* fix(frontend): support standalone demo APIs and runtime GitHub stars
* Update API origin URL to use environment variables
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
* test(frontend): align static demo tests with runtime origin
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Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>