Add leaderboard route with participants, and configure Shell brand colors in Tailwind

src/app/Models/Participant.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Participant extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'name',
+        'car_number',
+        'time_ms',
+        'status',
+    ];
+
+    protected $casts = [
+        'car_number' => 'integer',
+        'time_ms' => 'integer',
+    ];
+
+    /**
+     * Format time_ms as mm:ss.ms (e.g., 01:23.456)
+     */
+    public function getFormattedTimeAttribute(): ?string
+    {
+        if ($this->time_ms === null) {
+            return null;
+        }
+
+        $totalMs = $this->time_ms;
+        $minutes = floor($totalMs / 60000);
+        $seconds = floor(($totalMs % 60000) / 1000);
+        $milliseconds = $totalMs % 1000;
+
+        return sprintf('%02d:%02d.%03d', $minutes, $seconds, $milliseconds);
+    }
+
+    /**
+     * Scope to get ranked participants (fastest first, null times last)
+     */
+    public function scopeRanked($query)
+    {
+        return $query->orderByRaw('CASE WHEN time_ms IS NULL THEN 1 ELSE 0 END')
+                     ->orderBy('time_ms', 'asc');
+    }
+
+    /**
+     * Scope to get only completed participants
+     */
+    public function scopeCompleted($query)
+    {
+        return $query->where('status', 'completed');
+    }
+}