v0.66.0: /copy command, marketplace management, and Missions worker improvements

New features

- /copy slash command - Copy content to your clipboard directly from the CLI
- Marketplace management - New UI for managing marketplace plugins under the Plugins section in enterprise controls (Factory App)
- Factory App version display - Factory App now shows the current version number
- Grouped exec sessions - Droid exec sessions are now grouped under a dedicated tab for cleaner organization (Factory App)

Improvements

- Missions worker reliability - Hardened Missions worker lifecycle with improved pause and resume handling

Bug fixes

- Subagent model and permissions - Fixed subagent model inheritance and permissions level
- BYOK compaction errors - Upstream error details are now surfaced in BYOK compaction failures
- Cross-provider messages - Fixed message conversion for OpenAI Responses API across providers
- Spec model display - Corrected spec model display in /model selector and prevented global fallback on clear
- Session archiving - Fixed session archive confirmation flow in the app
- Chat scrolling - Fixed scroll-to-last-message behavior in session chat (Factory App)
- User Usage Limits modal - Fixed scroll bug in the Individual User Usage Limits modal (Factory App)
- Diff generation - Fixed potential crash with non-string inputs in diff generation