Recorder and pages gain a spoiler gate; voiceover lib adds clause-pause pacing support.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Add /voiceover script list and take detail pages, teleprompter reader, voice capture/recorder components, submission server actions with a 9 MB audio cap, and a Contribute > Voiceover entry in the user menu.
Ultraworked with [Sisyphus](https://github.com/code-yeongju/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
