[FEATURE] Do not store empty sessions.

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

When resuming sessions, there can be a lot of noise if previous sessions had no work in them.

Proposed Solution

It would be nice if an empty session was either not stored under ~/.claude/projects or not presented in the /resume list.

Alternative Solutions

_No response_

Priority

Low - Nice to have

Feature Category

CLI commands and flags

Use Case Example

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Additional Context

_No response_