LivePremier Plus v0.4.0-preview.2 (preview)

Fixes the Windows desktop app, which could never start the server.

Tauri's resource_dir() is current_exe().canonicalize(), and on Windows that
returns a verbatim \\?\ path. Win32 performs no normalisation inside one, so a
forward slash stops being a separator: the launcher's {resource}/node resolved
to nothing, the .exe fallback's existence check was false for both spellings,
and clicking Start did nothing at all — silently, with no error in the panel.

• Windows paths are de-verbatimed and spelled with backslashes before anything is
  spawned or read.
• The spawned server no longer pops a console window over the panel.
• The gear button reports the real config directory instead of a hardcoded macOS
  path.

macOS and Linux are unaffected by the path fix.

Verified end to end on Windows 11 x64: the panel reaches RUNNING, the embedded
runtime spawns, and the server answers.