Design VS Code UI for autocommit workflows

[SnowCheetos]

Context

A VS Code extension should provide a proper UI around autocommit rather than only exposing shell commands. The experience should make the main workflow fast while still letting users inspect, edit, and approve generated output.

Goals

• Provide command-palette entries for common workflows such as analyze, generate commit message, commit, and PR/release flows as they become available.
• Add a side panel or webview for reviewing generated commit messages, changed-file summaries, risk notes, and model/runtime status.
• Let users edit the generated commit message before committing.
• Surface progress, cancellation, and model/download/build errors clearly.
• Respect speed as a primary UX constraint: avoid unnecessary generation passes or blocking UI where possible.

Acceptance criteria

• Users can run the primary autocommit commit flow from VS Code without typing the CLI command.
• Generated output is reviewable and editable before any Git mutation.
• UI clearly distinguishes dry-run/preview actions from commit/PR/release mutations.
• The extension has basic smoke tests or documented manual QA steps for the main UI flow.