Replace raw Fluent defaults + inline hex with a semantic design system,
themed for both light/dark (follows system variant).
- Styles/Theme.axaml: semantic brushes (surface/text/border/status) per
variant via ThemeDictionaries; override Fluent SystemAccentColor to brand
blue (#2563EB) and ControlCornerRadius=8; blue->indigo balance gradient.
- Styles/Controls.axaml: reusable classes (card, balance-hero, chip, ghost),
type scale (amount with tabular figures, mono, h1, label), button/input
polish, tab selected-in-blue, list hover/selected tints, card hover-lift.
- MainView: balance shown as gradient hero card; dashboard tabs use Material
SVG Path icons (Fill tracks TabItem selection) instead of Unicode glyphs;
all hardcoded colors (LimeGreen/IndianRed/Orange/Gray/#99000000) and
generic Fluent surface brushes mapped to semantic tokens; app background,
stronger modal scrim, status bar top border.
Palette derived from the logo (blue=trust, green=money). Build clean, app
starts with no binding errors.
davide