fix: center the loading placeholder on an a switch

wttrin-query inserted the "Loading weather for ..." placeholder but never centered it, leaving that to window-configuration-change-hook. On an `a` switch the *wttr.in* buffer is already displayed, so the hook doesn't fire. The placeholder kept the previous weather block's window margin and rendered off-center until the new weather arrived.

I moved the placeholder rendering into wttrin--render-loading-placeholder, which centers it explicitly via wttrin--update-layout. It no longer depends on the hook, so the placeholder is centered on the first open and through every switch.

0 files changed, 0 insertions, 0 deletions