[fix](trx-frontend-http): load scheduler plugin on settings tab instead of recorder

The lazy plugin loader introduced in 25c5940 incorrectly mapped
scheduler.js to the 'recorder' tab. The scheduler UI lives under
Settings → Scheduler, so the plugin must load with the 'settings' tab.
This caused the scheduler controls to be invisible and non-functional.

https://claude.ai/code/session_01NuatkhpFU7JCRnAbNUavPk
Signed-off-by: Claude <noreply@anthropic.com>

src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html

@@ -1566,8 +1566,8 @@
     'map': ['/map-core.js', '/leaflet-ais-tracksymbol.js', '/ais.js', '/vdes.js', '/aprs.js', '/hf-aprs.js', '/sat.js', '/sat-scheduler.js'],
     'statistics': ['/map-core.js'],
     'bookmarks': ['/bookmarks.js'],
-    'recorder': ['/scheduler.js'],
-    'settings': ['/vchan.js']
+    'recorder': [],
+    'settings': ['/vchan.js', '/scheduler.js']
   };
   var loaded = new Set();
   function loadPlugins(tab) {