fix(website): Handle virtual DocTypes webview routing (#24445) (#24743)

Co-authored-by: Charles-Henri Decultot <chdecultot@dokos.io>
(cherry picked from commit c9c8414)

Co-authored-by: Corentin Flr <10946971+cogk@users.noreply.github.com>

frappe/website/page_renderers/document_page.py

@@ -96,7 +96,13 @@ def _find_matching_document_webview(route: str) -> tuple[str, str] | None:
 			filters[condition_field] = 1
 
 		try:
-			docname = frappe.db.get_value(doctype, filters, "name")
+			docname = None
+			if meta.is_virtual:
+				if doclist := frappe.get_all(doctype, filters=filters, fields=["name"], limit=1):
+					docname = doclist[0].get("name")
+			else:
+				docname = frappe.db.get_value(doctype, filters, "name")
+
 			if docname:
 				return (doctype, docname)
 		except Exception as e: