Add drift-badge, env-var-editor, env-var-row components and replace the
environment-tab stub; install shadcn Switch which was missing.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Extracts Paperclip companies + tag-mappings UI into PaperclipTab component,
adds stub tabs for Environment / Tools / Registrations, and replaces the flat
page.tsx with a shadcn Tabs layout to make room for Tasks 8-10.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>