The session store rebuilt the rag namespace from four known keys, so the
evidence record never survived a turn, let alone a reload from localStorage.
Compaction then ran with an empty ledger: earlier evidence was replaced by
receipts retaining nothing, while the citations already in citation_index kept
the UI looking correct.
The UI still names the fields it reads, but everything else in the namespace
passes through untouched, and seeding the namespace no longer replaces sibling
namespaces.
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