Update README.md

[lessthanno]

Outcome

Describe the user-visible result and affected target.

Control and safety

• Read-only intents remain read-only.
• Writes require an explicit target and approved plan.
• Figma context changes stop stale writes.
• No personal paths, file IDs, account data, secrets, or private documents are included.

Verification

• npm run verify
• English and Simplified Chinese user journeys remain aligned.
• Real Figma E2E was run when runtime behavior changed.

Include the exact commands and sanitized observed results.