Bump sdk_version 5.7.1 -> 5.12.0 (fixes ZeroGPU quota for logged-in users)

Remove hf_oauth + LoginButton — they conflict with native ZeroGPU auth

Use only valid OAuth scope: inference-api

Add LoginButton + hf_oauth: required for ZeroGPU Pro quota in iframe context

Remove hf_oauth/LoginButton, pre-download models in build phase

Enable hf_oauth so visitors authenticate and get proper ZeroGPU quota

Bump sdk_version to 5.7.1 (HF Spaces was forcing gradio 4.44.0)

Remove emoji from Space card metadata

Initial deploy: Apple/Claude design, DuckDB, 3 trained LoRAs

initial commit