fix(compare): expert sign-off must-fixes — phase-matched admissions, Ofsted sentinel codes, selective-school copy

M1: admissions rounds are now selected by the active phase tab
(admissionsForPhase) — an all-through school's Year 7 round no longer
masquerades as Reception odds beside pure primaries; honest per-cell and
section fallbacks name the round (Reception / Year 7).
M2: Ofsted sentinel codes (9 = not applicable) never render as judgement
chips, and the sixth-form judgement — previously dropped — now renders
for schools that have one.
M3: 'What this means' is phase- and type-aware: selective schools get
entrance-test framing, secondary faith schools a faith-criteria note, and
the primaries' distance template never appears on the secondary tab
(admissions_policy now exposed in compare school_info).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0146VHeLAWjDVE2B5uU67jCB

nextjs-app/components/compare/CompareOfsted.tsx

@@ -108,14 +108,21 @@ function JudgementDetailCell({
     );
   }
 
-  const legacyAreas: Array<[string, number | null]> = [
+  const legacyAreas: Array<[string, number | null | undefined]> = [
     ['Quality of education', ofsted.quality_of_education],
     ['Behaviour & attitudes', ofsted.behaviour_attitudes],
     ['Personal development', ofsted.personal_development],
     ['Leadership & management', ofsted.leadership_management],
     ['Early years provision', ofsted.early_years_provision],
+    ['Sixth form provision', ofsted.sixth_form_provision],
   ];
-  const published = legacyAreas.filter(([, grade]) => grade != null);
+  // Only real Ofsted grades (1–4) are judgements. The MI file uses sentinel
+  // codes for "not applicable / no judgement" (9, and 0/8 variants) — those
+  // must never render as a rating chip.
+  const published = legacyAreas.filter(
+    (entry): entry is [string, number] =>
+      entry[1] != null && entry[1] >= 1 && entry[1] <= 4,
+  );
 
   if (published.length === 0) {
     return (