Adds the ability to connect to OpenAI, Mistral, Google, Cohere, Together,
Fireworks, and Perplexity from the Studio chat interface.
- Provider configs stored in SQLite (no API keys persisted)
- RSA-2048 key pair generated at startup for client-side key encryption
- httpx proxy client streams SSE responses in OpenAI-compatible format
- New /api/providers routes: registry, CRUD, test, models
- /v1/chat/completions routes to external provider when provider fields present
- Integration test suite covering CRUD, connection, model listing, and inference
- Frontend spec doc with full API contract
* feat: support full model GGUF export, disable incompatible methods in UI
* fix: resolve base model from config.json for venv_t5 export switching
* feat: detect BNB-quantized models and disable all export methods for quantized non-PEFT checkpoints
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* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* fix: relocate Ollama Modelfile alongside GGUFs during non-PEFT export cleanup
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* fix(seed): disable remote code execution for seed inspect loads
* fix(test): use __file__-relative path in seed test
The test used a CWD-relative path (`studio/backend/routes/...`) which
only resolved when pytest was invoked from the repo root. Use
`Path(__file__).resolve()` so the test passes regardless of CWD.
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