fix(i18n): sync all lesson translations with English source

Synchronizes 72 lesson files across 5 languages (de, pl, es, ar, uk) to match
the English source. This ensures code, solutions, and validations are identical
while only title, description, task, and message fields are translated.

Changes include:
- Box model lessons (01-box-model.json)
- Units and variables (05-units-variables.json)
- Transitions and animations (06-transitions-animations.json)
- Responsive design (08-responsive.json)
- HTML elements (20-html-elements.json)
- HTML forms basic and validation (21, 22)
- HTML details/summary, progress/meter (23, 24)
- HTML datalist, dialog, fieldset (25, 27, 28)
- HTML tables and SVG (30, 32)
- HTML marquee (31)
- Welcome module (00-welcome.json)

Fixes validation inconsistencies and removes extra content that exceeded
English source. German translations were largely correct; Polish, Spanish,
Arabic, and Ukrainian required full translations.

lessons/ar/31-html-marquee.json

@@ -2,15 +2,15 @@
 	"$schema": "../../schemas/code-crispies-module-schema.json",
 	"id": "html-marquee",
 	"title": "HTML Marquee",
-	"description": "Create scrolling text with the classic (deprecated but fun!) marquee element",
+	"description": "أنشئ نصاً متحركاً باستخدام عنصر marquee الكلاسيكي (قديم لكنه ممتع!)",
 	"mode": "html",
 	"difficulty": "beginner",
 	"lessons": [
 		{
 			"id": "marquee-basic",
-			"title": "Scrolling Text",
-			"description": "The <kbd>&lt;marquee&gt;</kbd> element creates scrolling text - a classic from the early web! While deprecated, it still works in most browsers.<br><br>Note: For production, use CSS animations instead. But for learning and fun, marquee is great!",
-			"task": "Create a simple marquee:<br>1. Add a <kbd>&lt;marquee&gt;</kbd> element<br>2. Put some text inside like <code>Welcome to my website!</code>",
+			"title": "النص المتحرك",
+			"description": "عنصر <kbd>&lt;marquee&gt;</kbd> ينشئ نصاً متحركاً - كلاسيكي من الويب القديم! رغم أنه قديم، لا يزال يعمل في معظم المتصفحات.<br><br>ملاحظة: للإنتاج، استخدم حركات CSS بدلاً منه. لكن للتعلم والمرح، marquee رائع!",
+			"task": "أنشئ marquee بسيط:<br>1. أضف عنصر <kbd>&lt;marquee&gt;</kbd><br>2. ضع نصاً بداخله مثل <code>مرحباً بك في موقعي!</code>",
 			"previewHTML": "",
 			"previewBaseCSS": "body { font-family: system-ui; padding: 20px; background: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%); min-height: 150px; display: flex; align-items: center; } marquee { font-size: 2rem; color: #00ff00; text-shadow: 0 0 10px #00ff00, 0 0 20px #00ff00; font-family: 'Courier New', monospace; }",
 			"sandboxCSS": "",
@@ -21,15 +21,15 @@
 				{
 					"type": "element_exists",
 					"value": "marquee",
-					"message": "Add a <kbd>&lt;marquee&gt;</kbd> element"
+					"message": "أضف عنصر <kbd>&lt;marquee&gt;</kbd>"
 				}
 			]
 		},
 		{
 			"id": "marquee-direction",
-			"title": "Direction & Behavior",
-			"description": "Control the marquee with attributes:<br>• <kbd>direction</kbd>: left, right, up, down<br>• <kbd>behavior</kbd>: scroll (default), slide (stops at edge), alternate (bounces)<br>• <kbd>scrollamount</kbd>: speed (default is 6)",
-			"task": "Create a bouncing marquee:<br>1. Add a <kbd>&lt;marquee&gt;</kbd> element<br>2. Set <kbd>behavior=\"alternate\"</kbd> to make it bounce<br>3. Add some fun text",
+			"title": "الاتجاه والسلوك",
