dashboard: show LAN status in Local Services panel header

- Add lan_enabled to ServerCtx
- Add lan field to /stats API (enabled, peer count)
- Dashboard shows "LAN off" (dim) or "LAN on · N peers" (green)
- Tooltip shows enable command or mDNS service type

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

site/dashboard.html

@@ -580,10 +580,11 @@ body {
       <!-- Local services -->
       <div class="panel">
         <div class="panel-header">
-          <div>
+          <div style="flex:1;">
             <span class="panel-title">Local Services</span>
             <div style="font-size:0.68rem;color:var(--text-dim);margin-top:0.15rem;">Give localhost apps clean .numa URLs. Persistent, with HTTP proxy.</div>
           </div>
+          <span id="lanToggle" style="font-family:var(--font-mono);font-size:0.68rem;cursor:default;user-select:none;" title=""></span>
         </div>
         <div class="panel-body">
           <form class="override-form" id="serviceForm" onsubmit="return addService(event)">
@@ -874,6 +875,22 @@ async function refresh() {
     document.getElementById('uptime').textContent = formatUptime(stats.uptime_secs);
     document.getElementById('uptimeSub').textContent = formatUptimeSub(stats.uptime_secs);
     document.getElementById('footerUpstream').textContent = stats.upstream || '';
+
+    // LAN status indicator
+    const lanEl = document.getElementById('lanToggle');
+    if (stats.lan) {
+      if (!stats.lan.enabled) {
+        lanEl.style.color = 'var(--text-dim)';
+        lanEl.textContent = 'LAN off';
+        lanEl.title = 'Enable with: numa lan on';
+      } else {
+        const pc = stats.lan.peers || 0;
+        lanEl.style.color = pc > 0 ? 'var(--emerald)' : 'var(--teal)';
+        lanEl.textContent = `LAN on · ${pc} peer${pc !== 1 ? 's' : ''}`;
+        lanEl.title = 'mDNS discovery active (_numa._tcp.local)';
+      }
+    }
+
     document.getElementById('overrideCount').textContent = stats.overrides.active;
     document.getElementById('blockedCount').textContent = formatNumber(q.blocked);
     const bl = stats.blocking;

src/api.rs

@@ -134,6 +134,13 @@ struct StatsResponse {
     cache: CacheStats,
     overrides: OverrideStats,
     blocking: BlockingStatsResponse,
+    lan: LanStatsResponse,
+}
+
+#[derive(Serialize)]
+struct LanStatsResponse {
+    enabled: bool,
+    peers: usize,
 }
 
 #[derive(Serialize)]
@@ -466,6 +473,10 @@ async fn stats(State(ctx): State<Arc<ServerCtx>>) -> Json<StatsResponse> {
             domains_loaded: bl_stats.domains_loaded,
             allowlist_size: bl_stats.allowlist_size,
         },
+        lan: LanStatsResponse {
+            enabled: ctx.lan_enabled,
+            peers: ctx.lan_peers.lock().unwrap().list().len(),
+        },
     })
 }
 

src/ctx.rs

@@ -39,6 +39,7 @@ pub struct ServerCtx {
     pub timeout: Duration,
     pub proxy_tld: String,
     pub proxy_tld_suffix: String, // pre-computed ".{tld}" to avoid per-query allocation
+    pub lan_enabled: bool,
 }
 
 pub async fn handle_query(

src/main.rs

@@ -159,6 +159,7 @@ async fn main() -> numa::Result<()> {
             format!(".{}", config.proxy.tld)
         },
         proxy_tld: config.proxy.tld.clone(),
+        lan_enabled: config.lan.enabled,
     });
 
     let zone_count: usize = ctx.zone_map.values().map(|m| m.len()).sum();