desktop-v0.1.16

## What's Changed
* compose: Drop the repeated Send later heading from its time picker by @elie222 in https://github.com/elie222/inbox-zero/pull/3874
* docker: Keep prerendered RSC payloads valid when replacing placeholders by @afonsojramos in https://github.com/elie222/inbox-zero/pull/3860
* mcp: Allow custom MCP servers that need no authentication by @elie222 in https://github.com/elie222/inbox-zero/pull/3876
* llm: Track multi-step cost, compact tool-heavy chats, and tolerate partial Outlook delta items by @elie222 in https://github.com/elie222/inbox-zero/pull/3877
* gmail: Sync renamed mailbox addresses during watch renewal by @elie222 in https://github.com/elie222/inbox-zero/pull/3875
* mail: Keep editing a Gmail draft after its autosave syncs back by @elie222 in https://github.com/elie222/inbox-zero/pull/3878
* mail: Tidy reply delivery status layout and copy by @elie222 in https://github.com/elie222/inbox-zero/pull/3879
* assistant-chat: Trim stale tool results in long tool loops by @elie222 in https://github.com/elie222/inbox-zero/pull/3880
* docs: Add self-hosting security hardening page by @elie222 in https://github.com/elie222/inbox-zero/pull/3882
* mail: Pop a reply out of the thread into its own window by @elie222 in https://github.com/elie222/inbox-zero/pull/3881
* docs: Explain how Docker Compose finds the app env file by @elie222 in https://github.com/elie222/inbox-zero/pull/3883
* mail: Show a sent reply in the thread the moment it leaves the composer by @elie222 in https://github.com/elie222/inbox-zero/pull/3885

## New Contributors
* @afonsojramos made their first contribution in https://github.com/elie222/inbox-zero/pull/3860

**Full Changelog**: https://github.com/elie222/inbox-zero/compare/desktop-v0.1.15...desktop-v0.1.16