feat: enhance vacation optimization logic and UI components

src/app/components/user-input/user-input.scss

@@ -83,3 +83,21 @@ form {
 	margin: 0;
 	font-weight: normal;
 }
+
+.action-buttons {
+	display: flex;
+	flex-direction: row;
+	justify-content: space-between;
+	align-items: center;
+	margin-bottom: 1rem;
+	gap: 1rem;
+}
+
+.warning {
+	display: flex;
+	flex-direction: column;
+}
+
+:host {
+	max-width: 100%;
+}