fix: make Supabase optional and add assetPrefix support

- lib/supabase.ts: Return null when credentials missing instead of crash
- next.config.js: Add assetPrefix and basePath for VibeCoder proxy
- package.json: Use generic template name (v0.2.0)

lib/supabase.ts

@@ -1,6 +1,14 @@
-import { createClient } from '@supabase/supabase-js';
+import { createClient, SupabaseClient } from '@supabase/supabase-js';
 
-const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL!;
-const supabaseAnonKey = process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!;
+const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL;
+const supabaseAnonKey = process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY;
 
-export const supabase = createClient(supabaseUrl, supabaseAnonKey);
+// Create client only if credentials are available
+// This allows the app to run without Supabase for basic previews
+export const supabase: SupabaseClient | null = 
+  supabaseUrl && supabaseAnonKey
+    ? createClient(supabaseUrl, supabaseAnonKey)
+    : null;
+
+// Helper to check if Supabase is configured
+export const isSupabaseConfigured = (): boolean => supabase !== null;

next.config.js

@@ -1,12 +1,17 @@
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   reactStrictMode: true,
-  // Note: 'output: standalone' is set during Docker build, not in dev mode
+  
+  // Support VibeCoder proxy paths (e.g., /projekte/[id]/preview/)
+  assetPrefix: process.env.ASSET_PREFIX || undefined,
+  basePath: process.env.BASE_PATH || undefined,
+  
   experimental: {
     serverActions: {
       bodySizeLimit: '2mb',
     },
   },
+  
   images: {
     remotePatterns: [
       {

package.json

@@ -1,7 +1,7 @@
 {
-  "name": "project-1766459980010-q6lr8s01b",
-  "version": "0.1.0",
-  "description": "ads",
+  "name": "lumina-nextjs-template",
+  "version": "0.2.0",
+  "description": "Next.js 15 starter template for Lumina VibeCoder projects",
   "private": true,
   "scripts": {
     "dev": "next dev",