refactor: move language picker to sidebar as dropdown

- Remove language button from header
- Add language select dropdown in sidebar settings
- Add translations for "Language" label in all languages
- Remove unused .lang-switch CSS

src/app.js

@@ -2,7 +2,7 @@ import { LessonEngine } from "./impl/LessonEngine.js";
 import { CodeEditor } from "./impl/CodeEditor.js";
 import { renderLesson, renderModuleList, renderLevelIndicator, updateActiveLessonInSidebar } from "./helpers/renderer.js";
 import { loadModules } from "./config/lessons.js";
-import { initI18n, t, getLanguage, setLanguage, getNextLanguage, applyTranslations } from "./i18n.js";
+import { initI18n, t, getLanguage, setLanguage, applyTranslations } from "./i18n.js";
 
 // Simplified state - LessonEngine now manages lesson state and progress
 const state = {
@@ -17,7 +17,7 @@ const elements = {
 	// Header
 	menuBtn: document.getElementById("menu-btn"),
 	logoLink: document.getElementById("logo-link"),
-	langBtn: document.getElementById("lang-btn"),
+	langSelect: document.getElementById("lang-select"),
 	helpBtn: document.getElementById("help-btn"),
 
 	// Left panel
@@ -117,10 +117,7 @@ function toggleExpectedResult() {
 
 // ================= LANGUAGE TOGGLE =================
 
-function toggleLanguage() {
-	const currentLang = getLanguage();
-	const newLang = getNextLanguage(currentLang);
-
+function changeLanguage(newLang) {
 	// Add transition class before any updates
 	elements.editorSection?.classList.add("transitioning");
 
@@ -730,8 +727,9 @@ function init() {
 		loadCurrentLesson();
 	});
 
-	// Language toggle
-	elements.langBtn.addEventListener("click", toggleLanguage);
+	// Language select
+	elements.langSelect.value = getLanguage();
+	elements.langSelect.addEventListener("change", (e) => changeLanguage(e.target.value));
 
 	// Expected result toggle
 	elements.showExpectedBtn.addEventListener("click", toggleExpectedResult);

src/i18n.js

@@ -36,6 +36,7 @@ const translations = {
 		// Sidebar
 		menu: "Menu",
 		closeMenu: "Close menu",
+		language: "Language",
 		progress: "Progress",
 		progressText: "{percent}% Complete ({completed}/{total})",
 		lessons: "Lessons",
@@ -135,6 +136,7 @@ const translations = {
 		// Sidebar
 		menu: "Menü",
 		closeMenu: "Menü schließen",
+		language: "Sprache",
 		progress: "Fortschritt",
 		progressText: "{percent}% abgeschlossen ({completed}/{total})",
 		lessons: "Lektionen",
@@ -235,6 +237,7 @@ const translations = {
 		// Sidebar
 		menu: "Menu",
 		closeMenu: "Zamknij menu",
+		language: "Język",
 		progress: "Postęp",
 		progressText: "{percent}% ukończone ({completed}/{total})",
 		lessons: "Lekcje",
@@ -335,6 +338,7 @@ const translations = {
 		// Sidebar
 		menu: "Menú",
 		closeMenu: "Cerrar menú",
+		language: "Idioma",
 		progress: "Progreso",
 		progressText: "{percent}% completado ({completed}/{total})",
 		lessons: "Lecciones",
@@ -435,6 +439,7 @@ const translations = {
 		// Sidebar
 		menu: "القائمة",
 		closeMenu: "إغلاق القائمة",
+		language: "اللغة",
 		progress: "التقدم",
 		progressText: "{percent}% مكتمل ({completed}/{total})",
 		lessons: "الدروس",
@@ -535,6 +540,7 @@ const translations = {
 		// Sidebar
 		menu: "Меню",
 		closeMenu: "Закрити меню",
+		language: "Мова",
 		progress: "Прогрес",
 		progressText: "{percent}% завершено ({completed}/{total})",
 		lessons: "Уроки",

src/index.html

@@ -20,7 +20,6 @@
 					<h1><span class="code-text">CODE</span><span>CRISPIES</span></h1>
 				</a>
 				<div class="header-actions">
-					<button id="lang-btn" class="lang-switch" data-i18n-aria-label="langSwitchLabel" data-i18n="langSwitch" aria-label="Sprache wechseln: Deutsch">DE</button>
 					<button id="help-btn" class="help-toggle" data-i18n-aria-label="help" aria-label="Help">?</button>
 				</div>
 			</header>
@@ -109,6 +108,17 @@
 
 				<div class="sidebar-section">
 					<h4 data-i18n="settings">Settings</h4>
+					<label class="setting-row">
+						<span class="setting-label" data-i18n="language">Language</span>
+						<select id="lang-select" class="lang-select">
+							<option value="en">English</option>
+							<option value="de">Deutsch</option>
+							<option value="pl">Polski</option>
+							<option value="es">Español</option>
+							<option value="ar">العربية</option>
+							<option value="uk">Українська</option>
+						</select>
+					</label>
 					<label class="toggle-switch">
 						<input type="checkbox" id="disable-feedback-toggle" checked />
 						<span class="toggle-slider"></span>

src/main.css

@@ -220,28 +220,6 @@ code, kbd {
 	gap: var(--spacing-sm);
 }
 
-.lang-switch {
-	display: flex;
-	align-items: center;
-	justify-content: center;
-	width: 28px;
-	height: 28px;
-	border-radius: 50%;
-	border: 2px solid var(--border-color);
-	background: none;
-	font-size: 0.7rem;
-	font-weight: 700;
-	text-decoration: none;
-	color: var(--light-text);
-	transition: all 0.2s;
-}
-
-.lang-switch:hover {
-	border-color: var(--primary-color);
-	color: var(--primary-color);
-	background: var(--primary-bg-light);
-}
-
 /* ================= GAME LAYOUT ================= */
 .game-layout {
 	display: flex;
@@ -991,6 +969,41 @@ button.lesson-list-item {
 }
 
 /* ================= TOGGLE SWITCH ================= */
+/* Setting row (for label + control) */
+.setting-row {
+	display: flex;
+	align-items: center;
+	justify-content: space-between;
+	margin-bottom: var(--spacing-sm);
+}
+
+.setting-label {
+	font-size: 0.9rem;
+	color: var(--text-color);
+}
+
+/* Language select */
+.lang-select {
+	padding: 6px 10px;
+	border: 1px solid var(--border-color);
+	border-radius: var(--radius-sm);
+	background: var(--panel-bg);
+	color: var(--text-color);
+	font-size: 0.85rem;
+	cursor: pointer;
+	min-width: 120px;
+}
+
+.lang-select:hover {
+	border-color: var(--primary-color);
+}
+
+.lang-select:focus {
+	outline: none;
+	border-color: var(--primary-color);
+	box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
+}
+
 .toggle-switch {
 	display: flex;
 	align-items: center;