feat: add Xtream service for IPTV integration and a lite player HTML file.

lib/features/iptv/services/xtream_service.dart

@@ -37,10 +37,15 @@ class XtreamService {
     return html.window.location.protocol == 'https:';
   }
 
-  /// Wrap URL with proxy if needed (for HTTPS to HTTP bridge)
+  /// Wrap URL with proxy for all external IPTV URLs
+  /// 
+  /// Always use proxy for HTTP URLs to:
+  /// 1. Handle HTTPS->HTTP mixed content
+  /// 2. Provide Range header support for seeking
+  /// 3. Normalize headers and handle redirects
   String _wrapWithProxy(String url) {
-    // If we're on HTTPS and the target URL is HTTP, use the proxy
+    // Always proxy HTTP URLs for consistent streaming behavior
-    if (_isHttps && url.startsWith('http://')) {
+    if (url.startsWith('http://')) {
       final baseUrl = html.window.location.origin;
       return '$baseUrl/api/xtream/$url';
     }

web/player_lite.html

@@ -361,18 +361,11 @@
             log('Stream type: ' + streamType);
             const lowerUrl = streamUrl.toLowerCase();
 
-            // SPECIAL: /api/stream/ endpoint handling - differentiate Live vs VOD
+            // SPECIAL: /api/stream/ endpoint handling - ALWAYS returns JSON with HLS playlist
             if (streamUrl.includes('/api/stream/')) {
-                if (streamType === 'live') {
+                // Both Live TV and VOD use /api/stream/ which returns JSON with HLS playlist URL
-                    // LIVE TV: Use MPEG-TS direct streaming
+                log((streamType === 'live' ? 'Live TV' : 'VOD') + ' via /api/stream/ - fetching HLS...');
-                    log('Live TV via /api/stream/ - using MPEG-TS direct');
+                showLoading(streamType === 'live' ? 'Connecting to live stream...' : 'Initializing stream...');
-                    showLoading('Connecting to live stream...');
-                    await playWithMpegTS(streamUrl, true); // isLive=true
-                    return;
-                } else {
-                    // VOD: Fetch JSON to get HLS playlist URL (transcoding mode)
-                    log('VOD via /api/stream/ - fetching HLS playlist...');
-                    showLoading('Initializing stream (transcoding audio)...');
 
                 try {
                     const response = await fetch(streamUrl);
@@ -394,7 +387,6 @@
                     return;
                 }
             }
-            }
 
             // Use type parameter if available, otherwise detect from URL
             if (streamType === 'vod') {