fix(dashboard): F-U-006 surface trigger.enabled with a "• disabled" pill

Trigger.enabled is a boolean on the DTO and the backend supports
disabled triggers, but the trigger list never showed the state.
Operators couldn't tell from the UI whether a trigger was paused.

Add a small "• disabled" pill next to the kind badge when
t.enabled === false, with a tooltip explaining the consequence. No
PATCH endpoint yet for enabled, so toggle UI is tracked separately
as a follow-up.

AUDIT.md anchor: F-U-006.

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

dashboard/src/routes/apps/[slug]/+page.svelte

@@ -1627,6 +1627,11 @@
 						<li class="domain-row">
 							<div>
 								<span class="kind-badge">{t.kind}</span>
+								{#if !t.enabled}
+									<!-- F-U-006: surface the trigger.enabled flag. No PATCH endpoint
+									     yet, so this is read-only; toggle UI tracked for a follow-up. -->
+									<span class="muted small" title="Trigger is disabled — events are not dispatched.">• disabled</span>
+								{/if}
 								{#if t.details.kind === 'cron'}
 									<code>{t.details.schedule}</code>
 									<span class="muted">— {t.details.timezone}</span>