do to formatters

apps/website/lib/formatters/FinishFormatter.ts

@@ -0,0 +1,24 @@
+/**
+ * FinishDisplay
+ * 
+ * Deterministic formatting for race finish positions.
+ */
+
+export class FinishFormatter {
+  /**
+   * Formats a finish position as "P1", "P2", etc.
+   */
+  static format(position: number | null | undefined): string {
+    if (position === null || position === undefined) return '—';
+    return `P${position.toFixed(0)}`;
+  }
+
+  /**
+   * Formats an average finish position with one decimal place.
+   * Example: 5.4 -> "P5.4"
+   */
+  static formatAverage(avg: number | null | undefined): string {
+    if (avg === null || avg === undefined) return '—';
+    return `P${avg.toFixed(1)}`;
+  }
+}