Add app CapAudio to community apps list

[SlyderSlash]

Description

Adds CapAudio to the Navidrome compatible client apps catalog.

CapAudio is a modern Android app developed by NEBUL'IA that unifies your local music library and Subsonic/Navidrome servers in a single interface. It stands out with its customizable music alarms, on-device AI-generated smart playlists (NPU), rich widgets, dynamic lyrics translation, podcast support, and offline caching.

• Official website: https://nebulia.tech/mobile/capaudio
• Play Store: https://play.google.com/store/apps/details?id=com.nebulia.audio

Type of change

• App catalog entry (new app or update) — fill in the section below
• Documentation
• Bug fix
• Styling / layout
• Other

Checklist

• The build passes (npm run build)
• I previewed my changes locally (npm start) when relevant

📱 Adding or updating an app in the catalog?

Guide: https://www.navidrome.org/docs/developers/adding-apps/

• App supports the OpenSubsonic, Subsonic, or Navidrome API
• Folder under assets/apps/ uses kebab-case (e.g. my-awesome-app)
• index.yaml has all required fields: name, url, platforms, api, description, screenshots.thumbnail
• Thumbnail is a real screenshot of the app (not a logo or icon)
• Images are WebP, max 1200px, under 500KB each (npm run convert:images <app-name>)
• npm run validate:app <app-name> passes
• I'm the app's author/maintainer, or have permission to submit it

[strix-security]

Strix Security Review

No security issues found.

_{Updated for 632b4d9.}

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Reviewed by Strix
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