Complete UI/UX rewrite of hermes-mobile with Material You design system. Phase 1: Color/Theme/Type/Shapes/Spacing/Motion tokens Phase 2: HermesScaffold, StateViews (skeleton/empty/error), SearchBar, StatusBadge, ToggleRow Phase 3: Bottom nav + drawer navigation with NavigationController Phase 4: All 17 screens rewritten with HermesScaffold and Material You patterns Closes PR #3.