feat: adiciona SLA por empresa e modal de exclusao de automacoes

## SLA por Empresa
- Adiciona tabela companySlaSettings no schema
- Cria convex/companySlas.ts com queries e mutations
- Modifica resolveTicketSlaSnapshot para verificar SLA da empresa primeiro
- Fallback: empresa > categoria > padrao

## Modal de Exclusao de Automacoes
- Substitui confirm() nativo por Dialog gracioso
- Segue padrao do delete-ticket-dialog

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/automations/automations-manager.tsx

@@ -2,7 +2,7 @@
 
 import { useMemo, useState } from "react"
 import { useMutation, useQuery } from "convex/react"
-import { History, MoreHorizontal, Pencil, Plus, Trash2 } from "lucide-react"
+import { AlertTriangle, History, MoreHorizontal, Pencil, Plus, Trash2 } from "lucide-react"
 import { toast } from "sonner"
 
 import { api } from "@/convex/_generated/api"
@@ -12,7 +12,7 @@ import { DEFAULT_TENANT_ID } from "@/lib/constants"
 import { Badge } from "@/components/ui/badge"
 import { Button } from "@/components/ui/button"
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card"
-import { Dialog, DialogTrigger } from "@/components/ui/dialog"
+import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle, DialogTrigger } from "@/components/ui/dialog"
 import { DropdownMenu, DropdownMenuContent, DropdownMenuItem, DropdownMenuTrigger } from "@/components/ui/dropdown-menu"
 import { Input } from "@/components/ui/input"
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select"
@@ -81,6 +81,9 @@ export function AutomationsManager() {
   const [editing, setEditing] = useState<AutomationRow | null>(null)
   const [runsOpen, setRunsOpen] = useState(false)
   const [runsAutomation, setRunsAutomation] = useState<AutomationRow | null>(null)
+  const [deleteOpen, setDeleteOpen] = useState(false)
+  const [deletingAutomation, setDeletingAutomation] = useState<AutomationRow | null>(null)
+  const [deleteLoading, setDeleteLoading] = useState(false)
 
   const list = useQuery(
     api.automations.list,
@@ -134,19 +137,27 @@ export function AutomationsManager() {
     }
   }
 
-  const handleDelete = async (row: AutomationRow) => {
-    if (!convexUserId) return
-    const ok = confirm(`Excluir a automação "${row.name}"?`)
-    if (!ok) return
+  const handleDeleteClick = (row: AutomationRow) => {
+    setDeletingAutomation(row)
+    setDeleteOpen(true)
+  }
+
+  const handleDeleteConfirm = async () => {
+    if (!convexUserId || !deletingAutomation) return
+    setDeleteLoading(true)
     try {
       await removeAutomation({
         tenantId,
         viewerId: convexUserId as Id<"users">,
-        automationId: row.id,
+        automationId: deletingAutomation.id,
       })
       toast.success("Automação excluída")
+      setDeleteOpen(false)
+      setDeletingAutomation(null)
     } catch (error) {
       toast.error(error instanceof Error ? error.message : "Falha ao excluir automação")
+    } finally {
+      setDeleteLoading(false)
     }
   }
 
@@ -340,7 +351,7 @@ export function AutomationsManager() {
                               <Pencil className="size-4" />
                               Editar
                             </DropdownMenuItem>
-                            <DropdownMenuItem variant="destructive" onClick={() => handleDelete(row)} className="gap-2">
+                            <DropdownMenuItem variant="destructive" onClick={() => handleDeleteClick(row)} className="gap-2">
                               <Trash2 className="size-4" />
                               Excluir
                             </DropdownMenuItem>
@@ -355,6 +366,31 @@ export function AutomationsManager() {
           </div>
         )}
       </CardContent>
+
+      {/* Modal de confirmação de exclusão */}
+      <Dialog open={deleteOpen} onOpenChange={(open) => {
+        setDeleteOpen(open)
+        if (!open) setDeletingAutomation(null)
+      }}>
+        <DialogContent className="max-w-md">
+          <DialogHeader>
+            <DialogTitle className="flex items-center gap-2 text-destructive">
+              <AlertTriangle className="size-5" /> Excluir automação
+            </DialogTitle>
+            <DialogDescription>
+              Esta ação é permanente e removerá a automação <span className="font-semibold text-neutral-700">&quot;{deletingAutomation?.name}&quot;</span> e todo o seu histórico de execuções.
+            </DialogDescription>
+          </DialogHeader>
+          <div className="flex justify-end gap-2 pt-2">
+            <Button variant="outline" onClick={() => setDeleteOpen(false)} disabled={deleteLoading}>
+              Cancelar
+            </Button>
+            <Button variant="destructive" onClick={handleDeleteConfirm} disabled={deleteLoading} className="gap-2">
+              {deleteLoading ? "Excluindo..." : (<><Trash2 className="size-4" /> Excluir</>)}
+            </Button>
+          </div>
+        </DialogContent>
+      </Dialog>
     </Card>
   )
 }