Add default null values to "current /something/" properties

These will always be initialized in the `action*()` methods and so will always be available in the `createComponent*()` methods. But Psalm can't possibly know that. Still not sure I like it this way, it's there mostly for Psalm only but maybe it's ok.

Resolves errors like
```
ERROR: PropertyNotSetInConstructor - app/Admin/Presenters/TrainingsPresenter.php:44:30 - Property MichalSpacekCz\Admin\Presenters\TrainingsPresenter::$application is not defined in constructor of MichalSpacekCz\Admin\Presenters\TrainingsPresenter or in any private or final methods called in the constructor (see https://psalm.dev/074)
        private TrainingApplication $application;
```

site/app/Admin/Presenters/InterviewsPresenter.php

@@ -10,12 +10,13 @@
 use MichalSpacekCz\Interviews\InterviewInputs;
 use MichalSpacekCz\Interviews\InterviewInputsFactory;
 use MichalSpacekCz\Interviews\Interviews;
+use MichalSpacekCz\ShouldNotHappenException;
 use Nette\Application\BadRequestException;
 
 class InterviewsPresenter extends BasePresenter
 {
 
-	private Interview $interview;
+	private ?Interview $interview = null;
 
 
 	public function __construct(
@@ -49,6 +50,9 @@ public function actionInterview(int $param): void
 
 	protected function createComponentEditInterviewInputs(): InterviewInputs
 	{
+		if (!$this->interview) {
+			throw new ShouldNotHappenException('actionInterview() will be called first');
+		}
 		return $this->interviewInputsFactory->createFor($this->interview);
 	}
 

site/app/Admin/Presenters/TalksPresenter.php

@@ -7,6 +7,7 @@
 use MichalSpacekCz\Form\TalkSlidesFormFactory;
 use MichalSpacekCz\Http\HttpInput;
 use MichalSpacekCz\Media\Exceptions\ContentTypeException;
+use MichalSpacekCz\ShouldNotHappenException;
 use MichalSpacekCz\Talks\Exceptions\TalkDoesNotExistException;
 use MichalSpacekCz\Talks\Talk;
 use MichalSpacekCz\Talks\TalkInputs;
@@ -21,7 +22,7 @@
 class TalksPresenter extends BasePresenter
 {
 
-	private Talk $talk;
+	private ?Talk $talk = null;
 
 	/** @var array<int, Row> slide number => data */
 	private array $slides = [];
@@ -86,6 +87,9 @@ public function actionSlides(int $param): void
 
 	protected function createComponentEditTalkInputs(): TalkInputs
 	{
+		if (!$this->talk) {
+			throw new ShouldNotHappenException('actionTalk() will be called first');
+		}
 		return $this->talkInputsFactory->createFor($this->talk);
 	}
 
@@ -98,6 +102,9 @@ protected function createComponentAddTalkInputs(): TalkInputs
 
 	protected function createComponentSlides(): Form
 	{
+		if (!$this->talk) {
+			throw new ShouldNotHappenException('actionSlides() will be called first');
+		}
 		return $this->talkSlidesFormFactory->create(
 			function (Html $message, string $type, int $talkId): never {
 				$this->flashMessage($message, $type);

site/app/Admin/Presenters/TrainingsPresenter.php

@@ -9,6 +9,7 @@
 use MichalSpacekCz\Form\TrainingApplicationMultipleFormFactory;
 use MichalSpacekCz\Form\TrainingFileFormFactory;
 use MichalSpacekCz\Form\TrainingStatusesFormFactory;
+use MichalSpacekCz\ShouldNotHappenException;
 use MichalSpacekCz\Training\Applications\TrainingApplication;
 use MichalSpacekCz\Training\Applications\TrainingApplications;
 use MichalSpacekCz\Training\DateList\DateListOrder;
@@ -41,11 +42,11 @@ class TrainingsPresenter extends BasePresenter
 	/** @var int[] */
 	private array $applicationIdsAllowedFiles = [];
 
-	private TrainingApplication $application;
+	private ?TrainingApplication $application = null;
 
-	private TrainingReview $review;
+	private ?TrainingReview $review = null;
 
-	private TrainingDate $training;
+	private ?TrainingDate $training = null;
 
 	/** @var list<TrainingDate> */
 	private array $pastWithPersonalData = [];
@@ -243,6 +244,9 @@ function (?Html $message): never {
 
 	protected function createComponentApplications(): Form
 	{
+		if (!$this->training) {
+			throw new ShouldNotHappenException('actionDate() will be called first');
+		}
 		return $this->trainingApplicationMultipleFormFactory->create(
 			function (int $dateId): never {
 				$this->redirect($this->getAction(), $dateId);
@@ -254,6 +258,9 @@ function (int $dateId): never {
 
 	protected function createComponentApplicationForm(): Form
 	{
+		if (!$this->application) {
+			throw new ShouldNotHappenException('actionApplication() will be called first');
+		}
 		return $this->trainingApplicationAdminFactory->create(
 			function (?int $dateId): never {
 				if ($dateId) {
@@ -272,6 +279,9 @@ function (): never {
 
 	protected function createComponentFile(): Form
 	{
+		if (!$this->training) {
+			throw new ShouldNotHappenException('actionDate() or actionFiles() will be called first');
+		}
 		return $this->trainingFileFormFactory->create(
 			function (Html|string $message, string $type): never {
 				$this->flashMessage($message, $type);
@@ -285,6 +295,9 @@ function (Html|string $message, string $type): never {
 
 	protected function createComponentEditTrainingDateInputs(): TrainingDateInputs
 	{
+		if (!$this->training) {
+			throw new ShouldNotHappenException('actionDate() will be called first');
+		}
 		return $this->trainingDateInputsFactory->createFor($this->training);
 	}
 
