chore: integrate all Tergent UI + SSH features
- TergentTheme.kt: color tokens, typography, spacing, shapes
- DevicesScreen.kt, DiagnosticsScreen.kt, NotificationsScreen.kt: 3 new pages
- SshTerminalManager.kt: SSH connection manager (JSch)
- SshTerminalScreen.kt: terminal UI with arrow keys/Tab/Ctrl keypad
- SshHost.kt: standalone SSH composable
- SettingsScreens.kt: SSH terminal entry in settings
- ShellScreen.kt: SSH row in settings list
- Removed duplicate app/main/ source directory (single source: app/src/main/)
- JSch 0.1.55 dependency
茂之钳
883ec72ad7