Update web/templates/stats.html

web/templates/stats.html

@@ -160,6 +160,31 @@
           </form>
           {% endif %}
         </div>
+      </div>
+    <div class="tool-card">
+  <h4 style="margin:0 0 6px;">Subject Normalizer</h4>
+  <p class="small muted" style="margin:0 0 8px;">
+    Normalize the <strong>Subject</strong> field so individual subjects are comma-separated.
+    Preserves multi-word subjects; lightly fixes separators like “;” and spaced dashes.
+    Uses your <code>subjects.txt</code> catalog when available.
+  </p>
+
+  <form method="get" action="{% url 'normalize_subjects' %}" style="display:inline;">
+    <input type="number" min="0" name="limit"
+           placeholder="Preview limit (optional)"
+           style="border:1px solid var(--border); border-radius:8px; padding:6px 8px;">
+    <button class="btn">Dry-run Preview</button>
+  </form>
+
+  {% if user.is_authenticated and user.is_staff %}
+  <form method="post" action="{% url 'normalize_subjects' %}" style="display:inline; margin-left:8px;">
+    {% csrf_token %}
+    <button class="btn btn-danger"
+            onclick="return confirm('Apply subject normalization to all entries? This cannot be undone. Make a backup first.')">
+      Apply to All
+    </button>
+  </form>
+  {% endif %}
 </div>
     </div>
   </div>