Summary

Updates the app-hub Plugin Store to consume the generated community store registry and display separate Plugins/Themes tabs.

Changes

• Replaces the old single YAML list view with a card-based community store browser.
• Adds Plugins and Themes tabs.
• Fetches static registry/store.json from GitHub Pages, with temporary raw fallbacks while the plugin-store PR is being reviewed.
• Shows full preview images with object-contain instead of cropping.
• Adds skeleton/loading states and per-listing details on click.
• Hides the details panel until a listing is selected, supports click-away close, and adds a small slide/fade animation.
• Avoids rendering Repository/Release/Download buttons when no corresponding link exists.

Dependency

Depends on PenguLoader/plugin-hub#2 landing or otherwise making registry/store.json available from Pages. For testing before that lands, this branch currently falls back to the generated JSON in Ku-Tadao/plugin-hub:feature/discord-forum-registry.

Validation

• Verified the raw fork registry URL returns HTTP 200 with 46 listings.
• Ran pnpm --filter @pengujs/hub build successfully.
• Ran Windows Release x64 MSBuild successfully.