Recall 0.3.6

Recall now works on a standard Windows install. Previously the plugin would
install and the slash commands would appear, but nothing was ever captured or
surfaced — every failure was swallowed by the defensive handling that keeps
Recall from crashing a Claude Code session. Three independent Windows-specific
bugs were responsible, all reported in #6 by @driano1221.

🪟 Fixed

• python3 not found. The hooks and /recall:save invoked python3, which
  a standard Windows install doesn't provide, so capture and the session recap
  never ran. They now fall back to python (python3 … || python …, valid in
  both cmd and POSIX sh).
• Transcript directory never matched. Recall didn't reproduce Claude Code's
  Windows project-dir encoding — the drive colon, backslashes and spaces all
  become - (e.g. C:\foo bar → C--foo-bar) — so /recall:save and session
  resume reported "no session transcript found." It now derives the name
  correctly, which also fixes Unix/macOS paths that contain spaces.
• Recap crashed on emoji. The session-start recap printed non-ASCII that
  raised UnicodeEncodeError under Windows' default cp1252 console, silently
  dropping the recap even when a saved context.md existed. Output is now UTF-8.

These preserve Recall's core guarantee — failures stay silent so they can never
break your session — they just no longer make the plugin invisible on Windows.

Thanks again to @driano1221 for an exceptionally detailed report.

Full changelog: v0.3.5...v0.3.6