feat: implement AI-driven recommendation service and integrate Qwen2.5/mDeBERTa model management into FastAPI lifecycle

feat: implement RecommendationService to generate YouTube video suggestions based on user note categories and keyword extraction

feat: implement local model inference with Qwen2.5 and mDeBERTa, and add recommendation system service.

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Merge branch 'main' of https://huggingface.co/spaces/ATInc1/AIdea-Server

try use keybert model

revert: rollback project files to stable chat backend (commit f1332f7)

add keybert model in requirments.txt and pyproject.toml

feat: implement Pydantic configuration management, add end-to-end pipeline testing, and include documentation for the recommendation module.

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update Recommendation

update recommendation

update API

check

API youtube

add youtube api

Refactor: Move Gemini API logic to backend, clean up Flutter UI, and secure credentials

server v2