docs: update AGENTS.md guidelines and add comprehensive UI/UX implementation plan

fix: add missing meeting_summarizer module to Dockerfile for HF Spaces deployment

Add bilingual support: English and Traditional Chinese (zh-TW)

Update AGENTS.md with Gradio app coverage and deployment info

Add HuggingFace Spaces demo with Gradio UI

separate Qwen3 thinking blocks into thinking.txt and summary.txt