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-localstorage.html

@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<html lang="de">
+<head>
+  <meta charset="UTF-8">
+  <title>LocalStorage</title>
+  <style>
+    body { font-family: system-ui, sans-serif; padding: 1.5rem; }
+    .card {
+      border: 1px solid #e5e7eb;
+      border-radius: 6px;
+      padding: 14px;
+      margin-bottom: 1rem;
+      background: #f9fafb;
+    }
+    h3 { margin: 0 0 0.4rem; font-size: 0.85rem; color: #6b7280; text-transform: uppercase; letter-spacing: 0.04em; }
+    .kv {
+      display: grid;
+      grid-template-columns: auto 1fr;
+      gap: 6px 14px;
+      font-family: ui-monospace, monospace;
+      font-size: 0.9rem;
+    }
+    .k { color: #7c2d12; font-weight: 700; }
+    .v { color: #14532d; }
+    .reload {
+      background: #dcfce7;
+      border: 2px solid #16a34a;
+      padding: 10px 14px;
+      border-radius: 6px;
+      color: #14532d;
+      font-weight: 600;
+    }
+    .icon { font-size: 1.2em; margin-right: 6px; }
+  </style>
+</head>
+<body>
+  <div class="card">
+    <h3>localStorage</h3>
+    <div class="kv">
+      <div class="k">"name"</div><div class="v">"Max"</div>
+      <div class="k">"settings"</div><div class="v">{"darkMode":true}</div>
+    </div>
+  </div>
+  <div class="reload"><span class="icon">💾</span>Bleibt nach Reload / Browser-Neustart erhalten</div>
+</body>
+</html>