Create standalone browser port of LTX Athena with authenticated native API transport

frontend/lib/genspace-last-frame.ts

@@ -0,0 +1,7 @@
+export function shouldShowLastFrameChip(params: {
+  mode: string
+  hasFirstFrame: boolean
+  duration: number | null
+}): boolean {
+  return params.mode === 'video' && params.hasFirstFrame && params.duration != null
+}