[FEATURE] Highlight renamed conversations in /resume

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

Being able to /rename conversations is useful, but it should be easier to identify renamed conversations from non-renamed ones when running /resume, particularly since the regression identified in https://github.com/anthropics/claude-code/issues/46445.

Proposed Solution

Renamed conversations could be highlighted in the list of past conversations when running /rename. The highlighting in question could be similar to how hyperlinks are highlighted.

Alternative Solutions

_No response_

Priority

Low - Nice to have

Feature Category

Interactive mode (TUI)

Use Case Example

_No response_

Additional Context

_No response_