fix(design): keep below/attention off the brand hue, harden the share-card fonts

Review follow-up on #86.

The blind coral -> brand rename recreated the exact collision this PR set out
to remove: coral had been both the primary CTA and the "below average" signal,
so every negative indicator followed --primary onto iris. Sixteen rules moved
back onto the status ramp — delta chips, trend-down arrows, progress-negative
values, statusBad, chipBad/badgeBad, and the urgent deadline chips.

The Ofsted scale had also lost its worst step, with grade 4 landing on brand
while 1-2 were teal and 3 was amber. It now escalates by weight rather than by
reaching for another hue: a tinted amber chip for "requires improvement", a
solid amber one for "inadequate" (5.1:1 light, 7.7:1 dark). Report-card grade 5
follows the same rule.

globals.css now describes status as valence — teal above/good, amber
below/needs-attention — which is what it has to mean for an urgent deadline,
rather than the narrower "comparison point only" the first draft claimed.

On the share-card fonts: /opengraph-image is prerendered, so the font read
happens in the builder stage where assets/ exists, and the baked PNG ships
inside .next/standalone/.next/server/app/. File tracing independently places
the fonts at .next/standalone/assets, which the existing standalone COPY
carries to /app/assets. So the reported ENOENT doesn't occur — but it depends
on the tracer resolving a runtime join(), and a miss would be a silent 500
rather than a build failure. Declared outputFileTracingIncludes for the route
and made the Dockerfile COPY explicit so neither is left to inference.

Also repointed the immutable Cache-Control rule from the deleted favicon.svg
to app/icon.svg, where it was caching a 404.

Verified: tsc clean, 159/159 tests, clean rebuild prerenders all three image
routes with the fonts present in standalone.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

nextjs-app/components/AdmissionsView.module.css

@@ -181,8 +181,8 @@
 .chipOffer::before    { background: var(--status-above); }
 
 .chipUrgent {
-  border-color: rgba(var(--brand-rgb), 0.4);
-  background: rgba(var(--brand-rgb), 0.04);
+  border-color: rgba(var(--status-below-rgb), 0.4);
+  background: rgba(var(--status-below-rgb), 0.04);
 }
 
 .chipTrack {
@@ -218,7 +218,7 @@
 
 .chipDeadline .chipDays,
 .chipUrgent .chipDays {
-  color: var(--brand-strong);
+  color: var(--status-below);
 }
 
 .chipOffer .chipDays {

nextjs-app/components/DeltaChip.module.css

@@ -28,8 +28,8 @@
 }
 
 .bad {
-  background: var(--brand-bg);
-  color: var(--brand-strong);
+  background: var(--status-below-bg);
+  color: var(--status-below);
 }
 
 .neutral {

nextjs-app/components/HomeView.module.css

@@ -1308,8 +1308,8 @@
 }
 
 .countdownChipUrgent {
-  border-color: rgba(var(--brand-rgb), 0.4);
-  background: rgba(var(--brand-rgb), 0.04);
+  border-color: rgba(var(--status-below-rgb), 0.4);
+  background: rgba(var(--status-below-rgb), 0.04);
 }
 
 .chipTrack {
@@ -1350,7 +1350,7 @@
 
 .countdownChipDeadline .chipDays,
 .countdownChipUrgent .chipDays {
-  color: var(--brand-strong);
+  color: var(--status-below);
 }
 
 .countdownChipOffer .chipDays {

nextjs-app/components/HomeView.tsx

@@ -604,7 +604,7 @@ function CompactSchoolItem({ school, onAddToCompare, isInCompare, nationalAvgRwm
               ...(ofstedBadge.cssClass === 'ofsted1' ? { background: 'var(--status-above-bg)', color: 'var(--status-above)' } :
                   ofstedBadge.cssClass === 'ofsted2' ? { background: 'var(--status-above-bg)', color: 'var(--status-above)' } :
                   ofstedBadge.cssClass === 'ofsted3' ? { background: 'var(--status-below-bg)', color: 'var(--status-below)' } :
-                  ofstedBadge.cssClass === 'ofsted4' ? { background: 'var(--brand-bg)', color: 'var(--brand)' } :
+                  ofstedBadge.cssClass === 'ofsted4' ? { background: 'var(--status-below)', color: 'var(--text-inverse)' } :
                   ofstedBadge.cssClass === 'ofstedRc' ? { background: 'var(--phase-secondary-text)', color: 'var(--text-inverse)' } :
                   ofstedBadge.cssClass === 'ofstedPending' ? { background: 'var(--bg-secondary)', color: 'var(--text-muted)' } :
                   { background: 'var(--bg-secondary)', color: 'var(--text-muted)' }),

