/clear should preserve session name and color

Problem

/clear resets the session name (set via /rename) and color (set via /color), forcing users to re-run those commands after every context clear.

Expected behavior

/clear should only clear conversation history/context, not session metadata like name and color.

Current workaround

Re-run /rename and /color after every /clear.

Why it matters

When working on multiple sessions, name and color are used to visually distinguish them. Having to re-set them after every context clear adds friction to the workflow.