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

templates/admin/admin_newsletter_create.html

@@ -0,0 +1,98 @@
+{% extends "_base.html" %} {% block title %}Create Newsletter{% endblock %} {%
+block heading %}Create Newsletter{% endblock %} {% block extra_styles %}
+<link rel="stylesheet" href="/static/css/admin.css" /> {% endblock %} {% block
+content %}
+<div id="message"></div>
+
+<div class="newsletter-stats">
+  <div class="stat-card">
+    <h4>Total Subscribers</h4>
+    <div class="number" id="totalSubscribers">--</div>
+  </div>
+  <div class="stat-card">
+    <h4>Active Subscribers</h4>
+    <div class="number" id="activeSubscribers">--</div>
+  </div>
+  <div class="stat-card">
+    <h4>Last Sent</h4>
+    <div class="number" id="lastSent">--</div>
+  </div>
+</div>
+
+<form id="newsletterForm">
+  <div class="form-section">
+    <h2>Newsletter Details</h2>
+    <div class="form-row">
+      <div class="form-group">
+        <label for="subject">Subject Line *</label>
+        <input
+          type="text"
+          id="subject"
+          name="subject"
+          required
+          placeholder="Enter newsletter subject"
+        />
+      </div>
+      <div class="form-group">
+        <label for="senderName">Sender Name</label>
+        <input
+          type="text"
+          id="senderName"
+          name="sender_name"
+          placeholder="Your Name"
+        />
+      </div>
+    </div>
+    <div class="form-group">
+      <label for="content">Content *</label>
+      <textarea
+        id="content"
+        name="content"
+        required
+        placeholder="Write your newsletter content here..."
+      ></textarea>
+    </div>
+    <div class="form-row">
+      <div class="form-group">
+        <label for="sendDate">Send Date (optional)</label>
+        <input type="datetime-local" id="sendDate" name="send_date" />
+      </div>
+      <div class="form-group">
+        <label for="status">Status</label>
+        <select id="status" name="status">
+          <option value="draft">Draft</option>
+          <option value="scheduled">Scheduled</option>
+          <option value="sent">Sent</option>
+        </select>
+      </div>
+    </div>
+  </div>
+
+  <div class="form-section">
+    <h2>Actions</h2>
+    <button
+      type="button"
+      class="btn btn-secondary"
+      onclick="previewNewsletter()"
+    >
+      Preview
+    </button>
+    <button type="button" class="btn btn-primary" onclick="saveDraft()">
+      Save Draft
+    </button>
+    <button type="button" class="btn btn-success" onclick="sendNewsletter()">
+      Send Newsletter
+    </button>
+    <button type="button" class="btn btn-danger" onclick="clearForm()">
+      Clear
+    </button>
+  </div>
+</form>
+
+<div id="previewSection" class="newsletter-preview hidden">
+  <h3>Newsletter Preview</h3>
+  <div id="previewContent"></div>
+</div>
+{% endblock %}{% block extra_scripts %}
+<script src="/static/js/admin.js"></script>
+{% endblock %}