refactor: enhance licitacoes page layout and add contratos permissions

- Improved the layout of the licitacoes page for better readability and user experience.
- Added new permissions for contratos, including listar, criar, editar, excluir, and ver actions.
- Introduced a new schema for contratos with relevant fields and indexes to support contract management.

packages/backend/convex/schema.ts

@@ -120,7 +120,40 @@ export const reportStatus = v.union(
   v.literal("falhou")
 );
 
+export const situacaoContrato = v.union(
+  v.literal("em_execucao"),
+  v.literal("rescendido"),
+  v.literal("aguardando_assinatura"),
+  v.literal("finalizado")
+);
+
 export default defineSchema({
+  contratos: defineTable({
+    contratadaId: v.id("empresas"),
+    objeto: v.string(),
+    numeroNotaEmpenho: v.string(),
+    responsavelId: v.id("funcionarios"),
+    departamento: v.string(),
+    situacao: situacaoContrato,
+    numeroProcessoLicitatorio: v.string(),
+    modalidade: v.string(),
+    numeroContrato: v.string(),
+    anoContrato: v.number(),
+    dataInicioVigencia: v.string(),
+    dataFimVigencia: v.string(),
+    nomeFiscal: v.string(),
+    valorTotal: v.string(),
+    dataAditivoPrazo: v.optional(v.string()),
+    diasAvisoVencimento: v.number(),
+    criadoPor: v.id("usuarios"),
+    criadoEm: v.number(),
+    atualizadoEm: v.optional(v.number()),
+  })
+    .index("by_responsavel", ["responsavelId"])
+    .index("by_situacao", ["situacao"])
+    .index("by_vigencia_inicio", ["dataInicioVigencia"])
+    .index("by_vigencia_fim", ["dataFimVigencia"]),
+
   todos: defineTable({
     text: v.string(),
     completed: v.boolean(),