fix(rankings): long metric labels wrap instead of widening the table

Table auto-layout sizes columns by unwrapped header text, so labels like
'Reading, Writing & Maths Combined Higher %' pushed the value column —
and the table — past the viewport. The label now renders inside a block
span capped at 110px (84px on phones), forcing multiline and keeping the
table fully in view at any metric.

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

nextjs-app/components/RankingsView.tsx

@@ -233,7 +233,11 @@ export function RankingsView({
                   <th className={styles.schoolHeader}>School</th>
                   <th className={styles.areaHeader}>Area</th>
                   <th className={styles.typeHeader}>Type</th>
-                  <th className={styles.valueHeader}>{metricLabel}</th>
+                  <th className={styles.valueHeader}>
+                    {/* Inner block caps the column's measured width so long
+                        labels wrap instead of widening the table off-screen. */}
+                    <span className={styles.valueHeaderText}>{metricLabel}</span>
+                  </th>
                   <th className={styles.actionHeader}>Action</th>
                 </tr>
               </thead>