Day 1: perbaikan Space penuh, warm-up, error ramah, konstanta UI

Space boot: Gradio demo fix, requirements tanpa llama, tanpa preload

Prioritas pre-Day2: shard loader, diagnosis Space, README lokal, verify script

Tambah skrip commit tanpa Co-authored-by Cursor

Day 1: foundation — ekstraksi JSON, Gradio minimal, trace logger