fix(gui/web): 修复丢包率和 NAT 类型显示 (#2643)

easytier-proto/src/api.rs

@@ -540,4 +540,71 @@ mod tests {
 
         assert_eq!(pair.get_loss_rate(), Some(0.0));
     }
+
+    #[cfg(feature = "json-rpc")]
+    #[test]
+    fn peer_route_pair_json_omits_zero_loss_rate_and_preserves_nonzero_loss_rate() {
+        let pair = PeerRoutePair {
+            peer: Some(PeerInfo {
+                conns: vec![
+                    PeerConnInfo {
+                        conn_id: "zero-loss".to_owned(),
+                        loss_rate: 0.0,
+                        ..Default::default()
+                    },
+                    PeerConnInfo {
+                        conn_id: "nonzero-loss".to_owned(),
+                        loss_rate: 0.25,
+                        ..Default::default()
+                    },
+                ],
+                ..Default::default()
+            }),
+            ..Default::default()
+        };
+
+        let json = serde_json::to_value(pair).unwrap();
+        let conns = json["peer"]["conns"].as_array().unwrap();
+        assert!(!conns[0].as_object().unwrap().contains_key("loss_rate"));
+        assert_eq!(conns[1]["loss_rate"], serde_json::json!(0.25));
+    }
+
+    #[cfg(feature = "json-rpc")]
+    #[test]
+    fn peer_route_pair_json_stun_info_uses_enum_names_and_omits_unknown_nat() {
+        use super::instance::Route;
+        use crate::proto::common::{NatType, StunInfo};
+
+        let known = PeerRoutePair {
+            route: Some(Route {
+                stun_info: Some(StunInfo {
+                    udp_nat_type: NatType::FullCone as i32,
+                    tcp_nat_type: NatType::NoPat as i32,
+                    ..Default::default()
+                }),
+                ..Default::default()
+            }),
+            ..Default::default()
+        };
+        let unknown = PeerRoutePair {
+            route: Some(Route {
+                stun_info: Some(StunInfo::default()),
+                ..Default::default()
+            }),
+            ..Default::default()
+        };
+
+        let known_json = serde_json::to_value(known).unwrap();
+        assert_eq!(
+            known_json["route"]["stun_info"]["udp_nat_type"],
+            serde_json::json!("FullCone")
+        );
+        assert_eq!(
+            known_json["route"]["stun_info"]["tcp_nat_type"],
+            serde_json::json!("NoPAT")
+        );
+
+        let unknown_json = serde_json::to_value(unknown).unwrap();
+        assert_eq!(unknown_json["route"]["stun_info"], serde_json::json!({}));
+    }
 }