polish(school-detail): align hero chips to fixed width, free hero summary

- heroChip: swap ``min-width: 180px; flex: 0 1 auto`` for
  ``flex: 0 0 240px`` so every chip in the strip is the same width
  regardless of content. Title gets nowrap + ellipsis as insurance
  against accidental overflow.
- heroChipTitle / Sub / Detail: align line-heights (1.3 / 1.4 / 1.4)
  so an OEIF chip (title + sub) and a Report Card chip
  (title + sub + detail) sit on the same vertical rhythm.
- heroSummary: drop the 64ch max-width — the sentence should read at
  the natural hero width.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

nextjs-app/components/SchoolDetailView.module.css

@@ -728,8 +728,7 @@
 }
 
 .heroChip {
-  min-width: 180px;
-  flex: 0 1 auto;
+  flex: 0 0 240px;
   padding: 0.75rem 1rem;
   border-radius: 8px;
   border-left: 3px solid var(--border-color, #e5dfd5);
@@ -743,19 +742,23 @@
 .heroChipTitle {
   font-size: 0.9375rem;
   font-weight: 700;
-  line-height: 1.25;
+  line-height: 1.3;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
 }
 
 .heroChipSub {
   font-size: 0.75rem;
   color: var(--text-secondary, #5c564d);
-  line-height: 1.35;
+  line-height: 1.4;
 }
 
 .heroChipDetail {
   font-size: 0.75rem;
   font-weight: 600;
-  margin-top: 0.15rem;
+  line-height: 1.4;
+  margin-top: 0.1rem;
 }
 
 /* Hero tone scheme — independent of the .ofstedGrade{N} / .rcGrade{N} badges
@@ -844,7 +847,6 @@
   font-style: italic;
   line-height: 1.5;
   color: var(--text-primary, #1a1612);
-  max-width: 64ch;
 }
 
 .heroDataNote {