Sequence Flows

Fig. 4 — Data now loads per-collection and on-demand, rather than one document for the whole company.

Fig. 5 — Same shape as before, but writes now target the project's own document plus its summary mirror instead of one shared company document.

Fig. 6 — Same shape as before; the provider behind the cache changed from Avalara AvaTax to ZipTax.

Fig. 7 — The core math (steps 1, 2, 4) now lives in a small, unit-tested module instead of inline in App.jsx.

Fig. 8 — Unchanged. Still no xlsx/exceljs dependency; see Technical Risk Notes.

Fig. 9 — "Remembered device" is really a per-company, per-account expiry stamped into the Auth token, not a browser cookie.

Fig. 10 — Both steps require Company Admin. Project Storage files, Auth passwords, and cache/edit-presence records are never part of this flow either direction — see Cloud Functions Reference.