fix(env): add Node.js preload to strip Steam null-byte env vars

refactor(threads): format long lines and add explicit-thread test

feat(threads): explicit-only thread creation, Slack-style

refactor: remove dead inbox code in favor of threads

feat(mcp): merge project .mcp.json servers into agent configs

fix(threads): add session token to thread API requests

chore(app): normalize line endings CRLF to LF on thread endpoints

feat(routing): reply-aware agent routing with loop guard

chore: add agent configs and update launchers

fix(chat): move /thread handler before mention prepend

feat(threads): thread panel, store, and REST API

feat(ui): extract sidebar layout and channel context menus

merge: per-actor inbox backend from feat/phase1-threads

feat(inbox): per-actor attention events with read/done state

feat(ui): replace top-tab layout with sidebar, thread grouping, and inbox