chore: drop who + kontext MANA_APPS entries to match earlier extractions

Two cleanup follow-ups that the parallel sessions which extracted these
modules left behind, surfaced by the route-drift test added in 6d193a9fa:

who — `chore: extract who module into standalone repo` (a3eedfc87) +
follow-up cleanup (f076d9345) removed `lib/modules/who/` and the
workbench `registerApp({ id: 'who' })` block, but the broken `/who/+page`
and `/who/play/[gameId]/+page` routes still imported the deleted module
and the MANA_APPS entry, APP_ICONS icon, categories.ts mapping and
help-content block were still in place. Drop all five.

kontext — `feat(notes): isSpaceContext flag replaces kontext module
(Option B)` (8fbdc6db7) replaced the kontext module with a per-note
`isSpaceContext` flag in the notes module. The MANA_APPS entry I added
in 6d193a9fa and the matching APP_ICONS entry are now both stale —
there is no `kontext` route, no module, no registerApp. Drop them.

Verification: `registry.spec.ts` 4/4 green, `svelte-check src/lib`
0 errors / 5 warnings (pre-existing in other files).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/mana/apps/web/src/lib/app-registry/categories.ts

@@ -79,7 +79,6 @@ export const APP_CATEGORY_MAP: Record<string, AppCategory> = {
 	wetter: 'life',
 	inventory: 'life',
 	storage: 'life',
-	who: 'life',
 	firsts: 'life',
 	memoro: 'life',
 	questions: 'life',

apps/mana/apps/web/src/lib/app-registry/help-content.ts

@@ -448,21 +448,6 @@ export const MODULE_HELP: Record<string, ModuleHelp> = {
 			'Bring-Listen-Items können von Gästen "reserviert" werden',
 		],
 	},
-	who: {
-		description:
-			'Rate-Spiel — erkenne Persönlichkeiten anhand von Hinweisen. Die AI gibt dir Schritt für Schritt mehr Informationen.',
-		features: [
-			'AI gibt dir Hinweise, du rätst die Person',
-			'Verschiedene Schwierigkeitsgrade',
-			'Spiel-Verlauf mit Statistiken',
-			'Chat-basierte Interaktion',
-			'Historische und aktuelle Persönlichkeiten',
-		],
-		tips: [
-			'Stelle gezielte Ja/Nein-Fragen um die Person schneller einzugrenzen',
-			'Schwierigere Modi geben weniger offensichtliche Hinweise',
-		],
-	},
 	firsts: {
 		description:
 			'Erste Male festhalten — eine Bucket-List für Dinge die du erleben möchtest, und ein Archiv erlebter Momente.',

apps/mana/apps/web/src/routes/(app)/who/+page.svelte

@@ -1,13 +0,0 @@
-<script lang="ts">
-	import { goto } from '$app/navigation';
-	import ListView from '$lib/modules/who/ListView.svelte';
-	import { RoutePage } from '$lib/components/shell';
-</script>
-
-<svelte:head>
-	<title>Who? — Mana</title>
-</svelte:head>
-
-<RoutePage appId="who">
-	<ListView navigate={(view) => goto(`/who/${view}`)} goBack={() => history.back()} params={{}} />
-</RoutePage>

apps/mana/apps/web/src/routes/(app)/who/play/[gameId]/+page.svelte

@@ -1,18 +0,0 @@
-<script lang="ts">
-	import { goto } from '$app/navigation';
-	import { page } from '$app/stores';
-	import PlayView from '$lib/modules/who/views/PlayView.svelte';
-	import { RoutePage } from '$lib/components/shell';
-
-	const gameId = $derived($page.params.gameId ?? '');
-</script>
-
-<svelte:head>
-	<title>Who? — Spiel — Mana</title>
-</svelte:head>
-
-<RoutePage appId="who" backHref="/who" title="Spiel">
-	{#if gameId}
-		<PlayView {gameId} onBack={() => goto('/who')} />
-	{/if}
-</RoutePage>