From 11f51944dfc35fcdecb2c67813a04457dbdc1a36 Mon Sep 17 00:00:00 2001
From: Ilia Denisov <evilcart@gmail.com>
Date: Fri, 22 May 2026 15:56:32 +0200
Subject: [PATCH] fix(ui): register the service worker in production only
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SvelteKit's automatic SW registration also runs under `vite dev`, where
the worker intercepted/cached the dev-server e2e suite (42 failures).
Disable auto-registration (kit.serviceWorker.register: false) and
register the worker manually from the root layout guarded by `!dev`, so
`vite dev` and the e2e suite run worker-free while the production build —
and the PWA preview test — still install it.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
---
 ui/frontend/src/routes/+layout.svelte | 7 +++++++
 ui/frontend/svelte.config.js          | 6 ++++++
 2 files changed, 13 insertions(+)

diff --git a/ui/frontend/src/routes/+layout.svelte b/ui/frontend/src/routes/+layout.svelte
index bda93c4..1047743 100644
--- a/ui/frontend/src/routes/+layout.svelte
+++ b/ui/frontend/src/routes/+layout.svelte
@@ -4,6 +4,7 @@
 	import { onMount } from "svelte";
 	import { goto } from "$app/navigation";
 	import { page } from "$app/state";
+	import { dev } from "$app/environment";
 	import { i18n } from "$lib/i18n/index.svelte";
 	import { session } from "$lib/session-store.svelte";
 	import { eventStream } from "../api/events.svelte";
@@ -21,6 +22,12 @@
 
 	onMount(() => {
 		void session.init();
+		// Production-only service-worker registration (auto-register is off
+		// in svelte.config.js) so `vite dev` and the dev-server e2e suite
+		// run without the worker intercepting requests.
+		if (!dev && "serviceWorker" in navigator) {
+			void navigator.serviceWorker.register("/service-worker.js");
+		}
 		return () => {
 			eventStream.stop();
 			streamSessionId = null;
diff --git a/ui/frontend/svelte.config.js b/ui/frontend/svelte.config.js
index 836e7d0..e85780e 100644
--- a/ui/frontend/svelte.config.js
+++ b/ui/frontend/svelte.config.js
@@ -11,5 +11,11 @@ export default {
 			fallback: "index.html",
 			strict: true,
 		}),
+		serviceWorker: {
+			// Registered manually in the root layout for production only.
+			// SvelteKit's auto-registration also runs under `vite dev`, where
+			// the worker would intercept and cache the dev-server e2e suite.
+			register: false,
+		},
 	},
 };