@@ -321,12 +334,18 @@ protected function createComponentPastWithPersonalDataTrainingApplicationsList()
 
 	protected function createComponentEditReviewInputs(): TrainingReviewInputs
 	{
+		if (!$this->review) {
+			throw new ShouldNotHappenException('actionReview() will be called first');
+		}
 		return $this->trainingReviewInputsFactory->create(false, $this->review->getDateId(), $this->review);
 	}
 
 
 	protected function createComponentAddReviewInputs(): TrainingReviewInputs
 	{
+		if (!$this->training) {
+			throw new ShouldNotHappenException('actionDate() will be called first');
+		}
 		return $this->trainingReviewInputsFactory->create(true, $this->training->getId());
 	}
 

site/app/Www/Presenters/TrainingsPresenter.php

@@ -33,7 +33,7 @@
 class TrainingsPresenter extends BasePresenter
 {
 
-	private Training $training;
+	private ?Training $training = null;
 
 	/** @var array<int, TrainingDate> id => date */
 	private array $dates = [];
@@ -86,22 +86,22 @@ public function actionTraining(string $name): void
 		}
 		$this->training = $training;
 
-		$this->redirectToSuccessor($this->training->getSuccessorId());
+		$this->redirectToSuccessor($training->getSuccessorId());
 
-		$this->dates = $this->trainingDates->getDates($this->training->getId());
+		$this->dates = $this->trainingDates->getDates($training->getId());
 
 		$session = $this->getSession();
 		$session->start(); // in createComponentApplication() it's too late as the session cookie cannot be set because the output is already sent
 
-		$this->template->pageTitle = $this->texyFormatter->translate('messages.title.training', [$this->training->getName()->render()]);
-		$this->template->training = $this->training;
+		$this->template->pageTitle = $this->texyFormatter->translate('messages.title.training', [$training->getName()->render()]);
+		$this->template->training = $training;
 		$this->template->lastFreeSeats = $this->freeSeats->lastFreeSeatsAnyDate($this->dates);
 		$this->template->dates = $this->dates;
 		$this->template->singleDate = count($this->dates) === 1 ? $this->trainingDates->formatDateVenueForUser(reset($this->dates)) : null;
 		$this->template->dataRetention = $this->trainingDates->getDataRetentionDays();
-		$this->template->reviews = $this->trainingReviews->getVisibleReviews($this->training->getId(), 3);
+		$this->template->reviews = $this->trainingReviews->getVisibleReviews($training->getId(), 3);
 		$this->template->loadCompanyDataVisible = $this->companyInfo->isLoadCompanyDataVisible();
-		$this->discontinuedTrainings->maybeMarkAsDiscontinued($this->template, $this->training->getDiscontinuedId());
+		$this->discontinuedTrainings->maybeMarkAsDiscontinued($this->template, $training->getDiscontinuedId());
 	}
 
 
@@ -131,6 +131,9 @@ public function actionApplication(string $name, ?string $param): void
 
 	protected function createComponentApplication(): Form
 	{
+		if (!$this->training) {
+			throw new ShouldNotHappenException('actionTraining() or actionSuccess() will be called first');
+		}
 		return $this->trainingApplicationFactory->create(
 			function (string $name): never {
 				$this->redirect('success', $name);
@@ -148,6 +151,9 @@ function (string $message): void {
 
 	protected function createComponentApplicationPreliminary(): Form
 	{
+		if (!$this->training) {
+			throw new ShouldNotHappenException('actionTraining() will be called first');
+		}
 		if ($this->training->getDiscontinuedId()) {
 			throw new BadRequestException("No signups for discontinued trainings id {$this->training->getDiscontinuedId()}");
 		}

site/app/Www/Presenters/VenuesPresenter.php

@@ -4,6 +4,7 @@
 namespace MichalSpacekCz\Www\Presenters;
 
 use MichalSpacekCz\Formatter\TexyFormatter;
+use MichalSpacekCz\ShouldNotHappenException;
 use MichalSpacekCz\Training\DateList\UpcomingTrainingDatesList;
 use MichalSpacekCz\Training\DateList\UpcomingTrainingDatesListFactory;
 use MichalSpacekCz\Training\Exceptions\TrainingVenueNotFoundException;
@@ -13,7 +14,7 @@
 class VenuesPresenter extends BasePresenter
 {
 
-	private UpcomingTrainingDatesList $upcomingTrainingDatesList;
+	private ?UpcomingTrainingDatesList $upcomingTrainingDatesList = null;
 
 
 	public function __construct(
@@ -42,6 +43,9 @@ public function actionVenue(string $name): void
 
 	protected function createComponentUpcomingDatesList(): UpcomingTrainingDatesList
 	{
+		if (!$this->upcomingTrainingDatesList) {
+			throw new ShouldNotHappenException('actionVenue() will be called first');
+		}
 		return $this->upcomingTrainingDatesList;
 	}