feat(workspace-terminal): use environment shell command

ts_web/elements/00group-runtime/environments/WebContainerEnvironment.ts

@@ -1,5 +1,11 @@
 import * as webcontainer from '@tempfix/webcontainer__api';
-import type { IExecutionEnvironment, IFileEntry, IFileWatcher, IProcessHandle } from '../interfaces/IExecutionEnvironment.js';
+import type {
+  IExecutionEnvironment,
+  IFileEntry,
+  IFileWatcher,
+  IProcessHandle,
+  IShellCommand,
+} from '../interfaces/IExecutionEnvironment.js';
 
 /**
  * WebContainer-based execution environment.
@@ -154,6 +160,14 @@ export class WebContainerEnvironment implements IExecutionEnvironment {
     };
   }
 
+  public getShellCommand(): IShellCommand {
+    return {
+      command: 'jsh',
+      label: 'jsh',
+      prompt: '~/',
+    };
+  }
+
   // ============ WebContainer-specific methods ============
 
   /**

ts_web/elements/00group-runtime/interfaces/IExecutionEnvironment.ts

@@ -29,6 +29,17 @@ export interface IProcessHandle {
   kill(): void;
 }
 
+export interface IShellCommand {
+  /** Executable to start for an interactive shell session. */
+  command: string;
+  /** Optional command arguments. */
+  args?: string[];
+  /** Optional display label for terminal tabs. */
+  label?: string;
+  /** Optional prompt marker used for setup commands. */
+  prompt?: string;
+}
+
 /**
  * Abstract execution environment interface.
  * Implementations can target WebContainer (browser), Backend API (server), or Mock (testing).
@@ -93,12 +104,18 @@ export interface IExecutionEnvironment {
 
   /**
    * Spawn a new process
-   * @param command - Command to run (e.g., 'jsh', 'node', 'npm')
+   * @param command - Command to run (e.g., 'node', 'npm')
    * @param args - Optional arguments
    * @returns Process handle with I/O streams
    */
   spawn(command: string, args?: string[]): Promise<IProcessHandle>;
 
+  /**
+   * Return the environment-native interactive shell command.
+   * Implementations should provide this when terminal shells need a specific executable.
+   */
+  getShellCommand?(): IShellCommand | Promise<IShellCommand>;
+
   // ============ Lifecycle ============
 
   /**