- Fix tab highlight not updating visually — switch from class={tabClass()}
to Svelte's class:active directive for proper reactive class binding
- Rewrite README.md with full project structure, architecture, build guide
- Rewrite build.sh to build both GUI and server, output to build/
- Add scripts/build.sh for granular builds (gui/server/all)
- Add build/, frontend-dist/, and test vault dirs to .gitignore
- Remove stale binaries from project root
- Update AGENTS.md session summary
- Add ClientSequence and LastSeenServerSeq fields to sync.Op struct
- Fix Client.Push() to copy these fields to PushOp
- Add GetDeviceID() method to sync.Service