Restore project-grouped chat navigation in the Codex desktop sidebar

What variant of Codex are you using?

App

What feature would you like to see?

Please add a supported sidebar view that groups chats under their projects, or restore the previous project-first hierarchy as an option.

After a recent desktop app update, the sidebar changed from a compact project-grouped layout such as:

Project A
  Chat 1
  Chat 2
  Chat 3

to a flat chat list that repeats the project name under every chat:

Chat 1
  Project A
Chat 2
  Project A
Chat 3
  Project A

For users who keep many chats in the same project, the new layout uses substantially more vertical space and is harder to scan. Repeating the same project label for every row adds visual noise without adding useful information.

Ideally, the sidebar would provide a clearly discoverable option such as Group by project, with:

• Each project name displayed once
• Expandable and collapsible project groups
• Chats listed beneath their project
• Priority or chronological sorting available within each project
• The current flat list retained as an optional view

Expected behavior:

Project A
  Chat 1
  Chat 2

Project B
  Chat 3
  Chat 4

Current behavior:

Chat 1
  Project A
Chat 2
  Project A
Chat 3
  Project B
Chat 4
  Project B

Additional information

• Codex desktop app version: 26.727.40816
• Platform: macOS
• The current UI does not expose a discoverable control for restoring the previous project-grouped sidebar.
• No data appears to be lost; this request is specifically about navigation density and information hierarchy.