Make page headers transparent and float with scrolling

Update header background to be transparent in FolxStadlPage, VideoPage, and Home pages.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 074b0e4c-6171-43bd-aa98-f9e04623ca14
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/074b0e4c-6171-43bd-aa98-f9e04623ca14/lK7HRF1

client/src/pages/home.tsx

@@ -76,7 +76,7 @@ export default function Home() {
   return (
     <div className="min-h-screen bunny-dark static-triangles">
       {/* Header */}
-      <div className="border-b border-white/5 bg-black/5 backdrop-blur-sm relative overflow-hidden">
+      <div className="border-b border-white/5 bg-transparent backdrop-blur-sm relative overflow-hidden">
         <div className="max-w-7xl mx-auto px-4 py-4">
           <div className="flex items-center justify-between">
             {/* Left side - Logo */}