Feature: Allow whitelisting sites (including localhost) in Claude in Chrome extension

Feature Request

Currently there's no way to whitelist specific sites like localhost from the Claude in Chrome extension options menu in the browser. The extension settings UI shows site permissions but doesn't provide a way to add new ones.

Requested

1. Extension UI: Add ability to whitelist specific sites (including localhost) from the extension options/popup menu in Chrome
2. CLI command: Add a /chrome-permissions slash command (or similar) in Claude Code CLI to manage site permissions directly from the terminal (e.g. claude /chrome-permissions add localhost)

Use Case

When developing and testing local web apps/visualizations, Claude needs to screenshot and interact with pages served on localhost. Currently the permission denial blocks this workflow, and there's no way to grant access from the extension's settings UI — you can see the site-level permissions list but cannot add entries.

Steps to Reproduce

1. Start Claude Code with claude --chrome
2. Serve a local page on localhost:8770
3. Try to navigate: mcp__claude-in-chrome__navigate to http://localhost:8770/...
4. Get "Permission denied by user" — no way to grant permission from the extension UI

Environment

• Claude Code with --chrome flag
• Chrome extension: Installed, enabled
• OS: Windows 11