chore: remove /apps route — not needed

The standalone /apps page (AppsPage from shared-ui) is redundant in the
workbench model — apps are discoverable via the app picker and scene
management directly on the home screen.

- Delete routes/(app)/apps/+page.svelte
- Remove command menu "Alle Apps" entry
- Drop allAppsHref prop from PillNavigation

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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

@@ -746,7 +746,6 @@
 			category: 'Navigation',
 			onExecute: () => goto('/?app=credits'),
 		},
-		{ id: 'apps', label: 'Alle Apps', category: 'Navigation', onExecute: () => goto('/apps') },
 		{
 			id: 'settings',
 			label: 'Einstellungen',
@@ -988,7 +987,6 @@
 					creditsHref="/?app=credits"
 					themesHref="/?app=themes"
 					helpHref="/?app=help"
-					allAppsHref="/apps"
 					{spotlightActions}
 					{contentSearcher}
 					positioning="static"

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

@@ -1,14 +0,0 @@
-<script lang="ts">
-	import { AppsPage } from '@mana/shared-ui';
-</script>
-
-<div class="apps-page-wrapper">
-	<AppsPage currentAppId="mana" locale="de" title="Alle Apps" />
-</div>
-
-<style>
-	.apps-page-wrapper {
-		background-color: hsl(var(--color-background));
-		min-height: 100%;
-	}
-</style>