fix: handle externally-managed Python environments (PEP 668)

fix: handle audio URL path duplication

fix: correct CLI detection when run via bin symlink

debug: add debug logging

fix: handle CLI detection when run via bin wrapper

feat: auto-install Python deps on first run, remove postinstall script

fix: add proper postinstall script for cross-platform npm installs

fix: remove npm scope for GitHub installs

Add npm support

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