Add compass logo with favicon set and quote claim titles in the UI.

Introduces SVG and PNG icon assets with manifest links, and wraps public claim titles in German quotation marks.

Co-authored-by: Cursor <cursoragent@cursor.com>

templates/base.html

@@ -6,6 +6,12 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta name="description" content="{% block meta_description %}Faktenkompass – Überprüfbare Fakten und Quellen.{% endblock %}">
     <title>{% block title %}Faktenkompass{% endblock %}</title>
+    <link rel="icon" href="{% static 'img/favicon.ico' %}" sizes="any">
+    <link rel="icon" href="{% static 'img/favicon.svg' %}" type="image/svg+xml">
+    <link rel="apple-touch-icon" href="{% static 'img/apple-touch-icon.png' %}">
+    <link rel="manifest" href="{% static 'site.webmanifest' %}">
+    <link rel="mask-icon" href="{% static 'img/safari-pinned-tab.svg' %}" color="#0d9488">
+    <meta name="theme-color" content="#0d9488">
     <link rel="preconnect" href="https://fonts.googleapis.com">
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
     <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap" rel="stylesheet">
@@ -28,7 +34,9 @@
     <header class="fk-nav">
         <div class="container fk-nav-inner">
             <a class="fk-brand" href="{% url 'claims:home' %}">
-                <span class="fk-brand-icon"><i class="bi bi-compass"></i></span>
+                <span class="fk-brand-icon">
+                    <img src="{% static 'img/logo.svg' %}" width="28" height="28" alt="">
+                </span>
                 Faktenkompass
             </a>
             <nav class="fk-nav-links" aria-label="Hauptnavigation">