Fix: prevent delete default network (apple#1083)

- Fixed apple#1073
- Move the conditional check to the front; there's no need
  to check for a default network after filtering.

Signed-off-by: ChengHao Yang <17496418+tico88612@users.noreply.github.com>

Author: tico88612

Sources/ContainerCommands/Network/NetworkDelete.swift

@@ -54,8 +54,16 @@ extension Application {
             let uniqueNetworkNames = Set<String>(networkNames)
             let networks: [NetworkState]
 
+            if uniqueNetworkNames.contains(ClientNetwork.defaultNetworkName) {
+                throw ContainerizationError(
+                    .invalidArgument,
+                    message: "cannot delete the default network"
+                )
+            }
+
             if all {
                 networks = try await ClientNetwork.list()
+                    .filter { $0.id != ClientNetwork.defaultNetworkName }
             } else {
                 networks = try await ClientNetwork.list()
                     .filter { c in
@@ -78,13 +86,6 @@ extension Application {
                 }
             }
 
-            if uniqueNetworkNames.contains(ClientNetwork.defaultNetworkName) {
-                throw ContainerizationError(
-                    .invalidArgument,
-                    message: "cannot delete the default network"
-                )
-            }
-
             var failed = [String]()
             let logger = log
             try await withThrowingTaskGroup(of: NetworkState?.self) { group in