Replace the fragile auto-install-via-bun approach with a bundled qmd binary.
The build script (scripts/bundle-qmd.sh) compiles qmd into a standalone
binary using `bun build --compile`, then packages it with sqlite-vec native
extensions and a node-llama-cpp stub for keyword-only search.
Key changes:
- find_qmd_binary() now returns QmdBinary with path + work_dir, checks
bundled resource first (app bundle and dev mode), then system paths
- All Command::new(qmd_path) calls updated to use QmdBinary::command()
which sets the correct working directory for node_modules resolution
- Removed auto_install_qmd() and find_bun() — no longer needed
- Tauri config bundles resources/qmd/** into the app
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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