The archive has ~4 persons over 100 letters and ~90% with five or
fewer — the original spec's 851-letter default fit no one.
Redesign introduces three tiers gated on letterCount (Compact ≤ 5,
Standard 6–49, Rich ≥ 50) sharing one dashboard block: navy header +
4-cell stats strip at every non-Empty tier, with Standard appending
direction bar + top correspondents and Rich further appending
histogram + top locations + tag cloud. Backend skips expensive
aggregations for non-Rich persons; histogram and tag cloud ship
lazy-loaded.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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