fix(agent-manager): persist sandbox default in worktree dialog

[marius-kilocode]

This fixes a merge regression.

The Agent Manager new-worktree modal was deriving its sandbox toggle from the experimental sandbox config instead of the persisted new-session sandbox default. When sandboxing was disabled as the default, reopening the modal still showed sandboxing enabled and newly created Agent Manager sessions could be forced back into sandbox mode.

This changes the modal to load the persisted sandbox default, save modal toggle changes through the same default-setting path used by the prompt input, and correlate sandbox default responses with the modal request. The modal now only sends a create-session sandbox override while a local change is still pending, so new worktree sessions follow the saved preference instead of reverting to the config default.

This fixes unselecting sandboxing in the Agent Manager create modal, closing and reopening the modal, and seeing sandboxing selected again.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 files)

• packages/kilo-vscode/tests/unit/sandbox-bootstrap.test.ts

Previous Review Summary (commit 401e0fd)

Current summary above is authoritative. Previous snapshots are kept for context only.

Previous review (commit 401e0fd)

Status: 2 Issues Found | Recommendation: Address before merge

Overview

Severity	Count
CRITICAL	0
WARNING	1
SUGGESTION	1

Issue Details (click to expand)

WARNING

File	Line	Issue
packages/kilo-vscode/webview-ui/agent-manager/NewWorktreeDialog.tsx	167	The modal ignores sandboxDefaultStatus refreshes without its fixed requestID, so changing the sandbox default in another view can leave the open dialog stale while new worktrees inherit the updated persisted default.

SUGGESTION

File	Line	Issue
packages/kilo-vscode/tests/unit/new-worktree-dialog-sandbox.test.ts	11	The new test is source-text based, so it does not exercise the dialog's request/revision state transitions and would miss regressions in the new sandbox-default flow.

Fix these issues in Kilo Cloud

Files Reviewed (6 files)

• .changeset/agent-manager-sandbox-default.md - 0 issues
• packages/kilo-vscode/src/KiloProvider.ts - 0 issues
• packages/kilo-vscode/src/agent-manager/types.ts - 0 issues
• packages/kilo-vscode/tests/unit/new-worktree-dialog-sandbox.test.ts - 1 issue
• packages/kilo-vscode/webview-ui/agent-manager/NewWorktreeDialog.tsx - 1 issue
• packages/kilo-vscode/webview-ui/src/types/messages/webview-messages.ts - 0 issues

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_{Reviewed by gpt-5.4-20260305 · Input: 49.3K · Output: 7.3K · Cached: 209.7K}

_{Review guidance: REVIEW.md from base branch main}