Add design thinking components for project management

- Add PhaseNavigator with 5 design phases (Empathize, Define, Ideate, Prototype, Test)
- Add HealthWidget with circular progress and metrics
- Add BacklogBoard with WSJF prioritization display
- Add RecommendationsWidget for AI-powered insights
- Add Tooltip component (shadcn/ui)
- Add design-thinking types with phase configs and backlog item structure

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package.json

@@ -17,6 +17,7 @@
     "@radix-ui/react-slot": "^1.2.4",
     "@radix-ui/react-switch": "^1.2.6",
     "@radix-ui/react-tabs": "^1.1.13",
+    "@radix-ui/react-tooltip": "^1.2.8",
     "@stripe/stripe-js": "^8.5.3",
     "@supabase/ssr": "^0.8.0",
     "@supabase/supabase-js": "^2.87.1",