Add trending videos page with YouTube-style algorithm

- Trending algorithm based on:
  - Recent views (last 48h): 70% weight
  - View velocity (views/hour): 15% weight
  - Recency bonus: 10% weight
  - Like count: 5% weight
- Excludes videos older than 10 days
- Filter options: Today/This Week/This Month
- Added route, controller method, and view
- Updated nav to link to trending page

app/Models/Video.php

@@ -186,3 +186,68 @@ class Video extends Model
         return $this->comments()->count();
     }
 }
+
+    // Get recent views count (within hours)
+    public function getRecentViews( = 48)
+    {
+        return \DB::table('video_views')
+            ->where('video_id', ->id)
+            ->where('watched_at', '>=', now()->subHours())
+            ->count();
+    }
+
+    // Get views in last 24 hours (for velocity calculation)
+    public function getViewsLast24Hours()
+    {
+        return ->getRecentViews(24);
+    }
+
+    // Calculate trending score (YouTube-style algorithm)
+    public function getTrendingScore( = 48)
+    {
+         = ->getRecentViews();
+        
+        // Don't include videos older than 10 days
+        if (->created_at->diffInDays(now()) > 10) {
+            return 0;
+        }
+        
+        // Don't include videos with no recent views
+        if ( < 5) {
+            return 0;
+        }
+        
+        // Calculate view velocity (views per hour in last 48 hours)
+         =  / ;
+        
+        // Recency bonus: newer videos get a boost
+         = ->created_at->diffInHours(now());
+         = max(0, 1 - ( / 240)); // Decreases over 10 days
+        
+        // Like count bonus
+         = ->like_count * 0.1;
+        
+        // Calculate final score
+        // Weight: 70% recent views, 15% velocity, 10% recency, 5% likes
+         = ( * 0.70) + 
+                 ( * 100 * 0.15) + 
+                 ( * 50 * 0.10) + 
+                 ( * 0.05);
+        
+        return round(, 2);
+    }
+
+    // Scope for trending videos
+    public function scopeTrending(,  = 48,  = 50)
+    {
+        return ->public()
+            ->where('status', 'ready')
+            ->where('created_at', '>=', now()->subDays(10))
+            ->orderByDesc(\DB::raw('(
+                (SELECT COUNT(*) FROM video_views vv WHERE vv.video_id = videos.id AND vv.watched_at >= DATE_SUB(NOW(), INTERVAL ' .  . ' HOUR)) * 0.70 +
+                (SELECT COUNT(*) FROM video_views vv WHERE vv.video_id = videos.id AND vv.watched_at >= DATE_SUB(NOW(), INTERVAL ' .  . ' HOUR)) / ' .  . ' * 100 * 0.15 +
+                GREATEST(0, 1 - TIMESTAMPDIFF(HOUR, videos.created_at, NOW()) / 240) * 50 * 0.10 +
+                (SELECT COUNT(*) FROM video_likes vl WHERE vl.video_id = videos.id) * 0.1 * 0.05
+            )'))
+            ->limit();
+    }