fix(preventivo): slide deck 100vh — nessuno scroll di pagina

- ProposalDeck: outer div h-screen overflow-hidden, content wrapper h-full
- Rimosso il div interno ridondante min-h-screen
- useEffect blocca body overflow mentre la deck è aperta
- Tutti i 20 componenti slide: min-h-screen → h-full

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/public/proposal/sections/StrategistSection.tsx

@@ -5,7 +5,7 @@ type Props = { consultant: ConsultantProfile };
 
 export function StrategistSection({ consultant }: Props) {
   return (
-    <div className="min-h-screen flex items-center px-16 py-24">
+    <div className="h-full flex items-center px-16 py-24">
       <div className="grid grid-cols-3 gap-12 w-full">
         {/* Foto */}
         <div className="flex flex-col items-center justify-center">