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/references/xcloud-native-nodejs.md

@@ -0,0 +1,48 @@
+# xCloud Native Node.js Deployment
+
+## Repository Setup (Required)
+
+package.json must have a `start` script:
+```json
+{
+  "scripts": {
+    "start": "node server.js",
+    "build": "tsc -p tsconfig.json"
+  }
+}
+```
+
+Port must use process.env.PORT:
+```javascript
+const port = process.env.PORT || 3000;
+app.listen(port, () => console.log(`Server running on port ${port}`));
+```
+
+xCloud injects PORT automatically. Your app MUST listen on this port.
+
+.env.example:
+```env
+NODE_ENV=production
+PORT=3000
+DATABASE_URL=
+JWT_SECRET=
+```
+
+## xCloud UI Steps
+
+1. Server → New Site → Node.js tab
+2. Connect Git repo
+3. Set branch
+4. Node.js version: 18, 20, or 22
+5. Start command: `npm start` (or `node server.js`)
+6. Build command (if TypeScript): `npm run build`
+7. Add environment variables
+8. Click Deploy
+
+## Common Issues
+
+| Issue | Fix |
+|---|---|
+| App crashes on start | Check PORT env var is used (not hardcoded) |
+| Module not found | Ensure node_modules is in .gitignore |
+| TypeScript errors | Add build script, set build command in xCloud |