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/templates/instructions/meta-content.instructions.md

@@ -0,0 +1,37 @@
+# Meta Content & Social Sharing
+
+**Include when:** Page is Public (SEO/social sharing needed)
+
+---
+
+## Page Title
+**Limit:** 55-60 characters
+
+`{title}`
+
+---
+
+## Meta Description
+**Limit:** 150-160 characters
+
+`{description}`
+
+---
+
+## Social Sharing
+
+| Property | Value |
+|----------|-------|
+| Title | {60-70 chars, can differ from page title} |
+| Description | {120-150 chars} |
+| Image | 1200x630px, `/images/social/{page-name}.jpg` |
+| Image Alt | {alt text} |
+
+---
+
+## Agent Questions
+
+1. "What should appear in browser tab/search results?" (< 60 chars)
+2. "Describe this page to encourage clicks" (150-160 chars)
+3. "What title for social shares?"
+4. "What image represents this page?" (1200x630px)