fix(GRO-1208): remove unused isNull and AppEnv imports

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/__tests__/conversations.test.ts

@@ -178,8 +178,6 @@ vi.mock("../services/messaging/outbound.js", () => ({
 
 // ─── App setup ────────────────────────────────────────────────────────────────
 
-import type { AppEnv } from "../middleware/rbac.js";
-
 const { conversationsRouter } = await import("../routes/conversations.js");
 
 const app = new Hono();

apps/api/src/routes/conversations.ts

@@ -12,7 +12,6 @@ import {
   messages,
   clients,
   businessSettings,
-  isNull,
 } from "@groombook/db";
 import type { AppEnv } from "../middleware/rbac.js";
 import { sendMessage } from "../services/messaging/outbound.js";