fix: use admin API for Umami config in analytics page

- Changed from public settings endpoint to admin settings endpoint
- Fixed "Unexpected token '<'" JSON parse error
- Properly transforms settings array to key-value map
- Uses correct setting keys (analytics_umami_*)
- Maintains fallback to environment variables

The analytics page now correctly fetches Umami configuration using
the authenticated admin API instead of the public endpoint, which
was returning errors and causing JSON parse failures.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

frontend/src/pages/admin/AnalyticsPage.tsx

@@ -17,6 +17,7 @@ import { Button, Card, Loading } from '../../components/common';
 import { useQuery } from '@tanstack/react-query';
 import { adminService } from '../../services/admin.service';
 import { useTranslation } from 'react-i18next';
+import { api } from '../../config/api';
 
 // Map API response to component format
 interface ComponentAnalyticsData {
@@ -71,23 +72,25 @@ export const AnalyticsPage: React.FC = () => {
     queryFn: () => adminService.getDashboardStats(),
   });
 
-  // Fetch public settings to get Umami config
+  // Fetch Umami config from admin settings since we're in admin panel
   useEffect(() => {
     const fetchUmamiConfig = async () => {
       try {
-        const response = await fetch(`${import.meta.env.VITE_API_URL}/api/public/settings`);
+        // Use admin API endpoint with auth token since we're in admin area
+        const response = await api.get('/admin/settings');
+        const settings = response.data;
         
-        if (!response.ok) {
-          throw new Error(`HTTP error! status: ${response.status}`);
-        }
-        
-        const settings = await response.json();
+        // Transform the settings array to object
+        const settingsMap = settings.reduce((acc: any, setting: any) => {
+          acc[setting.key] = setting.value;
+          return acc;
+        }, {});
         
         // Check if Umami is enabled in admin settings
-        if (settings.umami_enabled && settings.umami_url && settings.umami_website_id) {
+        if (settingsMap.analytics_umami_enabled && settingsMap.analytics_umami_url && settingsMap.analytics_umami_website_id) {
           setUmamiConfig({
-            url: settings.umami_url,
-            shareUrl: settings.umami_share_url,
+            url: settingsMap.analytics_umami_url,
+            shareUrl: settingsMap.analytics_umami_share_url,
             enabled: true
           });
         } else {