Add five new selectable themes alongside the existing Catppuccin Mocha
and Gruvbox Dark, each built through the shared buildAppTheme so they
stay visually consistent. Palettes are taken from each project's
official source; a few intermediate surface shades are interpolated
where the canonical palette omits them (noted in the theme files).
Register the new themes in main.dart and add their dropdown entries in
settings.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Frontend usability and aesthetics pass across web and mobile:
- Add shared layout tokens (theme/dimens.dart: Insets + Breakpoints) and
replace magic-number spacing and per-file breakpoint consts.
- Route both themes through buildAppTheme (theme/theme_builder.dart): explicit
useMaterial3 and a shared branded textTheme (Barlow Condensed for
display/headline/title styles); logo now reads its style from the theme.
- Move screen titles into the shared AppBar (route-derived) and drop the
redundant in-body headers; upgrade Settings buttons to M3 FilledButton.
- Add reusable EmptyState and skeleton loaders; Devices empty state links to
scanner status, notifications get filter-aware messages.
- Add a first-run welcome intro and Save-disabled helper text in Settings.
- Make device Filter/Sort adaptive: bottom sheet on phones, dialog on wide.
- Collapse the device-list filter chips and Sort/Filter buttons into one row;
rename the home Scanners card title and align its style.
Tests: add EmptyState/skeleton widget tests and Settings first-run cases;
update tests for the FilledButton swap and relocated titles. 89 passing,
dart analyze clean.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
