fix(school-detail): rename admissions heading to "Admissions"

"How Hard to Get Into This School" presupposes difficulty, which misleads for the
many undersubscribed primaries (e.g. schools offering places to 100% of
first-choice applicants). Rename to the neutral "Admissions", matching the
secondary page and the section nav label; the demand figures and the
"Oversubscribed" chip convey the difficulty where it applies.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Lh7Js5xSetKNzLVr9ArXLF

nextjs-app/components/SchoolDetailView.tsx

@@ -917,12 +917,12 @@ export function SchoolDetailView({
         </section>
       )}
 
-      {/* How Hard to Get In */}
+      {/* Admissions */}
       {admissions && (
         <section id="admissions" className={styles.card}>
           <div className={styles.admissionsHeader}>
             <h2 className={styles.sectionTitle}>
-              How Hard to Get Into This School{!showAdmissionsTrend && ` (${formatAcademicYear(admissions.year)})`}
+              Admissions{!showAdmissionsTrend && ` (${formatAcademicYear(admissions.year)})`}
             </h2>
             {showAdmissionsTrend && (
               <div className={styles.admissionsSeg} role="group" aria-label="Admissions view">