Collapse nested kbsearch/chats go.mod into the root module. Ranking stays cgo-free under internal/brain/rank so CI does not need ladybug. bin/kb/search is a deprecation wrapper that still sets CGO and builds the binary.
- bin/mail/sync.go: async Go sync engine (8 workers, paginated Gmail via API + OnlyOffice IMAP); Gmail attachments key off body.attachmentId, not MIME partId; ICS sidecars Latin-1->UTF-8 normalized (TestICSToMarkdownNormalizesLatin1) - bin/mail/import: message.json -> markdown; PDFs via pdftotext -layout fast path with docling subprocess fallback for the ~5% textless files - bin/mail/index_mail: fresh-rebuild indexer (repo corpus + mail) avoiding ladybug WAL corruption on bulk-insert into indexed DBs; split from import - bin/kb/index: keep FTS/VECTOR indexes across incremental runs (drop+recreate leaves stale backing tables killing the vector index) - docs: README/PLAN/AGENTS cover the mail pipeline Result: 17,835 messages -> 28,918 info leafs, FTS+HNSW healthy.