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>

.claude/skills/wds-6-asset-generation/data/styles/content-styles/flat-design.md

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+# Flat Design
+
+## Overview
+No gradients, shadows, or 3D effects — pure shapes, clean colors, geometric simplicity.
+
+## Rendering Characteristics
+
+| Property | Value |
+|----------|-------|
+| **Detail level** | Low — maximally simplified |
+| **Lighting** | None — flat color fills |
+| **Texture** | None — smooth, uniform |
+| **Color** | Solid fills, limited palette |
+| **Depth** | None — purely 2D |
+
+## Prompt Keywords
+`flat design, flat illustration, minimalist, geometric, solid colors, no shadows, 2D, clean shapes`
+
+## Best For
+- UI elements, icons, infographics, onboarding illustrations
+- Fast-loading assets, scalable graphics
+
+## Dimensions Guide
+- Icons: 24x24 to 256x256
+- Illustrations: variable
+- Infographics: full-width