Merge main into archy-hwconfig — reconcile probe/dedup/name work

Both sides independently fixed the serial-alias dedup and the ESP32
boot-reset races; kept the branch's defer-to-auto-detect for unpinned
preferred paths (single probe pass per cycle) on top of main's
advert-name threading, Reticulum name propagation and radio-first
routing. Modal keeps main's 'Set Recommended' naming + probe progress
bar alongside the branch's in-app firmware flasher step.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

core/archipelago/src/api/rpc/mesh/messaging.rs

@@ -1,6 +1,7 @@
 use super::super::RpcHandler;
 use crate::mesh;
 use anyhow::Result;
+use std::sync::Arc;
 use tracing::info;
 
 impl RpcHandler {
@@ -131,7 +132,14 @@ impl RpcHandler {
             config.broadcast_identity = broadcast;
         }
         if let Some(name) = params.get("advert_name").and_then(|v| v.as_str()) {
-            config.advert_name = Some(name.to_string());
+            // Empty clears the custom mesh name (falls back to the server
+            // name) — without this, a name could be set but never unset.
+            let trimmed = name.trim();
+            config.advert_name = if trimmed.is_empty() {
+                None
+            } else {
+                Some(trimmed.to_string())
+            };
         }
         if let Some(announce) = params
             .get("announce_block_headers")
@@ -202,10 +210,24 @@ impl RpcHandler {
 
         mesh::save_config(&self.config.data_dir, &config).await?;
 
-        // If we have a running service, update its config
-        let mut service = self.mesh_service.write().await;
-        if let Some(svc) = service.as_mut() {
-            svc.configure(config.clone()).await?;
+        // Apply to the running service in the background: configure() may
+        // stop+start the listener (config changes now restart the session so
+        // they actually take effect), and that can take seconds when the old
+        // session is mid-probe. Holding the service write-lock for that long
+        // inside this handler stalled every concurrent mesh.status/mesh.peers
+        // poll behind it — the UI froze and nginx surfaced 502s. The config is
+        // already persisted above; the UI observes progress via mesh.status.
+        {
+            let service_arc = Arc::clone(&self.mesh_service);
+            let config_for_apply = config.clone();
+            tokio::spawn(async move {
+                let mut service = service_arc.write().await;
+                if let Some(svc) = service.as_mut() {
+                    if let Err(e) = svc.configure(config_for_apply).await {
+                        tracing::error!("Applying mesh config to running service failed: {e:#}");
+                    }
+                }
+            });
         }
 
         info!("Mesh config updated");

core/archipelago/src/api/rpc/mesh/status.rs

@@ -134,6 +134,28 @@ impl RpcHandler {
         Ok(serde_json::to_value(probe)?)
     }
 
+    /// mesh.refresh — Actively refresh discovery state: re-query the radio's
+    /// contact table and re-announce ourselves so quiet-but-alive neighbours
+    /// answer. This is what the UI's Refresh button calls — before it existed
+    /// the button only re-read server caches and never touched the radio.
+    pub(in crate::api::rpc) async fn handle_mesh_refresh(&self) -> Result<serde_json::Value> {
+        let service = self.mesh_service.read().await;
+        let Some(svc) = service.as_ref() else {
+            return Ok(serde_json::json!({ "refreshed": false, "device_connected": false }));
+        };
+        let status = svc.status().await;
+        if status.device_connected {
+            let state = svc.shared_state();
+            let _ = state
+                .send_cmd(crate::mesh::listener::MeshCommand::RefreshContacts)
+                .await;
+        }
+        Ok(serde_json::json!({
+            "refreshed": status.device_connected,
+            "device_connected": status.device_connected,
+        }))
+    }
+
     /// mesh.peers — List discovered mesh peers.
     pub(in crate::api::rpc) async fn handle_mesh_peers(&self) -> Result<serde_json::Value> {
         let service = self.mesh_service.read().await;

core/archipelago/src/api/rpc/mesh/typed_messages.rs

@@ -820,6 +820,8 @@ impl RpcHandler {
             crate::fips::dial::PeerRequest::new(fips_npub.as_deref(), &onion_bare, &path)
                 .service(crate::settings::transport::PeerService::MeshFileSharing)
                 .timeout(std::time::Duration::from_secs(120))
+                .fips_timeout(std::time::Duration::from_secs(8))
+                .record_transport(&self.config.data_dir)
                 .send_get()
                 .await
                 .map_err(|e| anyhow::anyhow!("Fetch failed: {}", e))?;