chore(themes): add new themes api v2, add in-app theme editor/creator, macos compatibility, fix asset loading, rework settings and setup wizard

src/lib/themeFonts.ts

@@ -0,0 +1,18 @@
+export type ThemeFontChoice = {
+  label: string;
+  family: string;
+  category: 'Sans' | 'Serif' | 'Display' | 'Mono' | 'Custom';
+};
+
+/** Fonts bundled with the launcher through @fontsource. */
+export const BUNDLED_THEME_FONTS: ThemeFontChoice[] = [
+  { label: 'Sora', family: 'Sora Variable', category: 'Sans' },
+  { label: 'Montserrat', family: 'Montserrat Variable', category: 'Sans' },
+  { label: 'Bebas Neue', family: 'Bebas Neue', category: 'Display' },
+  { label: 'Playfair Display', family: 'Playfair Display Variable', category: 'Serif' },
+  { label: 'Space Mono', family: 'Space Mono', category: 'Mono' },
+  { label: 'JetBrains Mono', family: 'JetBrains Mono Variable', category: 'Mono' },
+];
+
+export const fontStack = (family: string | undefined, fallback = 'Sora Variable') =>
+  `"${(family || fallback).replace(/["\\]/g, '\\$&')}", ui-sans-serif, system-ui, sans-serif`;