Summary

• Add a daemon-side preview poller that detects active worker HTML entrypoints and updates the Browser tab through the existing SetPreview/CDC path.
• Make bare ao preview prefer the workspace entrypoint, normalize stale relative targets, and support absolute local file paths as file:// URLs.
• Keep the renderer/browser host compatible with older daemons and local file preview targets.

Verification

• go test ./internal/preview ./internal/httpd/controllers ./internal/daemon ./internal/cli
• npm.cmd run typecheck
• npm.cmd run test -- src/renderer/hooks/useBrowserView.test.tsx src/main/browser-view-host.test.ts

Note

• Full backend go test ./... was also run and reached unrelated existing Windows/local failures in agent/cline executable-bit checks, gitworktree shell/path expectations, stale OpenAPI specgen, legacyimport path expectations, and Windows symlink privilege.