feat: complete bottle-to-session integration flow

src/app/bottles/[id]/page.tsx

@@ -2,7 +2,7 @@ import { createServerComponentClient } from '@supabase/auth-helpers-nextjs';
 import { cookies } from 'next/headers';
 import { notFound } from 'next/navigation';
 import Link from 'next/link';
-import { ChevronLeft, Calendar, Award, Droplets, MapPin, Tag, ExternalLink, Package } from 'lucide-react';
+import { ChevronLeft, Calendar, Award, Droplets, MapPin, Tag, ExternalLink, Package, PlusCircle } from 'lucide-react';
 import { getStorageUrl } from '@/lib/supabase';
 import TastingNoteForm from '@/components/TastingNoteForm';
 import StatusSwitcher from '@/components/StatusSwitcher';
@@ -48,13 +48,25 @@ export default async function BottlePage({
             <div className="max-w-4xl mx-auto space-y-6 md:space-y-12">
                 {/* Back Button */}
                 <Link
-                    href="/"
+                    href={`/${sessionId ? `?session_id=${sessionId}` : ''}`}
                     className="inline-flex items-center gap-2 text-zinc-500 hover:text-amber-600 transition-colors font-medium mb-4"
                 >
                     <ChevronLeft size={20} />
                     Zurück zur Sammlung
                 </Link>
 
+                {sessionId && (
+                    <div className="bg-amber-600/10 border border-amber-600/20 p-4 rounded-2xl flex items-center gap-4 text-amber-700 dark:text-amber-400 animate-in slide-in-from-top-4 duration-500">
+                        <div className="bg-amber-600 text-white p-2 rounded-xl">
+                            <PlusCircle size={20} />
+                        </div>
+                        <div>
+                            <p className="font-bold">Session Aktiv!</p>
+                            <p className="text-sm opacity-80">Jede Tasting Note, die du jetzt speicherst, wird automatisch deiner Session zugeordnet. 🥃</p>
+                        </div>
+                    </div>
+                )}
+
                 {/* Hero Section */}
                 <section className="grid grid-cols-1 md:grid-cols-2 gap-8 items-start">
                     <div className="aspect-[4/5] rounded-3xl overflow-hidden shadow-2xl border border-zinc-200 dark:border-zinc-800">