+			"description": "تحكم في marquee باستخدام السمات:<br>• <kbd>direction</kbd>: left، right، up، down<br>• <kbd>behavior</kbd>: scroll (افتراضي)، slide (يتوقف عند الحافة)، alternate (يرتد)<br>• <kbd>scrollamount</kbd>: السرعة (الافتراضي 6)",
+			"task": "أنشئ marquee مرتداً:<br>1. أضف عنصر <kbd>&lt;marquee&gt;</kbd><br>2. اضبط <kbd>behavior=\"alternate\"</kbd> ليرتد<br>3. أضف نصاً ممتعاً",
 			"previewHTML": "",
 			"previewBaseCSS": "body { font-family: system-ui; padding: 20px; background: linear-gradient(135deg, #ff6b6b 0%, #feca57 100%); min-height: 150px; display: flex; align-items: center; } marquee { font-size: 2.5rem; color: white; text-shadow: 2px 2px 4px rgba(0,0,0,0.3); font-weight: bold; }",
 			"sandboxCSS": "",
@@ -40,20 +40,20 @@
 				{
 					"type": "element_exists",
 					"value": "marquee",
-					"message": "Add a <kbd>&lt;marquee&gt;</kbd> element"
+					"message": "أضف عنصر <kbd>&lt;marquee&gt;</kbd>"
 				},
 				{
 					"type": "attribute_value",
 					"value": { "selector": "marquee", "attr": "behavior", "value": "alternate" },
-					"message": "Add <kbd>behavior=</kbd>\"alternate\" to make it bounce"
+					"message": "أضف <kbd>behavior=</kbd>\"alternate\" ليرتد"
 				}
 			]
 		},
 		{
 			"id": "marquee-retro",
-			"title": "Retro News Ticker",
-			"description": "Combine multiple marquee attributes for a classic news ticker effect. You can even put multiple elements inside!<br><br>Remember: This is deprecated HTML. Modern sites use CSS animations, but marquee is great for understanding web history.",
-			"task": "Create a news ticker:<br>1. A <kbd>&lt;marquee&gt;</kbd> with <kbd>direction=\"left\"</kbd><br>2. Set <kbd>scrollamount=\"5\"</kbd> for smooth scrolling<br>3. Add a breaking news headline inside",
+			"title": "شريط أخبار كلاسيكي",
+			"description": "اجمع عدة سمات marquee لتأثير شريط أخبار كلاسيكي. يمكنك حتى وضع عناصر متعددة بداخله!<br><br>تذكر: هذا HTML قديم. المواقع الحديثة تستخدم حركات CSS، لكن marquee رائع لفهم تاريخ الويب.",
+			"task": "أنشئ شريط أخبار:<br>1. عنصر <kbd>&lt;marquee&gt;</kbd> مع <kbd>direction=\"left\"</kbd><br>2. اضبط <kbd>scrollamount=\"5\"</kbd> للتمرير السلس<br>3. أضف عنواناً إخبارياً عاجلاً بداخله",
 			"previewHTML": "",
 			"previewBaseCSS": "body { font-family: system-ui; padding: 0; margin: 0; background: #1a1a2e; } marquee { background: linear-gradient(90deg, #c0392b 0%, #e74c3c 50%, #c0392b 100%); padding: 15px 0; font-size: 1.3rem; color: white; font-weight: 500; text-transform: uppercase; letter-spacing: 1px; border-top: 3px solid #f1c40f; border-bottom: 3px solid #f1c40f; }",
 			"sandboxCSS": "",
@@ -64,17 +64,17 @@
 				{
 					"type": "element_exists",
 					"value": "marquee",
-					"message": "Add a <kbd>&lt;marquee&gt;</kbd> element"
+					"message": "أضف عنصر <kbd>&lt;marquee&gt;</kbd>"
 				},
 				{
 					"type": "attribute_value",
 					"value": { "selector": "marquee", "attr": "direction", "value": "left" },
-					"message": "Add <kbd>direction=</kbd>\"left\" for horizontal scrolling"
+					"message": "أضف <kbd>direction=</kbd>\"left\" للتمرير الأفقي"
 				},
 				{
 					"type": "attribute_value",
 					"value": { "selector": "marquee", "attr": "scrollamount", "value": "5" },
-					"message": "Add <kbd>scrollamount=</kbd>\"5\" for smooth speed"
+					"message": "أضف <kbd>scrollamount=</kbd>\"5\" لسرعة سلسة"
 				}
 			]
 		}