[Feat] Integrate DCG with command auto-approval and denial UX

[navedmerchant]

Related GitHub Issue

Closes #1058
Completes #1049. Split from #1050.

Description

Completes the feature at the command approval boundary. DCG-approved commands can bypass the legacy allowlist only when command auto-approval and DCG are enabled. DCG-blocked commands are protected and require explicit approval. Disabling DCG preserves existing behavior. Localized reason/rule feedback and a dedicated denied-command chat state are included.

A user can still explicitly approve a DCG-blocked command; denying it does not execute it.

Stack

4 / 4 — base: feat/dcg-setting

The complete stack tip is tree-identical to the original #1050 branch, so no original change was dropped.

Test Procedure

pnpm --dir src exec vitest run core/auto-approval/__tests__/dcg.spec.ts core/tools/__tests__/executeCommandTool.spec.ts
pnpm --dir packages/types exec vitest run src/__tests__/message.test.ts
pnpm --dir webview-ui exec vitest run src/components/chat/__tests__/ChatRow.command-denied.spec.tsx src/components/chat/__tests__/CommandExecution.spec.tsx
pnpm --dir packages/types check-types
pnpm --dir src check-types
pnpm --dir webview-ui check-types
pnpm --dir src bundle
pnpm --dir webview-ui build

Result: 41 extension, 7 type-package, and 40 webview tests passed; type-checks, production builds, lint, pre-push checks, and i18n validation passed.

Checklist

• Safety boundary covered by tests
• DCG-disabled behavior preserved
• Denied UX and localization included
• Type-check/build/lint passing

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[codecov]

Codecov Report

❌ Patch coverage is 86.48649% with 5 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/core/tools/ExecuteCommandTool.ts	83.33%	2 Missing and 2 partials ⚠️
src/core/task/Task.ts	50.00%	1 Missing ⚠️

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