fix(web): preserve managed config and status compatibility (#2389)

Fix web/frontend compat bugs in managed config & runtime status

- Preserve [[peer]].peer_public_key when TOML configs round-trip
  through the web/managed NetworkConfig path
- Keep old peer_urls clients working while adding structured peer
  metadata for new clients
- Make frontend protobuf JSON normalization preserve omitted-field
  semantics instead of turning missing data into misleading defaults
- Harden runtime status rendering against omitted or string-encoded
  backend fields
- Expose peer-route feature flags in the web status UI

easytier-web/frontend-lib/src/locales/cn.yaml

@@ -341,6 +341,8 @@ web:
     import_config: 导入配置
     create_new: 创建新网络
     network_status: 网络状态
+    loading_network_status: 正在加载网络状态
+    network_info_unavailable: 网络状态不可用
     network_configuration: 网络配置
     loading_network_configuration: 加载网络配置
     no_network_selected: 未选择网络

easytier-web/frontend-lib/src/locales/en.yaml

@@ -341,6 +341,8 @@ web:
     import_config: Import Config
     create_new: Create New Network
     network_status: Network Status
+    loading_network_status: Loading Network Status
+    network_info_unavailable: Network status is unavailable
     network_configuration: Network Configuration
     loading_network_configuration: Loading Network Configuration
     no_network_selected: No Network Selected