Adjust ad positioning on article pages for better display

Modify `PageSideAds` component to accept `contentHalfWidth` prop for dynamic ad placement based on content container width, and update specific pages (article, about, datenschutz, empfang, impressum, search) to pass the correct values.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 23852c00-4779-460a-9e0c-d09fee4b6c92
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: a7feb44f-676a-4a21-8ede-a392a39b3b56
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/f209e72a-0939-48fa-84fc-57854de71967/23852c00-4779-460a-9e0c-d09fee4b6c92/nlGTLC9
Replit-Helium-Checkpoint-Created: true

client/src/pages/datenschutz.tsx

@@ -9,7 +9,7 @@ export default function DatenschutzPage() {
   return (
     <div className="min-h-screen bg-background">
       <Header />
-      <PageSideAds />
+      <PageSideAds contentHalfWidth={384} />
       <main className="max-w-3xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
         <div className="flex items-center gap-3 mb-8">
           <Shield className="w-7 h-7 text-primary" />