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/port-highlight.html

@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<html lang="de">
+<head>
+  <meta charset="UTF-8">
+  <title>Port-Highlight</title>
+  <style>
+    html, body { margin: 0; padding: 0; background: #fff; font-family: system-ui, sans-serif; }
+    body { padding: 28px 40px; display: inline-block; }
+    .line {
+      font-family: ui-monospace, "SF Mono", monospace;
+      font-size: 2.2rem;
+      color: #1a1a2e;
+      display: flex;
+      align-items: center;
+    }
+    .port-wrap {
+      display: inline-flex;
+      flex-direction: column;
+      align-items: center;
+      margin-left: 4px;
+    }
+    .port {
+      background: #fde68a;
+      color: #7c2d12;
+      padding: 2px 10px;
+      border-radius: 4px;
+      font-weight: 700;
+    }
+    .connector {
+      width: 2px;
+      height: 18px;
+      background: #c2410c;
+      margin-top: 4px;
+    }
+    .caption-text {
+      background: #fed7aa;
+      padding: 6px 12px;
+      border-radius: 4px;
+      border: 2px solid #c2410c;
+      color: #7c2d12;
+      font-weight: 600;
+      font-size: 1rem;
+      font-family: system-ui, sans-serif;
+      margin-top: 2px;
+    }
+  </style>
+</head>
+<body>
+  <div class="line">
+    212.132.79.37:<div class="port-wrap">
+      <span class="port">443</span>
+      <div class="connector"></div>
+      <div class="caption-text">Port 443 = HTTPS</div>
+    </div>
+  </div>
+</body>
+</html>