feat: squelette de l'extension Read More (config, i18n)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

extension.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+final class ReadMoreExtension extends Minz_Extension {
+	public const DEFAULT_HEIGHT = 250;
+	public const MIN_HEIGHT = 100;
+	public const MAX_HEIGHT = 2000;
+
+	#[\Override]
+	public function init(): void {
+		$this->registerTranslates();
+		if (!FreshRSS_Context::hasUserConf()) {
+			return;
+		}
+		Minz_View::appendStyle($this->getFileUrl('read-more.css'));
+		Minz_View::appendScript($this->getFileUrl('read-more.js'));
+		$this->registerHook(Minz_HookType::JsVars, $this->jsVars(...));
+	}
+
+	public static function clampHeight(int $height): int {
+		return max(self::MIN_HEIGHT, min(self::MAX_HEIGHT, $height));
+	}
+
+	public function getCollapsedHeight(): int {
+		return self::clampHeight($this->getUserConfigurationInt('collapsed_height') ?? self::DEFAULT_HEIGHT);
+	}
+
+	/**
+	 * Pass parameters to read-more.js via `window.context.extensions`.
+	 * @param array<mixed> $vars
+	 * @return array<mixed>
+	 */
+	public function jsVars(array $vars): array {
+		$vars['read_more'] = [
+			'collapsed_height' => $this->getCollapsedHeight(),
+			'label' => _t('ext.read_more.button'),
+		];
+		return $vars;
+	}
+
+	#[\Override]
+	public function handleConfigureAction(): void {
+		$this->registerTranslates();
+		if (Minz_Request::isPost()) {
+			$height = Minz_Request::paramInt('collapsed_height') ?: self::DEFAULT_HEIGHT;
+			$this->setUserConfigurationValue('collapsed_height', self::clampHeight($height));
+		}
+	}
+}