perf: anti micro-stutter buffer optimizations for live TV

lib/core/utils/platform_utils.dart

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+/// Platform utilities - conditional export
+/// Uses web implementation on web, stub on other platforms
+export 'platform_utils_stub.dart'
+    if (dart.library.html) 'platform_utils_web.dart';

lib/core/utils/platform_utils_stub.dart

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+/// Platform-specific utilities for web
+/// This file is used when compiling for web
+
+/// Check if we're running on HTTPS
+bool isHttps() {
+  // Implemented in platform_utils_web.dart
+  return true;
+}
+
+/// Get the current window origin
+String getWindowOrigin() {
+  // Implemented in platform_utils_web.dart
+  return '';
+}

lib/core/utils/platform_utils_web.dart

@@ -0,0 +1,13 @@
+/// Platform-specific utilities for web
+/// This file is used when compiling for web
+import 'dart:html' as html;
+
+/// Check if we're running on HTTPS
+bool isHttps() {
+  return html.window.location.protocol == 'https:';
+}
+
+/// Get the current window origin
+String getWindowOrigin() {
+  return html.window.location.origin;
+}