refactor: reorganize admin sidebar sections

- Move Background Tasks from Platform Health to Platform Monitoring
- Move Notifications from Settings to Platform Monitoring
- Rename Settings section to Platform Settings
- Update init-alpine.js page-to-section mappings

Platform Monitoring now contains: Import Jobs, Background Tasks,
Application Logs, and Notifications for centralized operational monitoring.

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/templates/admin/partials/sidebar.html

@@ -113,23 +113,23 @@
     {% call section_content('platformHealth') %}
         {{ menu_item('testing', '/admin/testing', 'beaker', 'Testing Hub') }}
         {{ menu_item('code-quality', '/admin/code-quality', 'shield-check', 'Code Quality') }}
-        {{ menu_item('background-tasks', '/admin/background-tasks', 'collection', 'Background Tasks') }}
     {% endcall %}
 
     <!-- Platform Monitoring Section -->
     {{ section_header('Platform Monitoring', 'monitoring') }}
     {% call section_content('monitoring') %}
         {{ menu_item('imports', '/admin/imports', 'cube', 'Import Jobs') }}
+        {{ menu_item('background-tasks', '/admin/background-tasks', 'collection', 'Background Tasks') }}
         {{ menu_item('logs', '/admin/logs', 'document-text', 'Application Logs') }}
+        {{ menu_item('notifications-settings', '/admin/notifications-settings', 'bell', 'Notifications') }}
     {% endcall %}
 
-    <!-- Settings Section -->
-    {{ section_header('Settings', 'settingsSection') }}
+    <!-- Platform Settings Section -->
+    {{ section_header('Platform Settings', 'settingsSection') }}
     {% call section_content('settingsSection') %}
         {{ menu_item('settings', '/admin/settings', 'cog', 'General') }}
         {{ menu_item('profile', '/admin/profile', 'user-circle', 'Profile') }}
         {{ menu_item('api-keys', '/admin/api-keys', 'key', 'API Keys') }}
-        {{ menu_item('notifications-settings', '/admin/notifications-settings', 'bell', 'Notifications') }}
     {% endcall %}
 </div>
 {% endmacro %}

static/admin/js/init-alpine.js

@@ -80,15 +80,15 @@ function data() {
     // Platform Health
     testing: 'platformHealth',
     'code-quality': 'platformHealth',
-    'background-tasks': 'platformHealth',
     // Platform Monitoring
     imports: 'monitoring',
+    'background-tasks': 'monitoring',
     logs: 'monitoring',
-    // Settings
+    'notifications-settings': 'monitoring',
+    // Platform Settings
     settings: 'settingsSection',
     profile: 'settingsSection',
-    'api-keys': 'settingsSection',
-    'notifications-settings': 'settingsSection'
+    'api-keys': 'settingsSection'
   };
 
   return {