special galleries: add tests; make special breadcrumb clickable; highlight active special; hide back only

viewer/directory.py

@@ -220,7 +220,16 @@ def render_directory(request, path_text, full_path, special=None):
         # expose which special is active so templates can highlight it
         context["active_special"] = special
         # Override breadcrumbs for special galleries to be a single label
-        context["breadcrumbs"] = [{"label": context["special_name"], "path": None}]
+        # and make it link to the special gallery root so templates can show
+        # it as an active, clickable breadcrumb.
+        from .specials import special_root_url
+
+        context["breadcrumbs"] = [
+            {
+                "label": context["special_name"],
+                "path": special_root_url(special, query_state),
+            }
+        ]
         # Hide the search box (templates use `is_special` to decide)
         context["search_text"] = ""
         context["search_action_url"] = ""