Summary

• Add a visible Agent label beside the frontend chat agent selector while keeping the existing accessible select label.
• Expose agent selector labels through frontend_agent_chat_config so themes/plugins can rename the control, e.g. to Brain.
• Clean up existing lint/static-analysis issues in touched PHP files so the repo lint gate passes.

Testing

• npm install
• npm run build
• homeboy lint --path . --extension wordpress
• homeboy test --path . --extension wordpress (activation/install passed; no PHPUnit tests discovered in current repo state)

AI assistance

• AI assistance: Yes
• Tool(s): OpenCode (GPT-5.5)
• Used for: Added the filterable label plumbing and visible selector label, cleaned related lint findings, and ran local verification. Chris remains responsible for review and acceptance.