Added batch process and test

templates/index.html

@@ -18,11 +18,22 @@
         <button class="btn btn-primary">Run Sync Now</button>
       {% endif %}
     </form>
+    {% if not sync_running %}
+    <form method="post" action="/sync/test" style="display:inline">
+      <button class="btn btn-secondary">Test (1 zip)</button>
+    </form>
+    {% endif %}
   </div>
 </div>
+{% if batch_size > 0 %}
+<p class="muted small" style="margin-bottom:1.5rem">Batch size: {{ batch_size }} zips per chunk — full sync processes all unprocessed files.</p>
+{% endif %}
 
 {% if request.query_params.get("started") %}
-  <div class="alert alert-success">Sync started in background.</div>
+  <div class="alert alert-success">Sync started — processing all unprocessed archives{% if batch_size > 0 %} in batches of {{ batch_size }}{% endif %}.</div>
+{% endif %}
+{% if request.query_params.get("test_started") %}
+  <div class="alert alert-success">Test sync started — processing 1 archive.</div>
 {% endif %}
 {% if request.query_params.get("already_running") %}
   <div class="alert alert-warning">A sync is already running.</div>