fix: sync recent imports with vault state

fix bug

fix: button stuck on "가져오는 중" after import completes

feat: organize concept notes inside subject folders

feat: slide selection UI before import

feat: enhance summaries with transcript details

feat: use transcript for LLM summarization on memo-only notes

feat: support transcript-only notes (memo type)

readme.md update

docs: add Alt app guide and community plugin review status

docs: add README with end-to-end usage guide and MIT license

feat: initial Alt2Obsidian Obsidian plugin