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/playful.md

@@ -0,0 +1,26 @@
+# Playful
+
+## Overview
+Fun, energetic design with bold colors, rounded shapes, and a sense of joy.
+
+## Visual Characteristics
+
+| Property | Value |
+|----------|-------|
+| **Whitespace** | Moderate — lively but not cramped |
+| **Color palette** | Vibrant, multi-color, saturated |
+| **Typography** | Rounded, bold, sometimes quirky display fonts |
+| **Borders** | Rounded corners, chunky outlines |
+| **Shadows** | Colorful or offset shadows |
+| **Imagery** | Illustrations, cartoons, bright photography |
+| **Icons** | Filled, colorful, sometimes animated |
+
+## Prompt Keywords
+`playful, fun, colorful, energetic, vibrant, cheerful, friendly, whimsical, bouncy`
+
+## Best For
+- Children's products, games, education, creative tools, food delivery
+- Brands targeting younger audiences or wanting to feel approachable
+
+## Avoid
+- Luxury, finance, healthcare, legal services