Plakette als Favicon

Sie bringt ihre eigene dunkle Platte mit und steht damit in hellen wie
dunklen Browserreitern, anders als die freistehende Wortmarke.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

static/img/logo/jet-plakette.svg

@@ -0,0 +1,9 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" role="img" aria-label="Jet-Design">
+  <title>Jet-Design</title>
+  <!-- Zeichen fuer den Browserreiter: dunkle Platte mit weissen
+       Buchstaben, wie das Schild selbst. Die Platte traegt die
+       Schrift und macht das Zeichen unabhaengig davon, ob der
+       Reiter hell oder dunkel ist. -->
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