Fix attributeBoolean (#6543)

Regression from https://github.com/FreshRSS/FreshRSS/pull/5946
fix https://github.com/FreshRSS/FreshRSS/issues/6521

app/Controllers/feedController.php

@@ -540,7 +540,7 @@ class FreshRSS_feed_Controller extends FreshRSS_ActionController {
 			$nbMarkedUnread = 0;
 
 			if (count($newGuids) > 0) {
-				if ($feed->attributeBoolean('read_when_same_title_in_feed') === null) {
+				if (!$feed->hasAttribute('read_when_same_title_in_feed')) {
 					$readWhenSameTitleInFeed = (int)FreshRSS_Context::userConf()->mark_when['same_title_in_feed'];
 				} elseif ($feed->attributeBoolean('read_when_same_title_in_feed') === false) {
 					$readWhenSameTitleInFeed = 0;

app/Models/AttributesTrait.php

@@ -15,6 +15,11 @@ trait FreshRSS_AttributesTrait {
 		return $this->attributes;
 	}
 
+	/** @param non-empty-string $key */
+	public function hasAttribute(string $key): bool {
+		return isset($this->attributes[$key]);
+	}
+
 	/**
 	 * @param non-empty-string $key
 	 * @return array<int|string,mixed>|null

app/Models/Entry.php

@@ -672,8 +672,7 @@ HTML;
 			return;
 		}
 		if (!$this->isRead()) {
-			if ($feed->attributeBoolean('read_upon_reception') ||
-				($feed->attributeBoolean('read_upon_reception') === null && FreshRSS_Context::userConf()->mark_when['reception'])) {
+			if ($feed->attributeBoolean('read_upon_reception') ?? FreshRSS_Context::userConf()->mark_when['reception']) {
 				$this->_isRead(true);
 				Minz_ExtensionManager::callHook('entry_auto_read', $this, 'upon_reception');
 			}

app/views/helpers/feed/update.phtml

@@ -200,7 +200,7 @@
 				<label class="group-name" for="read_when_same_title_in_feed"><?= _t('conf.reading.read.when') ?></label>
 				<div class="group-controls">
 					<select name="read_when_same_title_in_feed" id="read_when_same_title_in_feed" class="w50">
-						<option value=""<?= $this->feed->attributeBoolean('read_when_same_title_in_feed') === null ? ' selected="selected"' : '' ?>><?= _t('gen.short.by_default') ?></option>
+						<option value=""<?= $this->feed->hasAttribute('read_when_same_title_in_feed') ? '' : ' selected="selected"' ?>><?= _t('gen.short.by_default') ?></option>
 						<option value="0"<?= $this->feed->attributeBoolean('read_when_same_title_in_feed') === false ? ' selected="selected"' : '' ?>><?= _t('gen.short.no') ?></option>
 						<option value="10"<?= $this->feed->attributeInt('read_when_same_title_in_feed') == 10 ? ' selected="selected"' : '' ?>>10</option>
 						<option value="25"<?= $this->feed->attributeInt('read_when_same_title_in_feed') == 25 ? ' selected="selected"' : '' ?>>25</option>