Fix nullability check in course and vote routes

This commit fixes a nullability check in the CourseRoute and VoteRoute classes. The transition.to property is now properly checked for null
before accessing its name property. This change ensures that the code does not throw an error when transition.to is null, preventing
potential bugs.

app/routes/course.ts

@@ -134,7 +134,7 @@ export default class CourseRoute extends BaseRoute {
  }
 
  redirect(_model: ModelType, transition: Transition) {
- if (transition.to.name === 'course.index') {
+ if (transition.to?.name === 'course.index') {
  const activeStep = this.coursePageState.stepListAsStepList.activeStep;
 
  // @ts-ignore not sure if we need to handle nullity here

app/routes/vote.ts

@@ -26,7 +26,7 @@ export default class VoteRoute extends BaseRoute {
  }
 
  afterModel(_model: ModelType, transition: Transition) {
- if (transition.to.name === 'vote.index') {
+ if (transition.to?.name === 'vote.index') {
  this.router.transitionTo('vote.course-ideas');
  }
  }

app/utils/base-route.ts

@@ -25,13 +25,13 @@ export default class BaseRoute extends Route {
  }
 
  if (!this.allowsAnonymousAccess && !this.authenticator.isAuthenticated) {
- const params = paramsFromRouteInfo(transition.to);
+ const params = transition.to ? paramsFromRouteInfo(transition.to) : [];
 
  if (params.length > 0) {
  const paramValues = params.map(([_, value]) => value);
- this.authenticator.initiateLogin(this.router.urlFor(transition.to.name, ...paramValues));
+ this.authenticator.initiateLogin(this.router.urlFor(transition.to?.name || 'catalog', ...paramValues));
  } else {
- this.authenticator.initiateLogin(this.router.urlFor(transition.to.name));
+ this.authenticator.initiateLogin(this.router.urlFor(transition.to?.name || 'catalog'));
  }
 
  transition.abort();
@@ -44,9 +44,9 @@ export default class BaseRoute extends Route {
  }
  }
 
- const queryParams = transition.to.queryParams;
+ const queryParams = transition.to?.queryParams;
 
- if (queryParams['r'] && /^\d[a-zA-Z][a-zA-Z]$/.test(queryParams['r'])) {
+ if (queryParams && queryParams['r'] && /^\d[a-zA-Z][a-zA-Z]$/.test(queryParams['r'])) {
  // @ts-ignore
  this.utmCampaignIdTracker.setCampaignId(queryParams['r']);
  delete queryParams['r'];