Orca 1.8.4

Fixed

• Complete the 1.8.3 install/setup unification in the source tree — the v1.8.3 tag was missing the file moves (the published npm package was already complete); v1.8.4 has the full, buildable tree.
• orca setup in a non-interactive shell now words its guidance for an interactive terminal and honors --reset; the launcher's "open web UI" prints the URL over SSH instead of claiming a browser opened.

Changed

• Post-review cleanup: removed dead code (an unused step-result field), de-duplicated the cross-platform browser opener between the launcher and the wizard, and simplified slug/id derivation. No wizard behavior change.