v0.30.4

• Use plain English across setup, history, chat, robot controls, files, skills,
  scheduled reviews, updates and the browser. Explain what happened and what
  to do next. Keep each agent's permission names and behavior.
• Simplify the resume page and explain saved conversations when they open.
• Record separate shutdown times for pending robot work, the agent and resource
  cleanup in the service log, so a slow stop can be traced to the right step.