v0.1.24

Added

• okf serve [dir] [--port] [--open] — launch a local HTTP server for any bundle directory. Zero dependencies, auto-detects visualization HTML.
• okf/_viz_template.py — embedded HTML template (base64) so okf visualize works from PyPI without external files.

Fixed

• okf visualize no longer fails with demo.html not found when installed from PyPI — template is now bundled inside the package.

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