May 9

1. 14:49

   Add BYOK (Bring Your Own Key) feature, Tutorial screen, and fix Docker mv command

   Hackathon Builder
   6a059ac
2. 14:45

   Fix Docker build: remove backend/static and rm before mv

   Hackathon Builder
   3ed4d44
3. 14:39

   UI enhancements: Big upload dropzone, Demo button, PDF OCR parsing

   Hackathon Builder
   d23fef9