Fix: correct the Seerr icon and centre the badge screenshots

[SandObserver]

Summary

• Point the Seerr tile at the seerr icon rather than the Jellyseerr one.
• Recapture badge-labels.png and badge-list.png with the three tiles centred in a frame as wide as the docs content column, so the tiles render at their real size instead of being upscaled.
• Open the badge list on the middle tile so it needs no extra margin on one side.
• Update the badge-labels figcaption to the tile order in the new capture.

Testing
All green: npm run build and npm run check both pass. Verified the Badges page in Chrome in both colour schemes and both docs themes, and measured the rendered image width against the content column.

Checklist

• npm run build and npm run check both pass.
• Product UI is shown by running or capturing it, never recreated in CSS.
• Any new preview or screenshot carries no private hostnames or real data.
• Visual changes verified in both colour schemes and both docs themes.
• Links to the app repo still resolve.

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