fix(web): the label route was written outside the routes tree, and the PWA promised icons that do not exist

Every label link in the sidebar was dead. The route file landed in
web/web/src/routes/ because the shell that created it was already inside
web/ — SvelteKit never saw it, so /etiket/<name> fell through to the
app shell and rendered nothing.

The manifest also listed icon-192.png and icon-512.png, and app.html an
apple-touch-icon, none of which were ever generated. A manifest pointing
at missing icons is worse than one listing only what exists, so the dead
references are gone and the SVG — which Chrome and Firefox install from
happily — is what remains.

docs: hand over the project

HANDOFF.md covers what cannot be read out of the code: why the name is
not skuld, the decisions that look strange until you know the reason,
what is tested against a real service and what is only tested against
its specification, the gaps in the order I would take them, and the
traps that cost the most time to find.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

web/src/app.html

@@ -7,7 +7,6 @@
 		<meta name="description" content="verdande — opgaver og projekter, delt." />
 		<link rel="manifest" href="/manifest.webmanifest" />
 		<link rel="icon" href="/icon.svg" type="image/svg+xml" />
-		<link rel="apple-touch-icon" href="/icon-180.png" />
 		<title>verdande</title>
 		<script>
 			// Applied before first paint, so a dark-theme user never sees a white