When ElectrumX is indexing and can't accept TCP connections, the UI
now shows the actual index size (e.g. "126.9 GB") in the Indexed
Height field instead of a generic "Building..." label. Also shows
the size in the status message for better progress visibility.
Updated estimated full index size from 55GB to 130GB (2026 mainnet).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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