chore(toast): add APG alert pattern URL to morfo

Closes the cosmetic gap surfaced by the cross-component audit (#83).
Toast renders via role='alert' / live-region; the matching APG pattern
is the "alert" widget.

Avatar audited too — its empty morfo (scope: ['eidos'], no texts/events/
apg) is the canonical shape for purely visual primitives; Icon follows
the same template. No change needed.

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

src/uix/morfo/components/toast.ts

@@ -6,6 +6,7 @@ export const toastMorfo = {
 	name: 'Toast',
 	kebab: 'toast',
 	scope: ['soma', 'sema'],
+	apg: 'https://www.w3.org/WAI/ARIA/apg/patterns/alert/',
 	texts: {
 		label: '#?components.toast.label|Toast'
 	},