Link the card title instead of an extra button in the mail

The plain-text part gets the card URL on its own line. Bumps to 35.2.2.

appinfo/info.xml

@@ -24,7 +24,7 @@ This app lets every user configure Deck automation workflows for the boards they
 
 A background job periodically evaluates all enabled workflows and moves cards whose due date has passed, using Deck's own internal PHP classes only (no HTTP/OCS calls).
 ]]></description>
-    <version>35.2.1</version>
+    <version>35.2.2</version>
     <licence>agpl</licence>
     <author mail="patrick@niebel.ing">Patrick Niebeling</author>
     <namespace>WorkflowDeckAutomation</namespace>

lib/Service/NotificationMailer.php

@@ -98,21 +98,34 @@ class NotificationMailer {
 	 * @param array{board: string, sourceStack: string, targetStack: string} $targets
 	 */
 	private function addCard(IEMailTemplate $template, Workflow $workflow, Card $card, array $targets): void {
-		// Single-argument addBodyText() runs htmlspecialchars() itself, so
-		// these card-, workflow-, board- and stack-titles (user input) are
-		// safe as-is. The card description and the workflow's name are
-		// deliberately left out — the mail only says what moved where.
-		$template->addBodyText(sprintf(
-			'„%1$s“ (Board „%2$s“) ist überfällig und wurde von „%3$s“ nach „%4$s“ verschoben.',
+		// The card description and the workflow's name are deliberately left
+		// out — the mail only says what moved where. The card title itself is
+		// the link to the card.
+		$sentence = '„%1$s“ (Board „%2$s“) ist überfällig und wurde von „%3$s“ nach „%4$s“ verschoben.';
+		$url = $this->urlGenerator->getAbsoluteURL('/apps/deck/board/' . $workflow->getBoardId() . '/card/' . $card->getId());
+
+		// With both parts passed, addBodyText() escapes nothing: every title
+		// is user input and has to be escaped here for the HTML part.
+		$html = sprintf(
+			$sentence,
+			'<a href="' . self::escape($url) . '">' . self::escape($card->getTitle()) . '</a>',
+			self::escape($targets['board']),
+			self::escape($targets['sourceStack']),
+			self::escape($targets['targetStack']),
+		);
+		$plain = sprintf(
+			$sentence,
 			$card->getTitle(),
 			$targets['board'],
 			$targets['sourceStack'],
 			$targets['targetStack'],
-		));
-		$template->addBodyButton(
-			'Karte öffnen',
-			$this->urlGenerator->getAbsoluteURL('/apps/deck/board/' . $workflow->getBoardId() . '/card/' . $card->getId()),
-		);
+		) . PHP_EOL . $url;
+
+		$template->addBodyText($html, $plain);
+	}
+
+	private static function escape(string $text): string {
+		return htmlspecialchars($text, ENT_QUOTES, 'UTF-8');
 	}
 
 	/**

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "workflow_deck_automation",
-	"version": "35.2.1",
+	"version": "35.2.2",
 	"private": true,
 	"type": "module",
 	"description": "Automates moving overdue Deck cards between stacks, configurable per user.",