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

.agents/skills/wds-4-ux-design/data/scenario-init/06-shortest-path.md

@@ -0,0 +1,92 @@
+# Question 5: What's the Shortest Path?
+
+**Map the minimum journey from starting point to mutual success**
+
+---
+
+## The Question
+
+```
+Agent: "Let's map the shortest possible journey from
+        [starting point] to [mutual success]:
+
+        What's the absolute minimum path?"
+```
+
+---
+
+## Why This Matters
+
+Shortest path means:
+
+- No unnecessary steps
+- No feature bloat
+- Clear focus
+- Faster to mutual success
+
+**Every extra step is a chance to lose the user.**
+
+---
+
+## Example: Dog Week
+
+```
+Agent: "From 'frustrated parent on Google' to 'active subscription + harmony':
+        What's the minimum path?"
+
+Designer: "Google → Landing page → See how it works →
+           Sign up → Set up family → Start using calendar →
+           First walk completed → Everyone happy"
+```
+
+**Why this path:**
+
+- Landing: Understand solution (addresses frustration)
+- How it works: See it's simple (addresses complexity fear)
+- Sign up: Commit to trying (low friction)
+- Family setup: Get everyone involved (necessary for accountability)
+- Calendar: Plan first week (immediate action)
+- First walk: Proof it works (mutual success moment)
+
+---
+
+## What Agent Captures
+
+```
+SCENARIO: Parent Onboarding to First Success
+
+START: Google search (frustrated, tired of nagging)
+END: First walk completed (harmony, system working)
+
+CRITICAL PATH:
+1. Landing page → Understand solution
+2. Sign up → Commit to trying
+3. Family setup → Get everyone involved
+4. Calendar → Plan first week
+5. First walk → Proof it works
+
+BUSINESS GOAL: Active subscription
+USER GOAL: Family harmony without nagging
+
+Each step serves the journey. Nothing extra.
+```
+
+---
+
+## Next Step
+
+With all 5 questions answered, you have:
+
+- ✅ Core feature (what to design)
+- ✅ Entry point (where to start)
+- ✅ Mental state (how they feel)
+- ✅ Mutual success (where to end)
+- ✅ Shortest path (how to get there)
+
+**→ Proceed to [Step 7: Reference Trigger Map](07-reference-trigger-map.md)**
+
+Before sketching, identify the relevant Trigger Map context for this scenario.
+
+---
+
+[← Back to Guide](00-SCENARIO-INIT-GUIDE.md)