Editor, toolbar, and button components with the lib they share, consumed by the mission briefing section and side-op dialogs.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
- Missions.codeName is now optional (still unique when set); migration included
- Campaign and side-op dialogs accept an optional cover image (uploadUgcImage)
- Reminder toasts, evaluation aggregates, calendar, cards and mission headers
handle a null code name
- Mission read filter no longer hides drafts by status; visibility follows
ownershipAndStatus.visibility only
