AIX: client error: describe Failed to fetch

This happens when for instance Chrome queues up a connection, and while still queued
the WiFi goes off.

src/modules/aix/client/aix.client.errors.ts

@@ -50,6 +50,13 @@ export function aixClassifyStreamingError(error: any, isUserAbort: boolean, hasF
   // Initial connection failures, HTTP errors, or text responses that blow up tRPC's JSON parser
   if (error instanceof TRPCClientError) {
     switch (error.cause?.message) {
+      /**
+       * When network is disconnected while a request hasn't started (is queued by the browser).
+       * - repro: queue up > 6 connections, then turn WiFi off (no CSF).
+       */
+      case 'Failed to Fetch':
+        return { errorType: 'net-disconnected', errorMessage: 'An issue occurred: **network error**' };
+
       /**
        * The body of the response was "Request Entity Too Large".
        * - this caused trpc, in ...stream/jsonl.ts, function createConsumerStream, to throw an error due to parsing the line as JSON