Add HTMX endpoint for truncating series images and corresponding result template

atlas/templates/atlas/partials/truncate_result.html

@@ -0,0 +1,10 @@
+<div class="alert alert-success">
+    <strong>Truncate complete.</strong>
+    <div class="small mt-1">Removed {{ images_removed|length }} images from series {{ series.pk }}.</div>
+</div>
+{% if images_removed %}
+    <details class="mt-2">
+        <summary class="small">Show removed image IDs</summary>
+        <div class="small mt-1">{{ images_removed|join:", " }}</div>
+    </details>
+{% endif %}

atlas/templates/atlas/series_viewer.html

@@ -251,8 +251,10 @@
                     return;
                 }
 
-                if(confirm(`Trucated series. This will leave ${upper_bound - lower_bound + 1} images.`) == true) {
-                    htmx.ajax("GET", `{% url 'api-1:series_truncate' series.id '****' '++++' %}`.replace("****", lower_bound).replace("++++", upper_bound), "#truncate-output")
+                    if(confirm(`Trucated series. This will leave ${upper_bound - lower_bound + 1} images.`) == true) {
+                    const truncateTemplate = `{% url 'atlas:series_truncate' series.id 0 0 %}`; // e.g. /atlas/series/920/truncate/0/0/
+                    const truncateUrl = truncateTemplate.replace('/0/0/', `/${lower_bound}/${upper_bound}/`);
+                    htmx.ajax("GET", truncateUrl, "#truncate-output")
 
                 }