Phase 2 splits the remaining large Main.qml blocks into StationCard,
WorldCategories, WorldCategoryHeader, PlayerBar, and AboutDialog.
Main.qml is now ~414 lines (down from ~1240); behavior unchanged.
Split the duplicated desktop/compact header UI into reusable QML
components (HeaderNavigation, SearchToolbar, QuickFilters), centralize
colors and world tags in BearTheme singleton, and move flag emoji logic
to FlagUtils.js. Register modules via qrc import path qrc:/qml.
Main.qml shrinks from ~1816 to ~1240 lines; behavior unchanged.
