fix(mesh): nuclear clear-all wipes state files + shared secrets

Clear All now deletes messages.json, mesh-contacts.json, sessions.json,
mesh-outbox.json and clears shared secrets for a truly clean slate.

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

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

@@ -216,38 +216,36 @@ 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.
+    /// mesh.clear-all — Nuclear reset: wipe all mesh state files and restart
+    /// the service for a completely clean slate.
     pub(in crate::api::rpc) async fn handle_mesh_clear_all(&self) -> Result<serde_json::Value> {
+        let data_dir = self.config.data_dir.clone();
+        // Delete all mesh state files
+        for filename in &[
+            "messages.json",
+            "mesh-contacts.json",
+            "sessions.json",
+            "mesh-outbox.json",
+        ] {
+            let _ = tokio::fs::remove_file(data_dir.join(filename)).await;
+        }
+        // Clear in-memory state
         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();
+            state.shared_secrets.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" }))
         }
+        Ok(serde_json::json!({ "status": "cleared" }))
     }
 }