fix(school): the Ofsted section shows the grade still in force and the latest visit

The section is dated by the latest visit and headlines the grade still in force with the inspection that awarded or confirmed it, or 'No overall grade'. A later visit that isn't the grade's source gets its own line, with an ungraded outcome such as 'Standards maintained'. The primary and secondary no-grade branches merge, so the secondary page no longer drops the sixth-form and early-years judgements (audit M2), and 'Not rated' goes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

nextjs-app/components/school/PrimarySchoolSections.tsx

@@ -55,15 +55,17 @@ export function PrimarySchoolSections({
   const secondaryAvg = nationalAvg?.secondary ?? {};
 
   const isReportCard = !!(ofsted?.report_card && Object.keys(ofsted.report_card).length > 0);
-  // Report cards are dated by their own inspection (rc_inspection_date), never
-  // the legacy inspection_date (report cards exist only from Nov 2025).
+  // Report cards are dated by their own inspection (rc_inspection_date);
+  // anything else by the school's latest visit, never the older inspection a
+  // grade may come from.
   const ofstedInspectedDate = isReportCard
     ? ofsted?.rc_inspection_date ?? null
-    : ofsted?.inspection_date ?? null;
+    : ofsted?.latest_visit?.date ?? null;
   const oeifAreas = ofsted ? ofstedLegacyAreas(ofsted) : [];
   const oeifAllSameGrade =
     !!ofsted &&
     !isReportCard &&
+    ofsted.overall_effectiveness != null &&
     oeifAreas.length >= 3 &&
     oeifAreas.every((a) => a.value === ofsted.overall_effectiveness);
 
@@ -77,7 +79,6 @@ export function PrimarySchoolSections({
           ofstedInspectedDate={ofstedInspectedDate}
           oeifAllSameGrade={oeifAllSameGrade}
           oeifAreas={oeifAreas}
-          variant="primary"
         />
       )}