branch-coexist: 3 neue decks 223015b-2026 / 223015c-2026 / dhbw-2026 daneben main

per user-request einen branch der main-content UND rewrite-content trägt — saubere separierung statt symlink/merge-conflict.

struktur:
- slides/<course>/ → main-content restored, eigene assets (kein new-demo-leak)
- slides/<course>-2026/ → rewrite-content, eigene assets (komplett kopiert + new demos)

Makefile: COURSES += 223015b-2026 223015c-2026 dhbw-2026 mit eigenen NAME/KAPITEL/DEPLOY/KLAUSUR-konfig. Klausur für b+c=1, dhbw=leer. Deploy-paths /hdm/223015b-2026 etc.

make build durchlaufen für alle 6 decks, 0 fehler.

dedup: 223015c+dhbw assets identisch in beiden ordnern (kein neu-demos auf b ergänzt). 223015b 86 → 120 files in -2026 (= +34 neue eroeffner/usb-c-drei-achsen/container-vs-codec/etc).

slides/223015c-2026/assets/demos/js-arrays.html

@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<html lang="de">
+<head>
+  <meta charset="UTF-8">
+  <title>Arrays</title>
+  <style>
+    body { margin: 0; padding: 14px 16px; font-family: ui-monospace, monospace; background: #fff; font-size: 0.95rem; }
+    .row { padding: 4px 0; border-bottom: 1px solid #f3f4f6; display: flex; gap: 8px; }
+    .prompt { color: #9ca3af; }
+    .num { color: #1e40af; }
+    .str { color: #15803d; }
+    .out { color: #6b7280; font-style: italic; }
+    .arr { display: inline-flex; gap: 2px; }
+    .cell {
+      border: 1px solid #d1d5db;
+      padding: 2px 8px;
+      border-radius: 3px;
+      background: #f9fafb;
+    }
+    .idx { font-size: 0.65rem; color: #9ca3af; text-align: center; }
+  </style>
+</head>
+<body>
+  <div class="row"><span class="prompt">&gt;</span><span>const f = [<span class="str">"🍎"</span>, <span class="str">"🍌"</span>, <span class="str">"🍒"</span>];</span></div>
+  <div style="margin: 8px 0 10px;">
+    <div class="arr">
+      <div><div class="cell">🍎</div><div class="idx">0</div></div>
+      <div><div class="cell">🍌</div><div class="idx">1</div></div>
+      <div><div class="cell">🍒</div><div class="idx">2</div></div>
+    </div>
+  </div>
+  <div class="row"><span class="prompt">&gt;</span><span>f[<span class="num">0</span>];</span></div>
+  <div class="row"><span class="prompt">←</span><span class="out"><span class="str">"🍎"</span></span></div>
+  <div class="row"><span class="prompt">&gt;</span><span>f.length;</span></div>
+  <div class="row"><span class="prompt">←</span><span class="out"><span class="num">3</span></span></div>
+  <div class="row"><span class="prompt">&gt;</span><span>f.push(<span class="str">"🍇"</span>);</span></div>
+  <div class="row"><span class="prompt">←</span><span class="out"><span class="num">4</span></span></div>
+</body>
+</html>