Fix: Add routes and admin navigation

- Created appinfo/routes.php to register all routes
  - Admin routes: index, save, load, getStatus
  - API v1 routes: reports, getReport, generate, getStatus
  - Report routes: index, generate
- Added index() method to AdminController
  - Renders admin template via TemplateResponse
- Updated info.xml and appinfo/info.xml
  - Fixed navigation entry to point to route: analyticshub.admin.index
  - Added settings and navigation sections
- App now appears in Settings → Administration after enable/disable

Fixes issue where app didn't show up in Nextcloud toolbar after being enabled.

analyticshub/appinfo/info.xml

@@ -24,6 +24,12 @@
     <nextcloud min-version="25" max-version="26"/>
     <php min-version="7.4"/>
   </dependencies>
+  <settings>
+    <admin>OCA\AnalyticsHub\Controller\Admin</admin>
+  </settings>
+  <navigation>
+    <admin>analyticshub.admin.index</admin>
+  </navigation>
   <repair-steps>
   <step>Repair steps not needed</step>
   <repair-step>Or remove and reinstall</repair-step>

analyticshub/appinfo/routes.php

@@ -0,0 +1,67 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Routes for Mini-CMO Analytics Hub
+ */
+
+return [
+    'routes' => [
+        // Admin routes
+        [
+            'name' => 'admin#index',
+            'url' => '/admin',
+            'verb' => 'GET'
+        ],
+        [
+            'name' => 'admin#save',
+            'url' => '/admin/save',
+            'verb' => 'POST'
+        ],
+        [
+            'name' => 'admin#load',
+            'url' => '/admin/load',
+            'verb' => 'GET'
+        ],
+        [
+            'name' => 'admin#getStatus',
+            'url' => '/admin/status',
+            'verb' => 'GET'
+        ],
+
+        // API v1 routes
+        [
+            'name' => 'api_v1#reports',
+            'url' => '/api/reports',
+            'verb' => 'GET'
+        ],
+        [
+            'name' => 'api_v1#getReport',
+            'url' => '/api/report/{id}',
+            'verb' => 'GET'
+        ],
+        [
+            'name' => 'api_v1#generate',
+            'url' => '/api/generate',
+            'verb' => 'POST'
+        ],
+        [
+            'name' => 'api_v1#getStatus',
+            'url' => '/api/status',
+            'verb' => 'GET'
+        ],
+
+        // Report routes
+        [
+            'name' => 'report#index',
+            'url' => '/report',
+            'verb' => 'GET'
+        ],
+        [
+            'name' => 'report#generate',
+            'url' => '/report/generate',
+            'verb' => 'POST'
+        ],
+    ],
+];