feat(profile): add Benachrichtigungsverlauf cross-link below notification preferences

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/routes/profile/+page.svelte

@@ -100,5 +100,14 @@ const hasEmail = $derived(!!data.user?.email);
 				{m.btn_save()}
 			</button>
 		</form>
+
+		<div class="mt-4 border-t border-line pt-4">
+			<a
+				href="/notifications"
+				class="text-sm font-medium text-ink-2 underline decoration-accent/60 transition-colors hover:text-ink hover:decoration-accent"
+			>
+				{m.notification_history_view_link()}
+			</a>
+		</div>
 	</div>
 </div>