refactor: move nav items to base navbar template

Consolidate navigation items into the base navbar template instead of
requiring each app to override nav blocks. Nav links are now conditionally
rendered based on authentication status, removing the need for duplicate
nav block definitions in dashboard.html.

mnemosyne/mnemosyne/templates/mnemosyne/dashboard.html

@@ -1,21 +1,5 @@
 {% extends "themis/base.html" %}
 
-{% block nav_items_desktop %}
-<li><a href="{% url 'dashboard' %}" class="font-semibold">Dashboard</a></li>
-<li><a href="{% url 'library:library-list' %}">Libraries</a></li>
-<li><a href="{% url 'library:search' %}">Search</a></li>
-<li><a href="{% url 'llm_manager:dashboard' %}">LLM Manager</a></li>
-<li><a href="{% url 'themis:key-list' %}">API Keys</a></li>
-{% endblock %}
-
-{% block nav_items %}
-<li><a href="{% url 'dashboard' %}">Dashboard</a></li>
-<li><a href="{% url 'library:library-list' %}">Libraries</a></li>
-<li><a href="{% url 'library:search' %}">Search</a></li>
-<li><a href="{% url 'llm_manager:dashboard' %}">LLM Manager</a></li>
-<li><a href="{% url 'themis:key-list' %}">API Keys</a></li>
-{% endblock %}
-
 {% block title %}Dashboard — Mnemosyne{% endblock %}
 
 {% block content %}

mnemosyne/themis/templates/themis/includes/navbar.html

@@ -13,7 +13,15 @@
             <ul tabindex="0"
                 class="menu menu-sm dropdown-content bg-base-200 rounded-box z-10 mt-3 w-52 p-2 shadow">
                 {% block nav_items_mobile %}
-                {% block nav_items %}{% endblock %}
+                {% block nav_items %}
+                {% if user.is_authenticated %}
+                <li><a href="{% url 'dashboard' %}">Dashboard</a></li>
+                <li><a href="{% url 'library:library-list' %}">Libraries</a></li>
+                <li><a href="{% url 'library:search' %}">Search</a></li>
+                <li><a href="{% url 'llm_manager:dashboard' %}">LLM Manager</a></li>
+                <li><a href="{% url 'themis:key-list' %}">API Keys</a></li>
+                {% endif %}
+                {% endblock %}
                 {% endblock %}
             </ul>
         </div>
@@ -28,7 +36,13 @@
     <div class="navbar-center hidden lg:flex">
         <ul class="menu menu-horizontal px-1">
             {% block nav_items_desktop %}
-            <!-- Apps fill this block with their nav items -->
+            {% if user.is_authenticated %}
+            <li><a href="{% url 'dashboard' %}">Dashboard</a></li>
+            <li><a href="{% url 'library:library-list' %}">Libraries</a></li>
+            <li><a href="{% url 'library:search' %}">Search</a></li>
+            <li><a href="{% url 'llm_manager:dashboard' %}">LLM Manager</a></li>
+            <li><a href="{% url 'themis:key-list' %}">API Keys</a></li>
+            {% endif %}
             {% endblock %}
         </ul>
     </div>