feat: migrate auth stack and admin portal

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

web/convex/rbac.ts

@@ -0,0 +1,53 @@
+import { ConvexError } from "convex/values"
+
+import type { Id } from "./_generated/dataModel"
+import type { MutationCtx, QueryCtx } from "./_generated/server"
+
+const STAFF_ROLES = new Set(["ADMIN", "MANAGER", "AGENT", "COLLABORATOR"])
+const CUSTOMER_ROLE = "CUSTOMER"
+
+type Ctx = QueryCtx | MutationCtx
+
+function normalizeRole(role?: string | null) {
+  return role?.toUpperCase() ?? null
+}
+
+async function getUser(ctx: Ctx, userId: Id<"users">) {
+  const user = await ctx.db.get(userId)
+  if (!user) {
+    throw new ConvexError("Usuário não encontrado")
+  }
+  return user
+}
+
+export async function requireUser(ctx: Ctx, userId: Id<"users">, tenantId?: string) {
+  const user = await getUser(ctx, userId)
+  if (tenantId && user.tenantId !== tenantId) {
+    throw new ConvexError("Usuário não pertence a este tenant")
+  }
+  return { user, role: normalizeRole(user.role) }
+}
+
+export async function requireStaff(ctx: Ctx, userId: Id<"users">, tenantId?: string) {
+  const result = await requireUser(ctx, userId, tenantId)
+  if (!result.role || !STAFF_ROLES.has(result.role)) {
+    throw new ConvexError("Acesso restrito à equipe interna")
+  }
+  return result
+}
+
+export async function requireAdmin(ctx: Ctx, userId: Id<"users">, tenantId?: string) {
+  const result = await requireStaff(ctx, userId, tenantId)
+  if (result.role !== "ADMIN") {
+    throw new ConvexError("Apenas administradores podem executar esta ação")
+  }
+  return result
+}
+
+export async function requireCustomer(ctx: Ctx, userId: Id<"users">, tenantId?: string) {
+  const result = await requireUser(ctx, userId, tenantId)
+  if (result.role !== CUSTOMER_ROLE) {
+    throw new ConvexError("Acesso restrito ao portal do cliente")
+  }
+  return result
+}