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/hop-chain.html

@@ -0,0 +1,60 @@
+<!DOCTYPE html>
+<html lang="de">
+<head>
+  <meta charset="UTF-8">
+  <title>Hop-Kette</title>
+  <style>
+    html, body { margin: 0; padding: 0; background: #fff; font-family: system-ui, sans-serif; }
+    body { padding: 30px; display: inline-block; }
+    .chain { display: flex; flex-direction: column; align-items: center; gap: 0; }
+    .node {
+      border: 2px solid;
+      border-radius: 6px;
+      padding: 10px 22px;
+      min-width: 260px;
+      text-align: center;
+      font-weight: 600;
+      font-size: 0.95rem;
+    }
+    .laptop { background: #dbeafe; border-color: #1e40af; color: #1e3a8a; }
+    .router { background: #fef3c7; border-color: #ca8a04; color: #713f12; }
+    .server { background: #dcfce7; border-color: #15803d; color: #14532d; }
+    .edge {
+      display: flex;
+      flex-direction: column;
+      align-items: center;
+      margin: 5px 0;
+    }
+    .edge-line {
+      width: 0; height: 0;
+      border-left: 10px solid transparent;
+      border-right: 10px solid transparent;
+      border-top: 14px solid #d63384;
+    }
+    .edge-label {
+      font-size: 0.75rem;
+      color: #d63384;
+      font-style: italic;
+      margin-bottom: 2px;
+    }
+    .dots {
+      color: #9ca3af;
+      font-weight: 700;
+      margin: 2px 0;
+    }
+  </style>
+</head>
+<body>
+  <div class="chain">
+    <div class="node laptop">Ihr Laptop</div>
+    <div class="edge"><div class="edge-label">[Frame an Router 1]</div><div class="edge-line"></div></div>
+    <div class="node router">Router HdM-Netz</div>
+    <div class="edge"><div class="edge-label">[Frame an Router 2]</div><div class="edge-line"></div></div>
+    <div class="node router">Router BelWü</div>
+    <div class="edge"><div class="edge-label">[Frame an Router 3]</div><div class="edge-line"></div></div>
+    <div class="dots">...</div>
+    <div class="edge"><div class="edge-label">[Frame an Server]</div><div class="edge-line"></div></div>
+    <div class="node server">Webserver</div>
+  </div>
+</body>
+</html>