fix: validate URLs upfront — reject invalid/non-YouTube URLs immediately

fix: skip yt-dlp DNS retries for YouTube URLs on ZeroGPU

feat: expose all mazinger features in HF Space

fix: silent output from assemble + build failure on HF Spaces

feat: YouTube support via yt-proxy helper Space

fix: handle ZeroGPU network restrictions (YouTube/DNS blocked)

feat: add logo, slicing, source language, subtitle styling

fix: read profile script file content before passing to create_voice_prompt

fix: align all Mazinger API calls with actual signatures

feat: pipeline orchestrator with split GPU allocation