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Small follow-up to #6957 addressing the three non-blocker findings from its review. **Draft / stacked on #6957** — the diff shows #6957's changes until it merges, then auto-narrows to just these 5 files. Mark ready + rebase onto `main` once #6957 lands. ### 1. avg-per-PDF no longer blends unsynced units over synced-only docs `avgCostMinor` now divides **synced** units (`spendUnitsThisPeriod`) by synced docs, so numerator and denominator cover the same population. Combined-billing `pendingUnits` (units-only, no doc count) previously inflated the average for linked-instance teams. The "meter units" figure still shows synced+pending (total current usage) — only the *average* is synced-only. ### 2. Empty-state: unsynced-only reads cleanly When `docs == 0` but there are pending meter units (combined-billing, nothing synced yet), the card showed a bare **"0 PDFs"** headline with a count-less summary and no split. It now shows a **"{n} meter units pending sync from linked instances"** note instead. New `unitsPending` i18n key + a `UnsyncedOnly` story. (Only reachable on the combined-billing path; pure-SaaS teams are unaffected.) ### 3. uniquePdfs wording is now accurate `document_fingerprint` is a hash of a charge's whole **input set**, so the same file reused across *different* groupings (standalone, then later in a merge `{A,B}`) counts per grouping — a close approximation of "unique PDFs", exact for the single-input common case. Softened the FE type doc + the `WalletLedgerEntry.document_fingerprint` javadoc to say so (no behaviour change; counting model unchanged). ### Verification FE typecheck / test / lint / format all clean; `:saas:compileJava` green. No behaviour change beyond #1 (avg) and #2 (empty-state copy); #3 is doc-only.