[Feature Request] Add chat search functionality or export to temp file for review

Bug Description
Need search in a chat. (eg. I want to look back in my chat for something) I understand it's not easy to build in a TUI - (and TUI's probably suck for such type of interactions) - maybe export the chat to a temp file that I can open in editor of my choice?

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.1.39
• Feedback ID: 271c4025-5296-41da-9253-7f03d6ad6c62

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/curie-std/.local/share/claude/versions/2.1.39 (expected in multi-process scenarios)\n    at wVR (/$bunfs/root/claude:3626:2098)\n    at DjA (/$bunfs/root/claude:3626:1209)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-12T05:15:40.979Z"}]