feat: bridge_self bot commands — status, thresholds, reset, health

Adds bot commands for the bridge_self provider so operators can inspect
and manage bridge health from chat: /status, /thresholds, /reset, /health.
Includes Jinja2 templates for both locales, seed data, capability slots,
and a handler that exposes pending deferred backlog plus per-counter
reset. Also adds .claude/skills/ for project-scoped graph-aware skills.

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

@@ -61,7 +61,7 @@
 		const tiles: MetaTile[] = [];
 		const h = health[provider.id];
 		const provDesc = getDescriptor(provider.type);
-		// Status — first tile, color-coded
+		// Status — first tile, color-coded
 		if (h === true) {
 			tiles.push({ icon: 'mdiCheckCircle', label: t('providers.online'), tone: 'mint' });
 		} else if (h === false) {
@@ -107,10 +107,10 @@
 		try {
 			const u = new URL(url);
 			const segments = u.pathname.split('/').filter(Boolean);
-			const tail = segments.length ? `/${segments[0]}${segments.length > 1 ? '/…' : ''}` : '';
+			const tail = segments.length ? `/${segments[0]}${segments.length > 1 ? '/…' : ''}` : '';
 			return `${u.host}${tail}`;
 		} catch {
-			return url.length > 32 ? `${url.slice(0, 30)}…` : url;
+			return url.length > 32 ? `${url.slice(0, 30)}…` : url;
 		}
 	}
 
@@ -142,7 +142,7 @@
 
 	let health = $state<Record<number, boolean | null>>({});
 
-	// Status pill row for the page header — derived from health probes.
+	// Status pill row for the page header — derived from health probes.
 	const headerPills = $derived.by(() => {
 		const onlineCount = Object.values(health).filter(v => v === true).length;
 		const offlineCount = Object.values(health).filter(v => v === false).length;