Warn when Caps Lock is on at the Plymouth password prompt

[TomWor]

The disk unlock prompt is the one place Omarchy asks for a password with no feedback beyond bullets, and Caps Lock is invisible there. The initramfs runs the console keymap, where the key does what it says, while the desktop it boots into remaps it to Compose (default/hypr/input.lua), so nothing in daily use teaches the habit of avoiding it. A stray press means retyping the passphrase with no hint about why it was refused.

Plymouth's script plugin reports the keyboard's Caps Lock state through Plymouth.GetCapslockState(). Poll it from the refresh callback while the password dialog is showing and, when it is set, show a warning triangle and "Caps Lock is on" centred under the entry field. The label is rendered lazily, so a boot that never has Caps Lock on never loads the label plugin, and every call is guarded so a plymouthd without GetCapslockState, or a theme directory without warning.png, leaves the prompt exactly as it was.

The warning follows the theme. warning.png joins bullet.png, entry.png, lock.png and progress_bar.png in the set of assets omarchy-plymouth-set recolours to the theme's foreground, and the label colour lives in three text_color lines at the top of the script that the publisher rewrites next to the background colours. The packaged assets stay Tokyo Night, so a fresh install matches before any theme is set.

warning.png is added to the publisher's allowlist and the test's copy of it, and the test now also checks that the script receives the selected text colour. Verified at the unlock prompt of an encrypted install on Plymouth 26.134.222.

IMG_3109.mp4