[BUG] Chat UI content cut off on both sides unless window is at minimum size

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Description:
The chat message content is clipped on both the left and right edges of the viewport. Messages get truncated mid-word (e.g., "ort a problem" instead of "report a problem", "is at" instead of "this is at") unless I shrink the window down to its minimum size. This has persisted across the last 5 updates

<img width="936" height="945" alt="Image" src="https://github.com/user-attachments/assets/58fa5e98-7597-4b33-9d44-97ccdc2b2834" />

Claude Code version: 2.1.71
App: Claude Code desktop (macOS)
OS: macOS 14.7.4 (23H420)
Machine: MacBook Pro (MacBookPro15,1), 6-Core Intel Core i7 @ 2.6 GHz, 16 GB RAM
Display: Built-In Retina LCD, 2880 x 1800
GPU: Intel UHD Graphics 630 / Radeon Pro 560X
Node: v24.14.1

What Should Happen?

Expected: Chat content should fit within the visible window and wrap/scroll properly at any window size.

Actual: Content extends beyond the left and right viewport edges and gets visually clipped. Only fits when the window is at its minimum width.

Error Messages/Logs

Steps to Reproduce

Steps to reproduce:

Open Claude Code desktop app
Resize window to any size larger than minimum
Open a chat session
Observe message content is cut off on both sides
Screenshot: [attach the image you just shared]

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.71

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_