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/bmad-create-architecture/steps/step-07-validation.md

@@ -227,37 +227,39 @@ Prepare the content to append to the document:
 
 ### Architecture Completeness Checklist
 
-**✅ Requirements Analysis**
+Mark each item `[x]` only if validation confirms it; leave `[ ]` if it is missing, partial, or unverified. Any unchecked item must be reflected in the Gap Analysis above and in the Overall Status below.
 
-- [x] Project context thoroughly analyzed
-- [x] Scale and complexity assessed
-- [x] Technical constraints identified
-- [x] Cross-cutting concerns mapped
+**Requirements Analysis**
 
-**✅ Architectural Decisions**
+- [ ] Project context thoroughly analyzed
+- [ ] Scale and complexity assessed
+- [ ] Technical constraints identified
+- [ ] Cross-cutting concerns mapped
 
-- [x] Critical decisions documented with versions
-- [x] Technology stack fully specified
-- [x] Integration patterns defined
-- [x] Performance considerations addressed
+**Architectural Decisions**
 
-**✅ Implementation Patterns**
+- [ ] Critical decisions documented with versions
+- [ ] Technology stack fully specified
+- [ ] Integration patterns defined
+- [ ] Performance considerations addressed
 
-- [x] Naming conventions established
-- [x] Structure patterns defined
-- [x] Communication patterns specified
-- [x] Process patterns documented
+**Implementation Patterns**
 
-**✅ Project Structure**
+- [ ] Naming conventions established
+- [ ] Structure patterns defined
+- [ ] Communication patterns specified
+- [ ] Process patterns documented
 
-- [x] Complete directory structure defined
-- [x] Component boundaries established
-- [x] Integration points mapped
-- [x] Requirements to structure mapping complete
+**Project Structure**
+
+- [ ] Complete directory structure defined
+- [ ] Component boundaries established
+- [ ] Integration points mapped
+- [ ] Requirements to structure mapping complete
 
 ### Architecture Readiness Assessment
 
-**Overall Status:** READY FOR IMPLEMENTATION
+**Overall Status:** {{READY FOR IMPLEMENTATION | READY WITH MINOR GAPS | NOT READY}} (choose READY FOR IMPLEMENTATION only when all 16 checklist items are `[x]` and no Critical Gaps remain; choose NOT READY when any Critical Gap is open or any Requirements Analysis or Architectural Decisions item is unchecked; otherwise READY WITH MINOR GAPS)
 
 **Confidence Level:** {{high/medium/low}} based on validation results