[Fix] Queued messages no longer approve pending actions

[zoomote]

​Created by Roomote. Follow up by mentioning @roomote, in the web UI, or in Discord.

What changed

Queued user input now reaches pending tool, command, MCP, and child-completion prompts as feedback instead of an implicit approval. The existing command_output flow-control exception remains non-draining.

The change includes focused unit coverage for both queue timing windows and a deterministic VS Code e2e that queues input while a child is completing, verifies the child processes it, and only then allows the parent to resume.

Why this change was made

Queued instructions could previously trigger yesButtonClicked, causing commands to run or delegated children to complete before processing the user's new direction. This fixes #1308 and establishes the explicit-approval invariant tracked under #355.

Impact

Users can safely steer a running task with queued input without bypassing approval controls. Explicit approvals and configured auto-approval continue to behave normally when no queued intervention is present.

Related PRs

• Documentation: [Docs] Clarify queued-message approval behavior Zoo-Code-Docs#39

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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