fix: resolve all compile errors from Stitch theme merge

- Add missing AppTheme animation constants (durationSm/Md/Lg/Xl, curveSmooth)
  to satisfy remote widget references.
- Replace deprecated GlassContainer(opacity:) with .glass()/.floating()/.base()
  in login_screen, live_tv_tab, mobile_live_tv_tab, player_screen,
  dashboard_screen.
- Fix const-eval errors by removing const from BorderSide/Text/BoxDecoration
  using AppColors.focusColor and AppColors.border (runtime getters).
- Fix subtitle_service.dart: padEnd → padRight (Dart String API).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

lib/core/theme/app_theme.dart

@@ -31,7 +31,12 @@ class AppTheme {
   // ============ ANIMATION ============
   static const Duration durationFast = Duration(milliseconds: 200);
   static const Duration durationNormal = Duration(milliseconds: 300);
+  static const Duration durationSm = Duration(milliseconds: 200);
+  static const Duration durationMd = Duration(milliseconds: 300);
+  static const Duration durationLg = Duration(milliseconds: 400);
+  static const Duration durationXl = Duration(milliseconds: 500);
   static const Curve curveDefault = Curves.fastOutSlowIn;
+  static const Curve curveSmooth = Curves.fastOutSlowIn;
 
   // ============ TYPOGRAPHY HELPERS ============
   static TextStyle _spaceGrotesk({

lib/features/admin/screens/admin_panel.dart

@@ -558,7 +558,7 @@ class _UsersTab extends ConsumerWidget {
                                             .withOpacity(0.2),
                                         borderRadius: BorderRadius.circular(50),
                                       ),
-                                      child: const Text(
+                                      child: Text(
                                         'ADMIN',
                                         style: TextStyle(
                                           fontSize: 10,

lib/features/auth/screens/login_screen.dart

@@ -163,11 +163,10 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
                   const SizedBox(height: 48),
 
                   // Login Form Container
-                  GlassContainer(
+                  GlassContainer.floating(
                     width: 500,
                     padding: const EdgeInsets.all(48), // Spacious padding
                     borderRadius: 24,
-                    opacity: 0.7,
                     child: Form(
                       key: _formKey,
                       child: Column(
@@ -332,7 +331,7 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
         ),
         focusedBorder: OutlineInputBorder(
           borderRadius: BorderRadius.circular(12),
-          borderSide: const BorderSide(color: AppColors.focusColor, width: 2),
+          borderSide: BorderSide(color: AppColors.focusColor, width: 2),
         ),
         contentPadding:
             const EdgeInsets.symmetric(horizontal: 20, vertical: 20),

lib/features/iptv/services/subtitle_service.dart

@@ -170,7 +170,7 @@ class SubtitleService {
     final minutes = int.parse(parts[1]);
     final secondsParts = parts[2].split('.');
     final seconds = int.parse(secondsParts[0]);
-    final milliseconds = int.parse(secondsParts[1].padEnd(3, '0'));
+    final milliseconds = int.parse(secondsParts[1].padRight(3, '0'));
 
     return Duration(
       hours: hours,

lib/features/iptv/widgets/live_tv_tab.dart

@@ -99,9 +99,8 @@ class _LiveTVTabState extends ConsumerState<LiveTVTab>
               // HEADER (Glass)
               Padding(
                 padding: const EdgeInsets.fromLTRB(24, 16, 24, 16),
-                child: GlassContainer(
+                child: GlassContainer.glass(
                   borderRadius: 16,
-                  opacity: 0.6,
                   padding:
                       const EdgeInsets.symmetric(horizontal: 20, vertical: 12),
                   child: Row(
@@ -288,9 +287,8 @@ class _LiveTVTabState extends ConsumerState<LiveTVTab>
             });
           },
           borderRadius: 16,
-          child: GlassContainer(
+          child: GlassContainer.base(
             borderRadius: 16,
-            opacity: 0.2, // Darker glass
             padding: const EdgeInsets.all(0),
             child: Stack(
               children: [

lib/mobile/features/iptv/widgets/mobile_live_tv_tab.dart

@@ -144,9 +144,8 @@ class _MobileLiveTVTabState extends ConsumerState<MobileLiveTVTab> {
                 // Header & Search
                 Padding(
                   padding: const EdgeInsets.all(16),
-                  child: GlassContainer(
+                  child: GlassContainer.glass(
                     borderRadius: 16,
-                    opacity: 0.1,
                     padding:
                         const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
                     child: Row(
@@ -352,9 +351,8 @@ class _MobileChannelTile extends StatelessWidget {
             ? '/api/xtream/${channel.streamIcon}'
             : null;
 
-    return GlassContainer(
+    return GlassContainer.glass(
       borderRadius: 12,
-      opacity: 0.15,
       padding: EdgeInsets.zero,
       child: InkWell(
         onTap: onTap,

lib/mobile/widgets/mobile_scaffold.dart

@@ -42,7 +42,7 @@ class MobileScaffold extends ConsumerWidget {
         ],
       ),
       bottomNavigationBar: Container(
-        decoration: const BoxDecoration(
+        decoration: BoxDecoration(
           color: AppColors.surface,
           border: Border(
             top: BorderSide(