feat(i18n): add multi-language support (ja/ko/vi/ru/zh-TW) with system auto-detection

- Extend AppLanguage to 7 locales: zh-CN, zh-TW, en, ja, ko, vi, ru
- Auto-detect system language via navigator.languages; fallback to English
- Add BCP47 locale mapping for date formatting and sorting
- Create 50 translation JSON files (5 languages × 10 namespaces, 1137 keys each)
- Update language selector with native language names
- Extend locale key parity test to cover all 7 languages (70 assertions)
- Add VNC/RDP desktop, serial terminal, AI agent, port forwarding, and SFTP features
- Add credential encryption, host metrics, session backup crypto, and zmodem bridge
- Update Rust backend: desktop services, host metrics, SSH/SFTP enhancements

src/stores/tabStore.ts

@@ -3,6 +3,7 @@ import { persist } from 'zustand/middleware'
 import { createLogger } from '../utils/logger'
 import type { SSHConnectionConfig } from '../../shared/types/session.types'
 import type { SerialConfig } from '../../shared/types/serial.types'
+import type { RdpConfig, VncConfig } from '../../shared/types/desktop.types'
 
 const logger = createLogger('TabStore')
 
@@ -10,6 +11,8 @@ export type TabType =
   | 'welcome'
   | 'terminal'
   | 'serial'
+  | 'rdp'
+  | 'vnc'
   | 'sftp'
   | 'portforward'
   | 'settings'
@@ -55,6 +58,10 @@ export interface Tab {
   localShellPath?: string
   /** Native serial terminal configuration. */
   serialConfig?: SerialConfig
+  /** RDP remote desktop configuration (password kept in-memory for the tab lifetime). */
+  rdpConfig?: RdpConfig
+  /** VNC remote desktop configuration. */
+  vncConfig?: VncConfig
   /** Pro upgrade tab context */
   upgradeFeature?: string
   upgradeComingSoon?: boolean
@@ -71,7 +78,10 @@ interface PersistedTab {
   splitLayout?: SplitLayout
   isLocal?: boolean
   serialConfig?: SerialConfig
+  rdpConfig?: RdpConfig
+  vncConfig?: VncConfig
   // 注意：不持久化 connectionConfig（可能包含密码/密钥）
+  // 注意：rdpConfig / vncConfig 含密码，持久化时剥离
   // 注意：不持久化 connectionInstance（运行时状态）
   // 注意：不持久化 connectionStatus（运行时状态）
   // 注意：不持久化 isActive（由 activeTabId 决定）