* Period-over-period comparisons on the scorecards (the BI brief shows
  "X% desde el último periodo" arrows on every KPI). In o-spreadsheet
  this is wired through ``baseline`` references plus a comparison
  range on the date global filter. Postponed until the four dashboards
  are validated by the customer in production.

* Quarter-level selection (*Q1..Q4*) on the ``Period`` filter. The
  o-spreadsheet date filter in Odoo 16 only accepts a single
  ``rangeType`` per filter; we picked ``month`` because it is the
  finest granularity. A second date filter with ``rangeType:
  "quarter"`` would coexist visually but duplicate the year picker,
  which the customer rejected. Revisit in Odoo 17 where the filter
  UI allows choosing the granularity dynamically.

* Rolling-window date filter (*Last 30 / 90 / 180 days*) as an
  alternative to the month picker. Same limitation as above (one
  ``rangeType`` per filter).

* "Sales concentration" KPI on the Categories dashboard: share of
  sales captured by the top 20% of buying members. The Top buyers
  pivot already exists in the Members dashboard; only an aggregation
  formula plus a scorecard would be needed.

* Stricter definition of **Members penetration** as ``distinct member
  buyers / total members in the cooperative`` (instead of the current
  ``/ total buyers in the period``). Requires sourcing the total from
  ``share.line`` rather than from ``report.pos.order``.

* Translate ``spreadsheet.dashboard.name`` / ``spreadsheet.dashboard.group.name``
  so the entries in the *Dashboards* menu render in the user's
  language (currently always English: *POS Overview*, *POS Members*,
  etc.). Blocked upstream: the core ``name`` fields are not declared
  ``translate=True``. Either patch the core fields downstream or rename
  the records to the customer's primary language in the XML.

* Add Galician, Catalan, French, Dutch and Croatian translations.
  Spanish (``es.po``) ships out of the box. The other locales can be
  produced from the same ``.pot`` by translating each ``msgstr``.