v0.2.1

Everything the app needs now ships in the box: the llama.cpp engine (with expert streaming) and the Node.js runtime for the harness chat are bundled, checksummed, and documented in THIRD_PARTY_LICENSES.md — a fresh Mac works with zero terminal commands. Plus: missing 3D model weights download with one click, every generated image gets a Make-it-3D button, the 3D tab can draft its source image from a text description, and all status messages are written in plain language.