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-tauri/Cargo.toml

@@ -4,7 +4,7 @@ version = "2.1.1"
 description = "OpsXShell native remote operations runtime"
 authors = ["OpsXShell Team"]
 edition = "2021"
-rust-version = "1.77"
+rust-version = "1.89"
 
 [lib]
 name = "opsxshell_lib"
@@ -17,6 +17,7 @@ tauri-build = { version = "2.4", features = [] }
 anyhow = "1.0"
 aes-gcm = "0.10"
 base64 = "0.22"
+image = { version = "0.25", default-features = false, features = ["jpeg"] }
 dirs = "6.0"
 open = "5.3"
 rfd = "0.15"
@@ -34,12 +35,20 @@ tauri = { version = "2.8", features = [] }
 tauri-plugin-deep-link = "2"
 tauri-plugin-single-instance = "2"
 thiserror = "2.0"
-tokio = { version = "1.43", features = ["rt-multi-thread", "sync", "time"] }
+tokio = { version = "1.43", features = ["rt-multi-thread", "sync", "time", "net", "macros"] }
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 uuid = { version = "1.11", features = ["v4"] }
 arboard = { version = "3.6.1", default-features = false }
 url = "2.5"
+# Remote desktop protocol engines (IronRDP / RFB)
+ironrdp = { version = "0.17", default-features = false, features = ["connector", "session", "graphics", "input", "pdu", "core", "svc", "cliprdr", "rdpdr", "rdpsnd"] }
+ironrdp-blocking = "0.10"
+sspi = { version = "0.21", features = ["network_client"] }
+rustls = { version = "0.23", default-features = false, features = ["std", "tls12", "aws-lc-rs"] }
+tokio-rustls = "0.26"
+x509-cert = { version = "0.2", default-features = false, features = ["std"] }
+vnc-rs = "0.5"
 
 [profile.release]
 codegen-units = 1