Remove unused templates for newsletter creation, settings, and submissions; update unsubscribe confirmation link; add tests for email templates API.

templates/admin/admin_settings.html

@@ -0,0 +1,59 @@
+{% extends "_base.html" %} {% block title %}Settings{% endblock %} {% block
+heading %}Application Settings{% endblock %} {% block extra_styles %}
+<link rel="stylesheet" href="/static/css/admin.css" />
+{% endblock %} {% block content %}
+<div class="settings-cards">
+  {% for category, category_settings in settings.items() %}
+  <div class="settings-card">
+    <h2 class="card-title">{{ category }}</h2>
+    <div class="card-body">
+      {% for key, value in category_settings.items() %}
+      <div class="setting"><strong>{{ key }}:</strong> {{ value }}</div>
+      {% endfor %}
+    </div>
+  </div>
+  {% endfor %}
+</div>
+
+<div class="settings-management">
+  <h2>Dynamic Settings Management</h2>
+
+  <div id="message"></div>
+
+  <div class="settings-list" id="settingsList">
+    <p>Loading settings...</p>
+  </div>
+
+  <h3>Add New Setting</h3>
+  <form id="addSettingForm">
+    <div class="form-row">
+      <div class="form-group">
+        <label for="newKey">Setting Key:</label>
+        <input
+          type="text"
+          id="newKey"
+          name="key"
+          required
+          placeholder="e.g., maintenance_mode"
+        />
+      </div>
+      <div class="form-group">
+        <label for="newValue">Setting Value:</label>
+        <input
+          type="text"
+          id="newValue"
+          name="value"
+          required
+          placeholder="e.g., false"
+        />
+      </div>
+      <div class="form-group">
+        <button type="submit" class="btn btn-primary">Add Setting</button>
+      </div>
+    </div>
+  </form>
+</div>
+
+{% endblock %} {% block extra_scripts %}
+<script src="/static/js/admin.js"></script>
+{% endblock %}