fix & opt

fix: android in-app upgrade
fmt: proj struct
opt: fetch primaryColor

lib/core/utils/server.dart

@@ -0,0 +1,32 @@
+import 'dart:async';
+
+import 'package:dartssh2/dartssh2.dart';
+import 'package:flutter/foundation.dart';
+
+import '../../data/model/server/server_private_info.dart';
+import '../../data/store/private_key.dart';
+import '../../locator.dart';
+
+/// Must put this func out of any Class.
+/// Because of this function is called by [compute] in [ServerProvider.genClient].
+/// https://stackoverflow.com/questions/51998995/invalid-arguments-illegal-argument-in-isolate-message-object-is-a-closure
+List<SSHKeyPair> loadIndentity(String key) {
+  return SSHKeyPair.fromPem(key);
+}
+
+Future<SSHClient> genClient(ServerPrivateInfo spi) async {
+  final socket = await SSHSocket.connect(spi.ip, spi.port);
+  if (spi.pubKeyId == null) {
+    return SSHClient(
+      socket,
+      username: spi.user,
+      onPasswordRequest: () => spi.pwd,
+    );
+  }
+  final key = locator<PrivateKeyStore>().get(spi.pubKeyId!);
+  return SSHClient(
+    socket,
+    username: spi.user,
+    identities: await compute(loadIndentity, key.privateKey),
+  );
+}