Filters are arrays.

sveltejs/src/ProjectBrowser.svelte

@@ -94,15 +94,15 @@
     }
     async function showRecommended() {
         tab = 'recommended';
-        $filters.maintenanceStatus = ACTIVELY_MAINTAINED;
-        $filters.securityCoverage = COVERED;
+        $filters.maintenanceStatus = [ACTIVELY_MAINTAINED];
+        $filters.securityCoverage = [COVERED];
         await load(0);
     }
 
     async function showAll() {
         tab = 'all';
-        $filters.maintenanceStatus = "";
-        $filters.securityCoverage = "";
+        $filters.maintenanceStatus = [];
+        $filters.securityCoverage = [];
         await load(0);
     }