[FEATURE] statusline should update after compact

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 I run /compact the context bar doesn't update which leads to confusing UX behavior since that's the exact thing I'm looking to update. It only updates on the next time I send a message. Compact is a meaningful context update so the session should be refreshed

could be solved by #5685 but don't necessarily need such a heavy fix

Proposed Solution

something like /compact triggers a hook that reruns the status line script or #5685

Alternative Solutions

_No response_

Priority

Low - Nice to have

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_