fix(dashboard): add RH KPIs to DEFAULT_LAYOUT for correct reset sizing
The 3 RH KPI widgets were missing from DEFAULT_LAYOUT, so clicking "Restablecer" left them with wrong dimensions. Added them as row 3 (y:4, w:3, h:2) matching Finanzas KPIs. Shifted all subsequent widget y-positions by +2 to accommodate the new row.
Co-Authored-By: Claude Opus 4.6 (1M context) noreply@anthropic.com