feat: implement advanced tagging system, tag weighting, and app focus refactoring

- Implemented reusable TagSelector component with i18n support
- Added tag weighting system (popularity scores 1-5)
- Created admin panel for tag management
- Integrated Nebius AI and Brave Search for 'Magic Scan'
- Refactored app focus: removed bottle status, updated counters, and displayed extended bottle details
- Updated i18n for German and English
- Added database migration scripts

src/lib/ai-client.ts

@@ -0,0 +1,6 @@
+import { OpenAI } from 'openai';
+
+export const aiClient = new OpenAI({
+    baseURL: 'https://api.tokenfactory.nebius.com/v1/',
+    apiKey: process.env.NEBIUS_API_KEY,
+});

src/lib/supabase-admin.ts

@@ -0,0 +1,19 @@
+import { createClient } from '@supabase/supabase-js';
+
+const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL;
+const supabaseServiceKey = process.env.SUPABASE_SERVICE_ROLE_KEY;
+
+if (!supabaseUrl || !supabaseServiceKey) {
+    if (process.env.NODE_ENV !== 'production') {
+        console.warn('Supabase Admin Error: SUPABASE_SERVICE_ROLE_KEY is missing.');
+    }
+}
+
+export const supabaseAdmin = (supabaseUrl && supabaseServiceKey)
+    ? createClient(supabaseUrl, supabaseServiceKey, {
+        auth: {
+            autoRefreshToken: false,
+            persistSession: false,
+        },
+    })
+    : null as any;