chore: 불필요한 코드 정리

Author: 김민서

week1/src/components/TodoCard.tsx

@@ -13,7 +13,7 @@ export default function TodoCard({ text, checked, onToggle, onDelete }: TodoCard
           type="checkbox"
           checked={checked}
           onChange={onToggle}
-          className="sr-only todo-input-control"
+          className="sr-only"
         />
         <span className={`todo-checkbox ${checked ? "is-checked" : ""}`} aria-hidden="true">
           {checked ? "✓" : ""}

week1/styles.css

@@ -105,8 +105,7 @@ body {
   color: #9ca3af;
 }
 
-.todo-input:focus,
-.todo-input.is-focused {
+.todo-input:focus {
   border-color: var(--blue);
   box-shadow: 0 0 0 4px rgba(74, 134, 247, 0.18);
 }