Add multilingual language and systems learning tracks

en/expanded-8-2/lesson-1/main.html

@@ -0,0 +1,5 @@
+<!doctype html>
+<html lang="en"><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1">
+<title>Agila study</title>
+<main><h1>Study time</h1><label for="minutes">Minutes (1–60)</label><input id="minutes" type="number" min="1" max="60"><button id="check">Check</button><p id="result" role="status"></p></main>
+<script>document.getElementById("check").onclick=()=>{const raw=document.getElementById("minutes").value;const n=Number(raw);document.getElementById("result").textContent=raw.trim()!==""&&Number.isInteger(n)&&n>=1&&n<=60?"Ready":"Use a whole number from 1 to 60";};</script></html>