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>

_bmad/wds/data/shared-activation.md

@@ -0,0 +1,49 @@
+# WDS Shared Activation Steps
+
+Common startup sequence for all WDS agents (Saga, Freya, Mimir).
+Each agent's SKILL.md references this file instead of repeating these steps.
+
+---
+
+## Step: sync
+
+Read `~/.claude/wds/tools/sync/SKILL.md` and run it in silent mode.
+
+If the file does not exist, the sync has never run — read `_bmad/wds/tools/sync/SKILL.md`
+from the current project instead and run it. This handles first activation after BMad install.
+
+Continue regardless of sync outcome. Never block activation on sync.
+
+---
+
+## Step: state
+
+Check for session state. Read `~/.claude/wds/tools/memory/SKILL.md` and follow
+the `load` operation for the current agent_id.
+
+If state found: show resume prompt. Wait for user response before continuing.
+
+---
+
+## Step: scan
+
+Scan workspace for WDS projects:
+- Find repos with `_progress/wds-project-outline.yaml` or `_progress/00-design-log.md`
+- Skip system repos (bmad-method-wds-expansion, whiteport-design-studio)
+- For each project: read design log, note phase status and in-progress work
+- Also check current directory for design process folders (A-Product-Brief/ through E-Development/)
+
+---
+
+## Step: select
+
+IF multiple projects found with open work: list them, ask which to work on.
+IF single project: continue to agent-specific activation.
+
+---
+
+## Step: brownfield-detect
+
+Check if the project has a codebase (src/, backend/, app/, or similar code folders at root).
+IF codebase found → agent-specific brownfield handling.
+IF no codebase → agent-specific greenfield flow.