refactor: improve type safety and error handling in vacation management components

- Updated the `AprovarFerias.svelte` component to use specific types for `solicitacao` and `gestorId`, enhancing type safety.
- Improved error handling by refining catch blocks to handle errors more accurately.
- Made minor adjustments to ensure consistent code formatting and readability across the component.

packages/backend/convex/saldoFerias.ts

@@ -87,7 +87,7 @@ function calcularDataFimPeriodo(dataAdmissao: string, anosPassados: number): str
 }
 
 // Helper: Obter regime de trabalho do funcionário
-async function obterRegimeTrabalho(ctx: any, funcionarioId: Id<"funcionarios">): Promise<RegimeTrabalho> {
+async function obterRegimeTrabalho(ctx: QueryCtx, funcionarioId: Id<"funcionarios">): Promise<RegimeTrabalho> {
   const funcionario = await ctx.db.get(funcionarioId);
   return funcionario?.regimeTrabalho || "clt"; // Default CLT
 }