Greatly reduce repeated code

functions/api/appeals/toggle.ts

@@ -1,22 +1,14 @@
+import { jsonError } from "../../common.js";
+
 export async function onRequestPost(context: RequestContext) {
   const { active } = context.data.body;
   const { permissions } = context.data.current_user;
 
   if (!(permissions & (1 << 0)) && !(permissions & (1 << 11)))
-    return new Response('{"error":"Forbidden"}', {
-      headers: {
-        "content-type": "application/json",
-      },
-      status: 403,
-    });
+    return jsonError("Forbidden", 403);
 
   if (typeof active !== "boolean")
-    return new Response('{"error":"Active property must be a boolean"}', {
-      headers: {
-        "content-type": "application/json",
-      },
-      status: 400,
-    });
+    return jsonError("Active property must be a boolean", 400);
 
   if (active) {
     await context.env.DATA.delete("appeal_disabled");