Some refactors

lib/presentation/workout_session/widgets/session_progress_bar.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:trainhub_flutter/core/theme/app_colors.dart';
 
 class SessionProgressBar extends StatelessWidget {
   final double progress;
@@ -7,10 +8,23 @@ class SessionProgressBar extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return LinearProgressIndicator(
-      value: progress,
-      minHeight: 8,
-      backgroundColor: Theme.of(context).colorScheme.surfaceContainerHighest,
+    return Container(
+      height: 4,
+      color: AppColors.zinc800,
+      child: FractionallySizedBox(
+        alignment: Alignment.centerLeft,
+        widthFactor: progress.clamp(0.0, 1.0),
+        child: Container(
+          decoration: BoxDecoration(
+            gradient: LinearGradient(
+              colors: [
+                AppColors.accent,
+                AppColors.accent.withValues(alpha: 0.7),
+              ],
+            ),
+          ),
+        ),
+      ),
     );
   }
 }