Enforce one voice across every screen: column and section headers are
UPPERCASE, menu items are Capitalized buttons, and short descriptions
drop their trailing period (with real ellipses instead of "...").
Tools gain a display `title` separate from their kebab-case CLI name,
so a menu item now reads exactly like the screen it opens ("Device
configuration" opens Device configuration) and result windows inherit
the same name. Every sub-screen backs out via a "Back" row below a
blank separator (the config editor was missing both; its Close is now
Back, spelling out the discard when changes are staged), while the main
menu and device picker keep "Quit". Panel and dialog titles now wear a
brighter tint of their border colour via new title.* theme styles.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>