smith: fix PTY prompting editor-state flow

[edwin-zvs]

Summary

• Threaded smith prompt mode through all tool-running/input-drive paths in adapter-smith.
• Fixed compile break by passing emit_editor_state bool into run_one_tool, run_with_supervisor, and relay/input-drive helpers.
• Kept behavior where:
  • CONSTRUCT_SMITH_PTY_PROMPT=on enables PTY inline prompt (legacy behavior)
  • CONSTRUCT_SMITH_PTY_PROMPT=off|0|false enables bottom-editor EditorState updates.
• Added tests for env parsing and preserved existing adapter-smith coverage.

Validation

• cargo test -p construct-adapter-smith

Closes the WIP issue where CONSTRUCT_SMITH_PTY_PROMPT mode caused tool-run input relay breakage and editor-state duplication.