fix: prevent race condition in document indexing

fix: allow empty notes and hide TopBar in AI chat view

refactor: move auto-save logic to updateNote with debounce

fix: switch to lightweight bge-small-zh-v1.5 model for low-memory servers

feat: bundle embedding model in Docker image for offline deployment

fix: sync note deletions with backend API

feat: add HuggingFace mirror endpoint for servers without direct access

fix: remove demo notes and sync note ID with backend after creation

fix: use nullish coalescing for API_BASE_URL to properly handle empty string

fix: set NEXT_PUBLIC_API_URL to empty string to prevent double /api prefix

fix: correct network name to travelmind_travelmind-network

fix: add missing frontend/src/lib files and fix .gitignore

fix: upgrade Node.js to 20 for Next.js compatibility

fix: convert frontend from submodule to regular directory

feat: add production deployment configuration