git subrepo pull (merge) momo

feat(frontend): complete UI redesign with warm monochrome theme

feat(momo): extract MomoCore/MomoEngine and add C FFI crate

docs(auth): require MOMO_API_KEYS in quick-start examples

Merge pull request #1 from zm2231/feat/http-embedding-backend

feat: HTTP embedding backend for OpenAI-compatible endpoints

fix(release): build Linux binaries on ubuntu 24.04

fix(docker): move runtime image to ubuntu 24.04

fix(embeddings): retry local model initialization on transient download errors

fix(docker): retry apt install during image build

fix(release): include staged dist binaries in Docker context

fix(release): drop macOS Intel binary from release matrix

fix(ci): install ONNX runtime for Linux test jobs

fix(ci): avoid ORT test crashes and restore upload fallback detection

fix(ci): resolve clippy regressions in runtime updates