feat: Add series TV support with Vidzy HLS downloads and duplicate prevention

Major improvements:
- Series TV support via FS7 provider with dedicated search endpoint
- Vidzy downloader now uses Playwright for JS obfuscation and ffmpeg for HLS streams
- Episode filenames properly named (Series Title - Episode X) instead of master.m3u8.mp4
- Duplicate download prevention: checks existing tasks before creating new ones
- Removed host preference system in favor of intelligent URL-based detection

Technical changes:
- Vidzy: Added Playwright extraction and M3U8→MP4 conversion with ffmpeg
- FS7: Episodes now use pipe format (video_url|series_url|episode_title)
- DownloadManager: Extract target_filename from pipe URL and prevent duplicates
- UI: New Series tab with search, recommendations, and releases sections
- Anime-Sama: Removed hardcoded host preferences, uses site's URL order

Generated with [Claude Code](https://claude.com/claude-code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

static/js/recommendations.js

@@ -253,20 +253,20 @@ function getRatingColor(score) {
     return 'linear-gradient(45deg, #666, #888)';
 }
 
-// Search anime on providers (redirects to search tab)
+// Search anime on providers (redirects to anime tab)
 function searchAnimeOnProviders(title) {
-    // Switch to search tab
-    switchTab('search');
+    // Switch to anime tab
+    switchTab('anime');
 
     // Fill search input
-    const searchInput = document.getElementById('searchInput');
+    const searchInput = document.getElementById('animeSearchInput');
     if (searchInput) {
         searchInput.value = title;
 
         // Trigger search
         setTimeout(() => {
-            if (typeof searchAnime === 'function') {
-                searchAnime();
+            if (typeof handleAnimeSearch === 'function') {
+                handleAnimeSearch();
             }
         }, 300);
     }