[FEATURE] /resume should support filtering to named sessions only

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

Problem

/resume (and claude --resume) shows all past sessions in the picker, including unnamed ones. Users who name important sessions with -n / --name end up scrolling through many unnamed sessions to find the ones they care about.

Proposed Solution

Add a way to filter the /resume picker to only show named sessions. A few possible approaches:

• A --named-only flag: claude --resume --named-only
• A slash command variant: /resume --named
• A toggle within the interactive picker itself

Alternative Solutions

Power users who consistently name their sessions are signaling which sessions are worth returning to. The current picker treats all sessions equally, which makes the naming less useful as sessions accumulate.

Priority

Medium - Would be very helpful

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_