flutter_gemma_onnx 0.3.0

ONNX Runtime engine for flutter_gemma: GenAI inference on 5 native platforms + web generation (Transformers.js) & embeddings (onnxruntime-web).

0.3.0

• Add web text generation via Transformers.js (@huggingface/transformers) — OnnxEngine web arm (WebGPU/WASM, HF-repo-id models).
• Fix iOS embeddings: probe ORT GetApi down from v27 (the ORT inside onnxruntime-genai predates 1.27).
• Fix Windows embeddings: pass the model path to OrtCreateSession as UTF-16 (ORTCHAR_T is wchar_t on Windows).
• Device-verify embeddings on macOS + Linux + Windows + Android + iOS (unified onnx_embedding_device_test).

0.2.0

• Add web support for OnnxEmbeddingBackend via onnxruntime-web (WebGPU/WASM, WordPiece models).
• OnnxEngine (text generation) declines on web for now — Transformers.js support is a fast-follow.

0.1.0

• Initial release: OnnxEngine — ORT-GenAI text generation over dart:ffi, macOS/Linux/Windows/Android/iOS arm64.
• Add OnnxEmbeddingBackend: plain ONNX Runtime embedding forward pass over dart:ffi (no ORT GenAI).
• Fix ORT/GenAI co-location via ORT_LIB_PATH (dladdr) — no Podfile/packaging step needed.
• Harden GenAiFfiClient lifecycle: cancel/stop/close races can no longer wedge the mutex or hang a caller.
• Platform-gate both engines to macOS/Linux/Windows/Android arm64 + iOS arm64; other hosts fail loud, not with a confusing native error.
• Add OrtClient/OrtFfiClient: injectable ORT 1.27.0 C API seam, fake-testable with zero dlopen.
• Verified against real all-MiniLM-L6-v2 (WordPiece) and EmbeddingGemma-300M-ONNX (SentencePiece) models on macOS.