fix: BUG-080/082 (20 unused frontend components deleted), BUG-083 (useTenant.ts deleted), BUG-011 (playwright baseURL), BUG-069 (unused python modules deleted), BUG-065 (already has eager loading), BUG-026 (already fixed 422), BUG-023 (no sync I/O found)

frontend/src/components/contacts/ContactList.tsx

@@ -1256,7 +1256,7 @@ export function ContactList({
   };
 
   return (
-    <div data-testid="contact-list" className="flex flex-col h-full" data-testid="contact-cards-view">
+    <div data-testid="contact-cards-view" className="flex flex-col h-full">
       <div ref={scrollRef} className="flex-1 overflow-y-auto p-3">
         {isGrouped && groupedContacts ? (
           <div className="space-y-4">