Replace the GitHub Contents API tree-walk with a flat manifest approach.
template-manifest.json lists every file and empty directory in the starter
template; download_template() fetches the manifest then pulls each file
directly as a raw URL, sidestepping git API rate limits and making the
template hostable from any HTTP source.
- GITHUB_CONTENTS_API / _github_get / _download_tree removed
- TEMPLATE_BASE_URL + TEMPLATE_MANIFEST constants added
- _http_get() replaces _github_get() (generic, no GitHub headers)
- download_template() accepts optional base_url for custom sources
- app/template-manifest.json added (v0.4, 35 files, 2 empty dirs)
- Generated files (manifest.json, service-worker.js, search.json)
excluded from manifest — they belong to mdcms build output, not
the starter template
https://claude.ai/code/session_01Ai8xRvmrzdhuTKiRQ2fnn9
