Sidebar: replace manual (incf y) tracking with flat list construction.
sidebar-lines returns (text . color-key) pairs; view-sidebar loops
over them. Version footer stays at h-2. No more fragile y arithmetic.
Input panel: use cl-tty.input text-input's render method instead of
manual word-wrap + cursor-position computation. Layout node set each
frame for dynamic position.
Chat: extract msg->pairs (message to renderable lines) and render-pair
(draw one line pair) as separate functions. Replace reverse-iteration
scroll culling with forward scan that skips by scroll-offset. Same
behavior, less nesting.
Amr Gharbeia
9492e00318