Fix lint debt from admin overhaul; make check/lint/test/build green

- Scope @typescript-eslint/no-explicit-any off for *.spec.ts test doubles
- Type enhance() submit callbacks with SubmitFunction in api-keys page
- Drop as-any casts in proclamations upsert by using typed form data
- Fix useless regex escapes in profiles phone validation
- Remove unused locals param from api-keys load
- Use resolve() for admin nav/error links; store literal hrefs in adminModels
- Update README admin section and ADMIN_OVERHAUL lint caveat

src/routes/+error.svelte

@@ -1,5 +1,6 @@
 <script lang="ts">
 	import { page } from '$app/stores';
+	import { resolve } from '$app/paths';
 	import Window from '$lib/components/containers/Window.svelte';
 </script>
 
@@ -7,7 +8,7 @@
 	{#if $page.status === 403}
 		<h1>Not Authorized</h1>
 		<p>
-			You don't have permission to view this page. <a href="/">Go home</a>.
+			You don't have permission to view this page. <a href={resolve('/')}>Go home</a>.
 		</p>
 	{/if}
 </Window>