Fix various phpstan issues.

.ci/phpstan.neon

@@ -67,5 +67,5 @@ parameters:
 
   # The level 8 is the highest level. original was 5
   # 7 is more than enough, higher just leaves NULL things.
-  level: 2
+  level: 3
 

app/Services/Internal/Update/RecurrenceUpdateService.php

@@ -169,7 +169,7 @@ class RecurrenceUpdateService
         if (1 === $originalCount) {
             app('log')->debug('Return the first one');
 
-            // @var RecurrenceRepetition|null
+            /** @var RecurrenceRepetition|null */
             return $recurrence->recurrenceRepetitions()->first();
         }
         // find it:
@@ -187,7 +187,7 @@ class RecurrenceUpdateService
             }
         }
 
-        // @var RecurrenceRepetition|null
+        /** @var RecurrenceRepetition|null */
         return $query->first();
     }
 

app/Support/Amount.php

@@ -175,6 +175,7 @@ class Amount
         if ($cache->has()) {
             return $cache->get();
         }
+        /** @var TransactionCurrency $default */
         $default = $userGroup->currencies()->where('group_default', true)->first();
         if (null === $default) {
             $default = $this->getSystemCurrency();

app/Transformers/TransactionGroupTransformer.php

@@ -247,6 +247,7 @@ class TransactionGroupTransformer extends AbstractTransformer
 
     private function getLocation(TransactionJournal $journal): ?Location
     {
+        /** @var Location|null */
         return $journal->locations()->first();
     }