Extend HostProtocol union and host models with ET fields

Add 'et' to HostProtocol union type. Add etEnabled, etPort, and
etTerminalPath fields to Host and GroupConfig interfaces. Update
vaultImport type guards to exclude 'et' from importable protocols.
Register ET fields in groupConfig inheritable keys.

domain/groupConfig.ts

@@ -89,6 +89,7 @@ const INHERITABLE_KEYS: (keyof GroupConfig)[] = [
   'port', 'protocol', 'agentForwarding', 'proxyProfileId', 'proxyConfig', 'hostChain', 'startupCommand',
   'legacyAlgorithms', 'skipEcdsaHostKey', 'algorithms',
   'environmentVariables', 'charset', 'moshEnabled', 'moshServerPath',
+  'etEnabled', 'etPort',
   'telnetEnabled', 'telnetPort', 'telnetUsername', 'telnetPassword',
   'theme', 'themeOverride', 'fontFamily', 'fontFamilyOverride', 'fontSize', 'fontSizeOverride', 'fontWeight', 'fontWeightOverride',
   'backspaceBehavior',

domain/models/connection.ts

@@ -46,7 +46,7 @@ export interface EnvVar {
 }
 
 // Protocol type for connections
-export type HostProtocol = 'ssh' | 'telnet' | 'mosh' | 'local' | 'serial';
+export type HostProtocol = 'ssh' | 'telnet' | 'mosh' | 'et' | 'local' | 'serial';
 
 // Serial port configuration
 export type SerialParity = 'none' | 'even' | 'odd' | 'mark' | 'space';
@@ -70,6 +70,8 @@ interface ProtocolConfig {
   enabled: boolean;
   // Mosh-specific
   moshServerPath?: string;
+  // EternalTerminal-specific
+  etPort?: number;
   // Protocol-specific theme override
   theme?: string;
 }
@@ -114,6 +116,8 @@ export interface Host {
   charset?: string;
   moshEnabled?: boolean;
   moshServerPath?: string; // Custom mosh-server path (e.g., /usr/local/bin/mosh-server)
+  etEnabled?: boolean;
+  etPort?: number; // EternalTerminal server port (default: 2022)
   theme?: string;
   themeOverride?: boolean; // Explicitly override the global terminal theme for this host
   fontFamily?: string; // Terminal font family for this host
@@ -261,6 +265,8 @@ export interface GroupConfig {
   charset?: string;
   moshEnabled?: boolean;
   moshServerPath?: string;
+  etEnabled?: boolean;
+  etPort?: number;
   telnetEnabled?: boolean;
   telnetPort?: number;
   telnetUsername?: string;

domain/models/history.ts

@@ -29,7 +29,7 @@ export interface ConnectionLog {
   hostLabel: string; // Display label (e.g., 'Local Terminal' or host label)
   hostname: string; // Target hostname or 'localhost'
   username: string; // SSH username or system username
-  protocol: 'ssh' | 'telnet' | 'local' | 'mosh' | 'serial';
+  protocol: 'ssh' | 'telnet' | 'local' | 'mosh' | 'et' | 'serial';
   startTime: number; // Connection start timestamp
   endTime?: number; // Connection end timestamp (undefined if still active)
   localUsername: string; // System username of the local user

domain/models/terminal.ts

@@ -327,6 +327,7 @@ export interface TerminalSession {
   protocol?: 'ssh' | 'telnet' | 'local' | 'serial';
   port?: number;
   moshEnabled?: boolean;
+  etEnabled?: boolean;
   shellType?: 'posix' | 'fish' | 'powershell' | 'cmd' | 'unknown';
   charset?: string; // Connection-time charset override (e.g. for quick-connect serial)
   // Serial-specific connection settings

domain/vaultImport.ts

@@ -119,7 +119,7 @@ const normalizeGroupPath = (raw: string | undefined): string | undefined => {
 
 const normalizeProtocol = (
   raw: string | undefined,
-): Exclude<HostProtocol, "mosh"> | undefined => {
+): Exclude<HostProtocol, "mosh" | "et"> | undefined => {
   const s = raw?.trim().toLowerCase();
   if (!s) return undefined;
   if (s === "ssh" || s === "ssh2" || s === "ssh-2") return "ssh";
@@ -154,7 +154,7 @@ const createHost = (input: {
   username?: string;
   password?: string;
   port?: number;
-  protocol?: Exclude<HostProtocol, "mosh">;
+  protocol?: Exclude<HostProtocol, "mosh" | "et">;
   group?: string;
   tags?: string[];
   notes?: string;
@@ -210,7 +210,7 @@ const looksLikeHostnameToken = (token: string): boolean => {
 
 const parseTarget = (
   raw: string,
-): { hostname: string; username?: string; port?: number; protocol?: Exclude<HostProtocol, "mosh"> } | null => {
+): { hostname: string; username?: string; port?: number; protocol?: Exclude<HostProtocol, "mosh" | "et"> } | null => {
   const trimmed = raw.trim();
   if (!trimmed) return null;
 
@@ -380,7 +380,7 @@ const importFromPuttyReg = (text: string): VaultImportResult => {
     hostname?: string;
     username?: string;
     port?: number;
-    protocol?: Exclude<HostProtocol, "mosh">;
+    protocol?: Exclude<HostProtocol, "mosh" | "et">;
   };
 
   const sessions: Session[] = [];
@@ -698,7 +698,7 @@ const importFromSecureCrt = (text: string, fileName?: string): VaultImportResult
     hostname?: string;
     username?: string;
     port?: number;
-    protocol?: Exclude<HostProtocol, "mosh">;
+    protocol?: Exclude<HostProtocol, "mosh" | "et">;
   };
 
   const sessions: Session[] = [];
@@ -832,7 +832,7 @@ const importFromMobaXterm = (text: string): VaultImportResult => {
     const group =
       keyParts.length > 1 ? keyParts.slice(0, -1).join("/") : undefined;
 
-    let protocol: Exclude<HostProtocol, "mosh"> | undefined;
+    let protocol: Exclude<HostProtocol, "mosh" | "et"> | undefined;
     let hostname: string | undefined;
     let username: string | undefined;
     let port: number | undefined;