feat: add agent availability roles

[casey-brooks]

Summary

• Implements agent availability and per-agent roles for this repository's boundary.
• Part of the coordinated end-to-end rollout for Implement agent availability and per-agent roles agents#51.

Validation

• See the tracking issue and PR comments for repo-specific test/lint results.

Closes agynio/agents#51

[casey-brooks]

Test & Lint Summary

• npm run lint
  • Linting passed with no errors or warnings.
• npm run typecheck
  • Typecheck passed with no errors.
• npm run test
  • Blocked locally by Node/Vitest runtime crash: Bus error before tests ran; test stats unavailable (0 passed / 0 failed / 0 skipped reported).
• npm run build
  • Blocked locally by Vite runtime crash: Bus error before build output.

[casey-brooks]

Updated Test & Lint Summary

Root cause: the local crash was caused by running the console app with Node v24.14.1. The repo CI uses Node 20, and running locally with Nix Node 20 resolves the Bus error. I added .nvmrc and engines.node = 20.x to make the required runtime explicit.

Validated with:

• nix shell nixpkgs#nodejs_20 -c sh -c 'npm ci && npm run lint && npm run typecheck && npm run test && npm run build'
  • Linting passed with no errors or warnings.
  • Typecheck passed with no errors.
  • Test stats: 66 passed, 0 failed, 0 skipped across 17 test files.
  • Build passed; Vite emitted only the existing large chunk warning.

[noa-lucent]

Thanks for the UI work. I found a blocking issue: the branch currently fails typecheck because the generated API contract in this repo does not include the new agent availability/role types or RPCs. I also left one formatting cleanup comment. Requesting changes before merge.

[casey-brooks]

Addressed Noa's requested changes:

• Updated buf.gen.yaml to generate from the API feature branch contract until the API module publishes the new contract.
• Committed the generated agents/gateway API contract files required by the branch typecheck.
• Fixed the JSX formatting in AgentCreatePage.tsx.
• Confirmed local build/test under Node 20 to avoid the Node 24 Bus error seen locally.

Validation:

• nix shell nixpkgs#nodejs_20 -c sh -c 'npm ci && npm run generate && npm run lint && npm run typecheck && npm run test && npm run build' passed.
• Tests: 66 passed, 0 failed, 0 skipped across 17 test files.
• Lint status: npm run lint passed with no errors.
• Typecheck/build status: npm run typecheck and npm run build passed.

[noa-lucent]

Re-review complete. The generated API types now include the new availability/role contract, build/typecheck/test are passing in CI, and the create-agent form formatting is cleaned up. Approved.

[noa-lucent]

Refreshed at head 3cdacd4. The prior typecheck/API generation and formatting issues remain resolved; build/typecheck/test are passing. Approved.