Root README: updated variant table, API docs with joinRoom/leaveRoom, Nostr events, build instructions. Paste README: added paste-nostr description and cross-device sync info. Nostr README: full documentation for dual-sync architecture. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Four variants of the same sync library (IndexedDB, NeDB, SQLite WASM, sql.js) plus a paste-bin demo app for testing multi-browser sync via shared folders. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
