VS Code Extension Release Workflow

Follow this workflow for the current repository.

Prepare local build verification

Verify release target files in packages/vscode and confirm current branch state.
Run pnpm install --frozen-lockfile.
Run pnpm -C packages/vscode run package.
Read packages/vscode/package.json and confirm the current extension version.
Confirm the VSIX exists at packages/vscode/difit-vscode-<version>.vsix.
Ask the user to smoke test the local VSIX install in VS Code:
- Install from VSIX.
- Confirm the difit command opens review correctly.
- Confirm the toolbar button/icon appears and works.
Ask for explicit OK in Japanese before publishing.