feat(mana/web/nutriphi): context menu quick-action for "Neue Mahlzeit"

Adds a contextMenuActions entry to the nutriphi registerApp() block
matching the convention todo / calendar / contacts / habits / notes /
dreams / cycles all use: a Plus-icon "Neue Mahlzeit" action that
dispatches a window CustomEvent('mana:quick-action', { app: 'nutriphi',
action: 'new' }).

Note: there is currently no registered listener for mana:quick-action
in the codebase — every existing module dispatches it but nothing
consumes it yet (presumably waiting for a central handler in the
workbench shell). Adding the entry now keeps nutriphi consistent with
the convention so it will light up automatically once the listener
lands.

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

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

@@ -541,6 +541,17 @@ registerApp({
 	views: {
 		list: { load: () => import('$lib/modules/nutriphi/ListView.svelte') },
 	},
+	contextMenuActions: [
+		{
+			id: 'new-meal',
+			label: 'Neue Mahlzeit',
+			icon: Plus,
+			action: () =>
+				window.dispatchEvent(
+					new CustomEvent('mana:quick-action', { detail: { app: 'nutriphi', action: 'new' } })
+				),
+		},
+	],
 });
 
 registerApp({