fix(acp): include shell command in permission request

[bcdady]

Issue

Closes #4240 (partial — the writeTextFile gap is addressed separately in dev)

Type of change

• Bug fix

What does this PR do?

When opencode asks for permission to run a shell command in ACP mode (e.g. inside Zed), the permission prompt showed only bash or nothing at all — giving no indication of what command would actually be executed.

Two fields were missing:

1. tool/shell.ts: ask() always passed metadata: {} — the command string was never included in the permission request
2. acp/agent.ts: requestPermission used the tool name (bash) as the title regardless; it now prefers metadata.command when present

With this fix, the Zed permission prompt shows the actual command (e.g. git status) as the title, and includes it in rawInput for the expanded detail view.

How did you verify your code works?

Tested locally in Zed with opencode-pr28734 custom agent. Permission prompts for bash commands now display the command string instead of just bash.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

Based on my search, I found a related PR:

Related PR:

• PR fix: add support for ACP writeTextFile clientCapability #22674: fix: add support for ACP writeTextFile clientCapability
  • fix: add support for ACP writeTextFile clientCapability #22674

Why it's related: According to your PR description, PR #22674 is the original submission of this exact fix. You mention: "This is a re-submission of the same fix from PR #22674, which addressed the same issue but went stale. The diff is functionally identical; it has been rebased onto the current dev HEAD."

Since PR #22674 went stale and you're resubmitting the rebased fix as PR #28734, ensure PR #22674 is closed/marked as superseded before merging this one.

[github-actions]

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[github-actions]

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