feat(mesh): server name in adverts + clear-all button + CI fix

- Mesh adverts now use the node's configured server name (e.g. "ThinkPad",
  "Arch Dev") instead of DID key fragments ("Archy-z6MkmkSB")
- Added mesh.clear-all RPC to reset peers, messages, contacts, and history
- Added "Clear All" button in Mesh UI peers panel
- Both glibc and musl builds verified

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

core/archipelago/src/api/rpc/dispatcher.rs

@@ -319,6 +319,7 @@ impl RpcHandler {
             "mesh.send-channel-invite" => self.handle_mesh_send_channel_invite(params).await,
             "conversations.list" => self.handle_conversations_list(params).await,
             "conversations.messages" => self.handle_conversations_messages(params).await,
+            "mesh.clear-all" => self.handle_mesh_clear_all().await,
             "mesh.outbox" => self.handle_mesh_outbox(params).await,
             "mesh.session-status" => self.handle_mesh_session_status(params).await,
             "mesh.rotate-prekeys" => self.handle_mesh_rotate_prekeys().await,

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

@@ -215,4 +215,39 @@ impl RpcHandler {
             }))
         }
     }
+
+    /// mesh.clear-all — Clear all peers, messages, contacts, and presence data.
+    /// Resets the mesh state to a fresh start while keeping the device connected.
+    pub(in crate::api::rpc) async fn handle_mesh_clear_all(&self) -> Result<serde_json::Value> {
+        let service = self.mesh_service.read().await;
+        if let Some(svc) = service.as_ref() {
+            let state = svc.state();
+            // Clear peers (except synthetic federation peers)
+            state.peers.write().await.clear();
+            // Clear all messages
+            state.messages.write().await.clear();
+            // Clear contacts
+            state.contacts.write().await.clear();
+            // Clear presence
+            state.presence.write().await.clear();
+            // Clear chunk buffer
+            state.chunk_buffer.write().await.clear();
+            // Re-seed federation peers
+            let data_dir = self.config.data_dir.clone();
+            crate::mesh::seed_federation_peers_into_mesh(state, &data_dir).await;
+            // Delete persisted messages file
+            let msg_file = data_dir.join("messages.json");
+            let _ = tokio::fs::remove_file(&msg_file).await;
+            // Delete persisted contacts file
+            let contacts_file = data_dir.join("mesh-contacts.json");
+            let _ = tokio::fs::remove_file(&contacts_file).await;
+            // Trigger a contact refresh from the radio device
+            let _ = state.send_cmd(
+                crate::mesh::listener::MeshCommand::RefreshContacts,
+            ).await;
+            Ok(serde_json::json!({ "status": "cleared" }))
+        } else {
+            Ok(serde_json::json!({ "status": "no_service" }))
+        }
+    }
 }