feat(ui): apply Justine ink & parchment design system

- Map Justine tokens to shadcn CSS variables (--vibn-* aliases)
- Switch fonts to Inter + Lora via next/font (IBM Plex Mono for code)
- Base typography: body Inter, h1–h3 Lora; marketing hero + wordmark serif
- Project shell and global chrome use semantic colors
- Replace Outfit/Newsreader references across TSX inline styles

Made-with: Cursor

components/project-creation/FreshIdeaSetup.tsx

@@ -47,7 +47,7 @@ export function FreshIdeaSetup({ workspace, onClose }: SetupProps) {
   return (
     <div style={{ padding: "32px 36px 36px" }}>
       <div style={{ display: "flex", alignItems: "center", justifyContent: "space-between", marginBottom: 28 }}>
-        <div style={{ fontSize: "1.15rem", fontWeight: 600, color: "#1a1a1a", fontFamily: "Newsreader, serif" }}>
+        <div style={{ fontSize: "1.15rem", fontWeight: 600, color: "#1a1a1a", fontFamily: "var(--font-lora), ui-serif, serif" }}>
           New project
         </div>
         <button