feat: checklists em tickets + automações

- Adiciona checklist no ticket (itens obrigatórios/opcionais) e bloqueia encerramento com pendências\n- Cria templates de checklist (globais/por empresa) + tela em /settings/checklists\n- Nova ação de automação: aplicar template de checklist\n- Corrige crash do Select (value vazio), warnings de Dialog e dimensionamento de charts\n- Ajusta SMTP (STARTTLS) e melhora teste de integração

convex/schema.ts

@@ -309,6 +309,22 @@ export default defineSchema({
     ),
     formTemplate: v.optional(v.string()),
     formTemplateLabel: v.optional(v.string()),
+    checklist: v.optional(
+      v.array(
+        v.object({
+          id: v.string(),
+          text: v.string(),
+          done: v.boolean(),
+          required: v.optional(v.boolean()),
+          templateId: v.optional(v.id("ticketChecklistTemplates")),
+          templateItemId: v.optional(v.string()),
+          createdAt: v.optional(v.number()),
+          createdBy: v.optional(v.id("users")),
+          doneAt: v.optional(v.number()),
+          doneBy: v.optional(v.id("users")),
+        })
+      )
+    ),
     relatedTicketIds: v.optional(v.array(v.id("tickets"))),
     resolvedWithTicketId: v.optional(v.id("tickets")),
     reopenDeadline: v.optional(v.number()),
@@ -633,6 +649,28 @@ export default defineSchema({
     .index("by_tenant_key", ["tenantId", "key"])
     .index("by_tenant_active", ["tenantId", "isArchived"]),
 
+  ticketChecklistTemplates: defineTable({
+    tenantId: v.string(),
+    name: v.string(),
+    description: v.optional(v.string()),
+    companyId: v.optional(v.id("companies")),
+    items: v.array(
+      v.object({
+        id: v.string(),
+        text: v.string(),
+        required: v.optional(v.boolean()),
+      })
+    ),
+    isArchived: v.optional(v.boolean()),
+    createdAt: v.number(),
+    updatedAt: v.number(),
+    createdBy: v.optional(v.id("users")),
+    updatedBy: v.optional(v.id("users")),
+  })
+    .index("by_tenant", ["tenantId"])
+    .index("by_tenant_company", ["tenantId", "companyId"])
+    .index("by_tenant_active", ["tenantId", "isArchived"]),
+
   userInvites: defineTable({
     tenantId: v.string(),
     inviteId: v.string(),