chore: initial monorepo scaffold + WDS Phase 1+2 artifacts

- Nx 22.7 monorepo (pnpm 11.1, TypeScript 5.9, Node 24)
- apps/api: NestJS 11 (CJS conforme CODING-RULES.md PGD-DB-004)
- apps/web: React 19 + Vite 8 (ESM)
- libs/shared/api-interface: Zod contract base
- Docker Compose dev: Postgres 18, Valkey 8, MinIO, Mailpit
- WDS artifacts:
  - design-artifacts/A-Product-Brief/ (5 docs canônicos + 16 dialogs)
  - design-artifacts/B-Trigger-Map/ (hub + 4 personas + feature impact)
- Stack canon: STACK.md v2.2 + CODING-RULES.md v2.0 + brand.md
- AGENTS.md + README.md como entrada para devs/agentes

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.agents/skills/wds-4-ux-design/data/scenario-init/examples/saas-example.md

@@ -0,0 +1,64 @@
+# Example: SaaS (Subscription Goal)
+
+**Frictionless onboarding**
+
+---
+
+## The 5 Questions
+
+### 1. Core Feature
+
+```
+"Quick setup wizard - gets users to first success fast"
+```
+
+### 2. Entry Point
+
+```
+"ChatGPT recommendation"
+```
+
+### 3. Mental State
+
+```
+"Overwhelmed by current tools, need simple solution that just works"
+```
+
+### 4. Mutual Success
+
+```
+Business: Active monthly subscription
+User: Problem solved, no complexity added
+```
+
+### 5. Shortest Path
+
+```
+ChatGPT → Landing → See demo → Sign up →
+Quick setup → First success
+```
+
+---
+
+## Scenario Captured
+
+```
+SCENARIO: Frictionless Onboarding
+
+START: ChatGPT recommendation (overwhelmed, need simplicity)
+END: First success (problem solved, staying subscribed)
+
+CRITICAL PATH:
+1. Landing → Understand it's simple
+2. Demo → See it in action
+3. Sign up → Low friction entry
+4. Quick setup → Minimal configuration
+5. First success → Immediate value
+
+BUSINESS GOAL: Monthly subscription
+USER GOAL: Problem solved without complexity
+```
+
+---
+
+[← Back to Guide](../00-SCENARIO-INIT-GUIDE.md)