Fixing Keyboard Input in tmux

Two independent things happened that drove me to reconsider my terminal workflow.

First, I started relying more and more on Claude Code as my AI coding assistant running inside the terminal. Shift+Enter (for inserting newlines without submitting) didn’t work inside tmux, so I had to use a workaround. It was annoying, but acceptable.

Then I switched to a 96-key keyboard with dual Bluetooth, because I wanted a single keyboard that can switch between two computers. That’s when my tmux scrollback navigation broke too. With two things broken, I decided to look deeper into both issues and understand what’s actually going on.