feat: deferred dispatch, release-check provider, settings polish

- Defer quiet-hours dispatches into new deferred_dispatch table; drain
  job + periodic catch-up scan re-fire at window end with coalescing on
  (link, event_type, collection_id).
- Add ON DELETE SET NULL migration on event_log_id and partial unique
  index on (link_id, collection_id, event_type) WHERE status='pending'.
- Add release-check provider abstraction (Gitea/GitHub) with SSRF-safe
  URL validation, settings UI cassette, and scheduled polling.
- Replace importlib-only version lookup with version.py helper that
  prefers the higher of installed metadata vs source pyproject so stale
  editable dev installs stop misreporting.
- Aurora frontend polish: MetaStrip component, ReleaseCassette,
  EventDetailModal expansion, and i18n additions.

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

@@ -15,6 +15,7 @@
 	import EmptyState from '$lib/components/EmptyState.svelte';
 	import ConfirmModal from '$lib/components/ConfirmModal.svelte';
 	import IconButton from '$lib/components/IconButton.svelte';
+	import MetaStrip, { type MetaTile } from '$lib/components/MetaStrip.svelte';
 	import { chatActionItems } from '$lib/grid-items';
 	import { snackSuccess, snackError } from '$lib/stores/snackbar.svelte';
 	import { highlightFromUrl } from '$lib/highlight';
@@ -94,6 +95,53 @@
 		label: tt.charAt(0).toUpperCase() + tt.slice(1),
 	})));
 
+	function targetTiles(target: NotificationTarget): MetaTile[] {
+		const tiles: MetaTile[] = [];
+		// Type tile — useful when the "all types" filter is active and rows
+		// from multiple types appear side-by-side. The receivers count is
+		// already shown inside the `target-summary` button, so we don't repeat
+		// it as a tile.
+		tiles.push({
+			icon: TYPE_ICONS[target.type] || 'mdiTarget',
+			label: target.type,
+			tone: 'lavender',
+			mono: true,
+		});
+		const botName = getBotName(target);
+		if (botName) {
+			tiles.push({
+				icon: 'mdiRobot',
+				label: botName,
+				tone: 'sky',
+			});
+		}
+		// Telegram targets expose a chat label in config — surface it so the
+		// row reads "Telegram · @bot · Family chat" without expanding.
+		const cfg = (target.config || {}) as Record<string, any>;
+		if (target.type === 'telegram' && cfg.chat_id) {
+			tiles.push({
+				icon: 'mdiChat',
+				label: String(cfg.chat_id),
+				tone: 'orchid',
+				mono: true,
+			});
+		}
+		// Webhook target — show host
+		if (target.type === 'webhook' && cfg.url) {
+			let host = String(cfg.url);
+			try { host = new URL(host).host; } catch { /* keep raw */ }
+			tiles.push({
+				icon: 'mdiLinkVariant',
+				label: host,
+				hint: String(cfg.url),
+				href: String(cfg.url),
+				tone: 'orchid',
+				mono: true,
+			});
+		}
+		return tiles;
+	}
+
 	// ── Derived state ──
 
 	let allTargets = $derived(targetsCache.items);
@@ -660,7 +708,7 @@
 						{@const childLabel = target.type === 'broadcast' ? t('targets.childTargets') : t('targets.receivers')}
 						<Card hover entityId={target.id}>
 							<!-- Target header (clickable to toggle receiver visibility) -->
-							<div class="flex items-center justify-between gap-2">
+							<div class="flex items-center gap-2">
 								<button
 									type="button"
 									class="target-summary"
@@ -682,6 +730,7 @@
 										<span class="target-summary__count target-summary__count--empty">{t('targets.noReceivers')}</span>
 									{/if}
 								</button>
+								<MetaStrip tiles={targetTiles(target)} />
 								<div class="flex items-center gap-1 shrink-0">
 									<IconButton icon="mdiPencil" title={t('common.edit')} onclick={() => edit(target)} />
 									<IconButton icon="mdiSend" title={t('targets.test')} onclick={() => test(target.id)} />
@@ -765,7 +814,7 @@
 	}
 
 	.target-summary {
-		flex: 1;
+		flex: 1 1 auto;
 		min-width: 0;
 		display: flex;
 		align-items: center;
@@ -780,6 +829,12 @@
 		border-radius: 8px;
 		transition: background 0.15s ease;
 	}
+	@media (min-width: 1024px) {
+		.target-summary {
+			flex: 0 1 auto;
+			max-width: 32rem;
+		}
+	}
 	.target-summary:hover {
 		background: var(--color-glass-strong);
 	}