fix: show childless headers on admin category page

Makefile

@@ -309,6 +309,21 @@ test-docker:
 test-frontend:
 	$(pnpm_cmd) vitest run
 
+info_xsd_url=https://apps.nextcloud.com/schema/apps/info.xsd
+info_xsd=$(build_tools_directory)/info.xsd
+
+$(info_xsd):
+	@mkdir -p $(build_tools_directory)
+	curl -sS -o $(info_xsd) $(info_xsd_url)
+
+# lint-appinfo:
+#   - Validate appinfo/info.xml against the Nextcloud App Store XSD schema
+.PHONY: lint-appinfo
+lint-appinfo: $(info_xsd)
+	@echo "\x1b[33mValidating appinfo/info.xml against Nextcloud schema...\x1b[0m"
+	@xmllint --noout --schema $(info_xsd) appinfo/info.xml
+	@echo "\x1b[32mappinfo/info.xml is valid.\x1b[0m"
+
 # lint:
 #   - Lint JS via pnpm and PHP via composer script "lint"
 .PHONY: lint

lefthook.yml

@@ -20,3 +20,6 @@ pre-commit:
     openapi:
       glob: "*Controller.php"
       run: make openapi && git add openapi.json
+    lint-appinfo:
+      glob: "appinfo/info.xml"
+      run: make lint-appinfo

lib/Controller/CategoryController.php

@@ -106,13 +106,10 @@ class CategoryController extends OCSController {
 				$categoriesByHeader[$headerId][] = $categoryData;
 			}
 
-			// Build result with nested categories (only include headers that have accessible categories)
+			// Build result with nested categories
 			$result = [];
 			foreach ($headers as $header) {
 				$categories = $categoriesByHeader[$header->getId()] ?? [];
-				if (empty($categories)) {
-					continue;
-				}
 				$headerData = $header->jsonSerialize();
 				$headerData['categories'] = $categories;
 				$result[] = $headerData;