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

resources/views/layouts/app.blade.php

@@ -415,7 +415,7 @@
     
     <!-- Mobile Search Overlay -->
     <div class="mobile-search-overlay" id="mobileSearchOverlay">
-        <form action="{{ route('videos.search') }}" method="GET" class="mobile-search-form">
+        <form action="{{ route('videos.trending') }}" method="GET" class="mobile-search-form">
             <input type="text" name="q" class="mobile-search-input" placeholder="Search" value="{{ request('q') }}">
             <button type="submit" class="mobile-search-submit">
                 <i class="bi bi-search"></i>
@@ -494,7 +494,7 @@
             <i class="bi bi-house-door-fill"></i>
             <span>Home</span>
         </a>
-        <a href="{{ route('videos.search') }}" class="yt-bottom-nav-item {{ request()->routeIs('videos.search') ? 'active' : '' }}">
+        <a href="{{ route('videos.trending') }}" class="yt-bottom-nav-item {{ request()->routeIs('videos.trending') ? 'active' : '' }}">
             <i class="bi bi-fire"></i>
             <span>Trending</span>
         </a>