Feature request: Session Manager UI for browsing and resuming conversations

Problem

When using claude --resume, sessions are displayed as fragmented chunks with minimal context. It's difficult to:

1. Find a specific conversation — you have to scroll through a flat list of session IDs with truncated first messages
2. Understand what a session was about — no grouping by project, no topic summary
3. Manage sessions — no way to rename, archive, delete, or organize them
4. Resume efficiently — you need to copy the session ID and paste it manually

For power users who run multiple Claude Code sessions daily across several projects, this becomes a real friction point.

Proposed Solution

A session browser — either built into the CLI or as a companion UI — that provides:

Core features

• Group sessions by project directory — show which repo/folder each session belongs to
• Show conversation topic — derive from the first user message or allow manual naming
• Quick resume — select a session and open it in a new terminal tab
• Search — filter sessions by keywords, date range, or project

Nice to have

• Session timeline — show when sessions happened on a calendar/timeline view
• Merge related sessions — combine fragmented sessions that are part of the same task
• Tags/labels — manually categorize sessions
• Export — export a session as markdown

Current Workaround

Manually running claude --resume and scrolling through the list, or digging through ~/.claude/projects/ JSON files.

Context

As Claude Code usage grows (especially with corporate teams), session management becomes increasingly important. The current --resume flow works for occasional use but doesn't scale for daily heavy usage across multiple projects.