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-6-asset-generation/data/styles/design-styles/minimal.md

@@ -0,0 +1,26 @@
+# Minimal
+
+## Overview
+Clean, spacious design with maximum whitespace and restrained use of elements.
+
+## Visual Characteristics
+
+| Property | Value |
+|----------|-------|
+| **Whitespace** | Generous — elements breathe |
+| **Color palette** | Monochrome + one accent |
+| **Typography** | Sans-serif, thin to regular weight |
+| **Borders** | Hairline or none |
+| **Shadows** | None or very subtle |
+| **Imagery** | High-contrast, isolated subjects |
+| **Icons** | Line icons, consistent stroke width |
+
+## Prompt Keywords
+`minimal, clean, whitespace, simple, uncluttered, modern, restrained, elegant simplicity`
+
+## Best For
+- Portfolio sites, luxury brands, SaaS products, personal sites
+- Content-focused layouts where text is primary
+
+## Avoid
+- Dense data displays, e-commerce with many products, playful brands