nextjs-app/components/LeafletMapInner.tsx

@@ -58,7 +58,7 @@ function buildPopupBadge(school: School): PopupBadge {
       1: 'background:var(--status-above-bg);color:var(--status-above)',
       2: 'background:var(--status-above-bg);color:var(--status-above)',
       3: 'background:var(--status-below-bg);color:var(--status-below)',
-      4: 'background:var(--brand-bg);color:var(--brand)',
+      4: 'background:var(--status-below);color:var(--text-inverse)',
     };
     return { label: `${labels[school.ofsted_grade]}${yearStr}`, style: colours[school.ofsted_grade] };
   }

nextjs-app/components/SchoolCard.module.css

@@ -132,8 +132,8 @@
 }
 
 .trendDown {
-  color: var(--brand);
-  background: var(--brand-bg);
+  color: var(--status-below);
+  background: var(--status-below-bg);
 }
 
 .trendStable {

nextjs-app/components/SchoolRow.module.css

@@ -139,7 +139,7 @@
 }
 
 .trendUp    { color: var(--status-above); }
-.trendDown  { color: var(--brand); }
+.trendDown  { color: var(--status-below); }
 .trendStable { color: var(--text-muted); }
 
 /* Line 4: location */
@@ -204,7 +204,7 @@
 .ofsted1 { background: var(--status-above-bg); color: var(--status-above); }
 .ofsted2 { background: rgba(var(--status-above-rgb), 0.12); color: var(--status-above); }
 .ofsted3 { background: var(--status-below-bg); color: var(--status-below); }
-.ofsted4 { background: var(--brand-bg); color: var(--brand); }
+.ofsted4 { background: var(--status-below); color: var(--text-inverse); }
 
 /* ── Ofsted badge variants ──────────────────────────────────────────────── */
 /* ofsted1–4 already defined above; these cover the two new framework states */

nextjs-app/components/SecondarySchoolRow.module.css

@@ -128,7 +128,7 @@
 }
 
 .deltaPositive { color: var(--status-above); }
-.deltaNegative { color: var(--brand); }
+.deltaNegative { color: var(--status-below); }
 
 /* Line 4: location + distance */
 .line4 {
@@ -207,7 +207,7 @@
 .ofsted1 { background: var(--status-above-bg); color: var(--status-above); }
 .ofsted2 { background: rgba(var(--status-above-rgb), 0.12); color: var(--status-above); }
 .ofsted3 { background: var(--status-below-bg); color: var(--status-below); }
-.ofsted4 { background: var(--brand-bg); color: var(--brand); }
+.ofsted4 { background: var(--status-below); color: var(--text-inverse); }
 
 /* ── Ofsted badge variants ──────────────────────────────────────────────── */
 .ofstedRc      { background: var(--phase-secondary-text); color: var(--text-inverse); }

nextjs-app/components/compare/compareSections.module.css

@@ -123,8 +123,8 @@
 }
 
 .chipBad {
-  background: var(--brand-bg);
-  color: var(--brand-strong);
+  background: var(--status-below-bg);
+  color: var(--status-below);
 }
 
 .chipNeutral {
@@ -151,8 +151,8 @@
 }
 
 .badgeBad {
-  background: var(--brand-bg);
-  color: var(--brand-strong);
+  background: var(--status-below-bg);
+  color: var(--status-below);
 }
 
 .rcList {

nextjs-app/components/school/schoolSections.module.css

@@ -860,7 +860,7 @@
 }
 
 .progressNegative {
-    color: var(--brand-strong);
+    color: var(--status-below);
     font-weight: 700;
 }
 
@@ -876,8 +876,8 @@
 }
 
 .statusBad {
-    background: var(--brand-bg);
-    color: var(--brand-strong);
+    background: var(--status-below-bg);
+    color: var(--status-below);
 }
 
 /* Charts Section */
@@ -1025,8 +1025,8 @@
     color: var(--status-below);
 }
 .ofstedGrade4 {
-    background: var(--brand-bg);
-    color: var(--brand-strong);
+    background: var(--status-below);
+    color: var(--text-inverse);
 }
 
 /* Report Card grade colours (5-level scale, lower = better) */
@@ -1047,8 +1047,8 @@
     color: var(--status-below);
 } /* Needs attention */
 .rcGrade5 {
-    background: var(--brand-bg);
-    color: var(--brand-strong);
+    background: var(--status-below);
+    color: var(--text-inverse);
 } /* Urgent improvement */
 
 /* Safeguarding value (used inside a standard metricCard) */