` | `removed`
+
+**How to use:**
+- **Append a row** when a page reaches a new status (do not overwrite — latest row per page is current status)
+- **Read on startup** to see where the project stands and what to suggest next
+
+---
+
+## Log
+
+### {{date}} — Project initialized (Phase 0)
+- Type: {{greenfield/brownfield}}
+- Complexity: {{product_complexity}}
+- Tech stack: {{tech_stack}}
+
+---
+
+## About This Folder
+
+- **This file** — Single source of truth for project progress
+- **agent-experiences/** — Compressed insights from design discussions (dated files)
+- **wds-project-outline.yaml** — Project configuration from Phase 0 setup
+
+**Do not modify `wds-project-outline.yaml`** — it is the source of truth for project configuration.