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

.claude/skills/wds-2-trigger-mapping/templates/feature-impact.template.md

@@ -0,0 +1,47 @@
+# Feature Impact Analysis: {{project_name}}
+
+## Scoring
+
+**Primary Persona (⭐):** High = 5 pts | Medium = 3 pts | Low = 1 pt  
+**Other Personas:** High = 3 pts | Medium = 1 pt | Low = 0 pts
+
+**Max Possible Score:** {{max_score}} (with {{persona_count}} personas)  
+**Must Have Threshold:** {{must_have_threshold}}+ or Primary High (5)
+
+---
+
+## Prioritized Features
+
+| Rank | Feature | Score | Decision |
+| ---- | ------- | ----- | -------- |
+
+{{#each sorted_features}}
+| {{this.rank}} | {{this.name}} | {{this.score}} | {{this.decision}} |
+{{/each}}
+
+---
+
+## Decisions
+
+**Must Have MVP (Primary High OR Top Tier Score):**
+{{#each must_have}}
+
+- {{this.name}} ({{this.score}})
+  {{/each}}
+
+**Consider for MVP:**
+{{#each consider}}
+
+- {{this.name}} ({{this.score}})
+  {{/each}}
+
+**Defer (Nice-to-Have or Low Strategic Value):**
+{{#each defer}}
+
+- {{this.name}} ({{this.score}})
+  {{/each}}
+
+---
+
+_Generated with Whiteport Design Studio framework_  
+_Strategic input for Phase 4: UX Design and Phase 6: PRD/Development_