feat(slots): blobs panel card + gate blob downloads on finality#438
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- Add a 'Blobs' card to the detail-page Blobs tab listing each blob's versioned hash and KZG commitment from the live fct_block_blob_head table. The previous panel only had the Blob Submitters card, which is empty (dim_block_blob_submitter has no data), so recent slots showed no blobs. - Disable blob download buttons (show 'Pending') in the download modal until the slot finalizes (~2 epochs), since blobs aren't in the archive until then. Block downloads remain available immediately.
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Two fixes to the slot detail blob UX, both driven by the live
fct_block_blob_headtable.Blobs panel card. The detail-page Blobs tab only had a 'Blob Submitters' card sourced from
dim_block_blob_submitter, which returns no rows (even for day-old slots), so the panel showed no blobs. Add a 'Blobs' card listing each blob's index, versioned hash, and KZG commitment fromfct_block_blob_head(real-time).Finality-gated blob downloads. A slot's blobs aren't in the blob archive until it finalizes (~2 epochs / ~13 min), so the modal's blob Download buttons now show a disabled 'Pending' state with an explanatory footer until then; they enable once finalized. Verified against the archive: a 4-min-old slot 404s, a 14-min-old slot returns 200. Block downloads remain available immediately. The gate (
wallClockSlot - slot >= 64) flips reactively as the chain head advances.