feat: Upgrade to Next.js 16.1 & React 19.2, migrate to Supabase SSR with async client handling

src/services/buddy.ts

@@ -0,0 +1,53 @@
+'use server';
+
+import { createClient } from '@/lib/supabase/server';
+import { BuddySchema, BuddyData } from '@/types/whisky';
+
+export async function addBuddy(rawData: BuddyData) {
+    const supabase = await createClient();
+
+    try {
+        const { name } = BuddySchema.parse(rawData);
+        const { data: { session } } = await supabase.auth.getSession();
+        if (!session) throw new Error('Nicht autorisiert');
+
+        const { data, error } = await supabase
+            .from('buddies')
+            .insert([{ name, user_id: session.user.id }])
+            .select()
+            .single();
+
+        if (error) throw error;
+        return { success: true, data };
+    } catch (error) {
+        console.error('Add Buddy Error:', error);
+        return {
+            success: false,
+            error: error instanceof Error ? error.message : 'Fehler beim Hinzufügen des Buddies',
+        };
+    }
+}
+
+export async function deleteBuddy(id: string) {
+    const supabase = await createClient();
+
+    try {
+        const { data: { session } } = await supabase.auth.getSession();
+        if (!session) throw new Error('Nicht autorisiert');
+
+        const { error } = await supabase
+            .from('buddies')
+            .delete()
+            .eq('id', id)
+            .eq('user_id', session.user.id);
+
+        if (error) throw error;
+        return { success: true };
+    } catch (error) {
+        console.error('Delete Buddy Error:', error);
+        return {
+            success: false,
+            error: error instanceof Error ? error.message : 'Fehler beim Löschen des Buddies',
+        };
+    }
+}