feat: skill expansion — browser, security, SQL, files (16 skills total)

Novas skills instaladas:
- openclaw-agent-browser   v1.0.0  CLI Chromium — navegação, login, screenshots, state
- skill-security-audit    v1.0.0  SAST scanning, prompt injection, secrets audit
- sql-toolkit             v1.0.0  PostgreSQL/MySQL/SQLite — schema, query, otimização
- file                    v1.0.0  Organização de arquivos por contexto
- file-summary            v1.0.0  Extração e resumo de PDFs, Word, Excel

Workspace expandido:
- TOOLS.md: +Browser automation, Security audit, SQL, File management
- AGENTS.md: +Linux Analyst section (comandos, logs, rede, scripts) + Full-stack strategy
- MEMORY.md: 16 skills indexadas, stack map, comandos Linux ref
- SESSION-STATE.md: atualizado com contexto completo
- lock.json: sincronizado com 16 skills instaladas

skills/xcloud-docker-deploy/examples/nextjs-app.md

@@ -0,0 +1,41 @@
+# Example: Next.js App → xCloud via Docker
+
+## Project structure detected
+- package.json ✓
+- next.config.js ✓
+
+Detected: Next.js | Recommended: Docker (requires build step)
+
+## Step 1 — Add standalone output to next.config.js
+```js
+const nextConfig = { output: 'standalone' }
+module.exports = nextConfig
+```
+
+## Step 2 — Add Dockerfile
+Copy `dockerfiles/nextjs.Dockerfile` → rename to `Dockerfile` in repo root.
+
+## Step 3 — Add docker-compose.yml
+Copy `compose-templates/nextjs-postgres.yml` → rename to `docker-compose.yml`. Replace OWNER/REPO.
+
+## Step 4 — Add GitHub Actions
+Copy `assets/github-actions-build.yml` → `.github/workflows/docker-build.yml`
+
+## Step 5 — Add .env.example
+```env
+POSTGRES_DB=myapp
+POSTGRES_USER=myuser
+POSTGRES_PASSWORD=
+NEXTAUTH_URL=https://yourdomain.com
+NEXTAUTH_SECRET=
+```
+
+## Step 6 — Push and wait for GHCR build (~3-5 min)
+```bash
+git add . && git commit -m "Add xCloud deployment" && git push origin main
+```
+
+## Step 7 — Deploy in xCloud
+1. Server → New Site → Custom Docker
+2. Connect repo, exposed port: 3000
+3. Add env vars, Deploy