fix(pve): Fix connection issues and add more error handlings (#1081)

* feat(PVE): Added display of PVE connection loading steps

Added a detailed display of loading steps during the PVE connection process, including stages such as establishing an SSH tunnel, authentication, and data retrieval

Also optimized the sorting of PVE storage content and the logic for handling connection errors

* feat(pve): Added error handling and prompts for PVE two-factor authentication

Added error handling for PVE servers when two-factor authentication is enabled, along with relevant error types and localized prompts

* feat(PVE): Added support for PVE passwords during key-based authentication

- Added the `pvePwd` field to the `ServerCustom` model
- Added a PVE password input field to the edit page (displayed only during key-based authentication)
- Updated multilingual files to support PVE-related loading states and password prompts
- Optimized PVE connection logic to support password verification during key-based authentication

lib/generated/l10n/l10n_zh.dart

@@ -506,9 +506,30 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get pveLoginFailed => '登录失败。无法使用服务器配置中的用户名或密码通过 Linux PAM 方式认证。';
 
+  @override
+  String get pveOtpRequired => '此 PVE 服务器已启用双因素认证，请输入 OTP 验证码。';
+
   @override
   String get pveVersionLow => '当前该功能处于测试阶段，仅在 PVE 8+ 上测试过，请谨慎使用';
 
+  @override
+  String get pveLoadingForwarding => '正在建立 SSH 隧道...';
+
+  @override
+  String get pveLoadingLogin => '正在认证 PVE...';
+
+  @override
+  String get pveLoadingData => '正在获取集群数据...';
+
+  @override
+  String get pveLoadingConnect => '正在连接...';
+
+  @override
+  String get pvePassword => 'PVE 密码';
+
+  @override
+  String get pvePasswordHint => '使用密钥认证时需要填写';
+
   @override
   String get read => '读';
 
@@ -1315,9 +1336,30 @@ class AppLocalizationsZhTw extends AppLocalizationsZh {
   @override
   String get pveLoginFailed => '登入失敗。無法使用伺服器設定中的使用者名稱或密碼透過 Linux PAM 方式認證。';
 
+  @override
+  String get pveOtpRequired => '此 PVE 伺服器已啟用雙因素認證，請輸入 OTP 驗證碼。';
+
   @override
   String get pveVersionLow => '此功能目前處於測試階段，僅在 PVE 8+ 上進行過測試。請謹慎使用。';
 
+  @override
+  String get pveLoadingForwarding => '正在建立 SSH 隧道...';
+
+  @override
+  String get pveLoadingLogin => '正在認證 PVE...';
+
+  @override
+  String get pveLoadingData => '正在獲取集群數據...';
+
+  @override
+  String get pveLoadingConnect => '正在連接...';
+
+  @override
+  String get pvePassword => 'PVE 密碼';
+
+  @override
+  String get pvePasswordHint => '使用密鑰認證時需要填寫';
+
   @override
   String get read => '讀取';