fix: resolve ctx naming conflict in arr/config.js, add pylon to known config keys

- Remove redundant ctx shim that conflicted with function parameter
- Use destructured notification/safeErrorMessage directly
- Add pylon, customLogoDark, customLogoLight to known config keys

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

dashcaddy-api/routes/arr/config.js

@@ -21,11 +21,6 @@ module.exports = function(ctx) {
   const { credentialManager, servicesStateManager, docker, fetchT, asyncHandler, errorResponse, log, helpers, notification, safeErrorMessage } = ctx;
   const router = express.Router();
   
-  // Ctx shim for backward compatibility
-  const ctx = {
-    notification,
-    safeErrorMessage
-  };
 
   // Auto-configure Overseerr with detected services
   router.post('/arr/configure-overseerr', asyncHandler(async (req, res) => {
@@ -282,7 +277,7 @@ module.exports = function(ctx) {
       } else if (error.name === 'AbortError' || error.message?.includes('timeout')) {
         return errorResponse(res, 504, 'Connection timeout');
       }
-      return errorResponse(res, 500, ctx.safeErrorMessage(error));
+      return errorResponse(res, 500, safeErrorMessage(error));
     }
   }, 'arr-test-connection'));
 
@@ -484,7 +479,7 @@ module.exports = function(ctx) {
 
     // Send notification
     if (anyConfigured) {
-      ctx.notification.send(
+      notification.send(
         'deploymentSuccess',
         'Arr Stack Auto-Connected',
         `Overseerr configured: ${Object.entries(configResults).filter(([k,v]) => v === 'configured').map(([k]) => k).join(', ')}`,