fix: pass bash -c "..." commands directly to Docker and display with correct quoting (issue #91)

[konard]

Fixes #91

Root Cause

Bug 1 — Quote stripping / wrong script argument: `args-parser.js` calls `commandArgs.join(' ')` to build a command string. When the user ran `--isolated docker --image konard/sandbox -- bash -i -c "nvm --version"`, the shell stripped quotes so `process.argv` contained `['bash', '-i', '-c', 'nvm --version']`. But `join(' ')` produced `bash -i -c nvm --version` — a flat string where the boundary between `nvm` and `--version` is lost.

Bug 2 — Double-wrapping: `isInteractiveShellCommand()` (added for issue #84) returns `false` for any command including `-c`. So the else-branch fired and wrapped it again: `['/bin/bash', '-i', '-c', 'bash -i -c nvm --version']` → Docker ran `/bin/bash -i -c "bash -i -c nvm --version"`.

Bug 3 — Misleading display: Even after the execution was fixed, the command was still displayed as `$ bash -i -c nvm --version` (without quotes), giving the user inaccurate feedback on how their command was interpreted.

Fix (in `js/src/lib/isolation.js`)

Three helpers added:

• `isShellInvocationWithArgs(command)` — detects `bash -c ...` style commands
• `buildShellWithArgsCmdArgs(command)` — reconstructs argv with the script as a single arg (fixes execution, merged in v0.24.6 via PR fix: bash -i -c "nvm --version" interpreted as bash -i -c nvm --version (issue #91) #92)
• `buildDisplayCommand(command)` — quotes `-c` script arguments that contain spaces so the displayed command matches actual execution

The branch logic in `runInDocker()` attached mode:
```js
if (isBareShell) {
// issue #84 fix (bare shell, no -c)
} else if (isShellInvocationWithArgs(command)) {
attachedCmdArgs = buildShellWithArgsCmdArgs(command); // issue #91 fix
} else {
attachedCmdArgs = [...shellCmdArgs, '-c', command]; // non-shell commands unchanged
}
```

The display line now shows:

$ bash -i -c "nvm --version"

instead of the misleading:

$ bash -i -c nvm --version

A full regression test suite is in `js/test/regression-91.test.js` (37 tests, all pass).

[konard]

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[konard]

The issue is not resolved, check my feedback at: #91 (comment)

We need to ensure all changes are correct, consistent, validated, tested, logged and fully meet all discussed requirements (check issue description and all comments in issue and in pull request). Ensure all CI/CD checks pass.

[konard]

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[konard]

Fixed the remaining display issue from your feedback.

What was wrong: Even after the execution fix in v0.24.6, the command was still displayed as:

$ bash -i -c nvm --version

Root cause: createCommandLine(command) receives the flat joined string from args-parser.js and displays it as-is — no quoting is preserved.

Fix: Added buildDisplayCommand(command) in isolation.js. When the command is a shell-with--c invocation, it uses buildShellWithArgsCmdArgs() to split the argv correctly and then re-joins with the script argument quoted if it contains spaces.

Result: The output now correctly shows:

$ bash -i -c "nvm --version"

6 new regression tests added for the display behavior, all 37 tests pass.

[konard]

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[konard]

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[konard]

✅ Ready to merge

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