[Bug] Chat width reduces when scrolling up in terminal output

Bug Description
Your tmux scroll behavior is cuasing the width of chat to be halved as soon as you scroll up more than maybe 100 lines.

<img width="781" height="836" alt="Image" src="https://github.com/user-attachments/assets/343b905c-c1ca-4098-8736-45ad0633dbaa" />

Environment Info

• Platform: darwin
• Terminal: tmux
• Version: 2.1.132
• Feedback ID: 5952db13-e1ff-4940-9241-151dbc673d1e

Errors

[{"error":"Error: EACCES: permission denied, open '/Users/silasrhyneer/Code/northlight/.claude/settings.local.json'\n    at openSync (unknown)\n    at readSync (/$bunfs/root/src/entrypoints/cli.js:55:1177)\n    at fH_ (/$bunfs/root/src/entrypoints/cli.js:127:16270)\n    at bp (/$bunfs/root/src/entrypoints/cli.js:128:181)\n    at DR (/$bunfs/root/src/entrypoints/cli.js:130:54)\n    at sP4 (/$bunfs/root/src/entrypoints/cli.js:190:10174)\n    at ni (/$bunfs/root/src/entrypoints/cli.js:190:9256)\n    at _24 (/$bunfs/root/src/entrypoints/cli.js:191:2387)\n    at ub (/$bunfs/root/src/entrypoints/cli.js:191:3298)\n    at u8 (/$bunfs/root/src/entrypoints/cli.js:191:2847)","timestamp":"2026-05-07T16:34:04.100Z"},{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/silasrhyneer/.local/share/claude/versions/2.1.132 (expected in multi-process scenarios)\n    at I96 (/$bunfs/root/src/entrypoints/cli.js:2651:2257)\n    at ZRH (/$bunfs/root/src/entrypoints/cli.js:2651:1337)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-07T16:34:04.182Z"}]