[FEATURE] Allow sub-agents to restart gracefully after network outage

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Consider scenario - I have launched a task, which spawned multiple sub-agents to work in parallel.
Because life happens - I needed to leave area covered with network (put laptop to sleep, daily commute) before agents stopped working. Agents work might be gone when I'm "back" into network.

Proposed Solution

Allow some sort of, may be, /sleep or something of sorts, where I can gracefully pause-resume all the work being done

Alternative Solutions

Suggest solution can happen automatically when CC detects some sort of "problem" like this all by itself

Priority

Medium - Would be very helpful

Feature Category

Other

Use Case Example

1. Start working - launch multiple sub-agents with long running tasks
2. Disconnect from network; allow sub-agents to fail in their own sessions (or just "close" laptop lid in many cases)
3. Wake the laptop back - see sub-agents are no longer "actively" running. Try reviving if possible. In many cases will not be possible. Some work might be lost

Additional Context

_No response_