Buttons: the per-location Save changes / Delete location buttons had no icons,
unlike the apps-config action buttons. Add a save (floppy) icon and a trash
icon so they match the reference; colour comes from the nebula button groups
they already belong to.
Theme refactor: move the theme-specific [data-theme="nebula"] button/topbar/CTA
rules out of the shared css/themes.css and into themes/nebula/theme.css, where
the README says theme overrides belong. css/themes.css keeps only the generic,
non-theme-scoped defaults (solid status/accent buttons, danger-zone,
warning-banner) shared by dark-blue/light. No behaviour change: the nebula file
loads after css/themes.css so the moved rules still win.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>
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