96e1e3f921
One 0-100 lever beside Window Translucency: 0 keeps your bubble solid (the default), 100 leaves only the outline. The store paints a single root var, --user-bubble-keep, that --dt-user-bubble mixes in, so the read-only bubble and the inline edit composer follow together and an untouched lever yields byte-identical CSS. Reuses TranslucencySlider (with its overlay peek), has a Cmd-K search entry, and copy in all six locales.