refactor: enhance vacation request component and improve error handling

- Updated the SolicitarFerias component to improve the user interface and experience.
- Added validation for overlapping vacation periods and ensured proper error messages are displayed.
- Refactored the logic for adding and removing vacation periods, enhancing code readability and maintainability.
- Improved the handling of form submission and error states for better user feedback.

packages/backend/convex/monitoramento.ts

@@ -139,25 +139,6 @@ export const configurarAlerta = mutation({
  */
 export const listarAlertas = query({
 	args: {},
-	returns: v.array(
-		v.object({
-			_id: v.id('alertConfigurations'),
-			metricName: v.string(),
-			threshold: v.number(),
-			operator: v.union(
-				v.literal('>'),
-				v.literal('<'),
-				v.literal('>='),
-				v.literal('<='),
-				v.literal('==')
-			),
-			enabled: v.boolean(),
-			notifyByEmail: v.boolean(),
-			notifyByChat: v.boolean(),
-			createdBy: v.id('usuarios'),
-			lastModified: v.number()
-		})
-	),
 	handler: async (ctx) => {
 		const alertas = await ctx.db.query('alertConfigurations').collect();
 		return alertas;