fix(codebase): remove duplicate THEME definition causing build failure

vibn-frontend/app/[workspace]/project/[projectId]/(home)/code/page.tsx

@@ -282,19 +282,9 @@ function statusColor(status: string) {
 // Tokens
 // ──────────────────────────────────────────────────
 
-const THEME = {
-  ink: "#111827",
-  mid: "#4b5563",
-  muted: "#9ca3af",
-  border: "#e5e7eb",
-  borderSoft: "#f3f4f6",
-  cardBg: "#fff",
-  fontSans: '"Inter", ui-sans-serif, system-ui, -apple-system, sans-serif',
-} as const;
-
 const pageWrap: React.CSSProperties = {
   padding: "28px 48px 48px",
-  fontFamily: THEME.fontSans,
+  fontFamily: THEME.font,
   color: THEME.ink,
 };
 const grid: React.CSSProperties = {