fix(diff,deploy): highlight stack names and contexts in output messages

Add highlighting to stack names and contexts in all user-facing output
statements for better visual distinction.

Changes:
- Add Highlight() helper function to diff package (currently cyan)
- Update diff command output statements to highlight stack name and context
- Update deploy command output statements (success, cancellation, no changes)
- Highlight context names in 'No stacks found' messages

The generic function name allows easy color changes in the future by
modifying only the Highlight() implementation.

Affected messages:
- 'Changes detected for stack X in context Y'
- 'No changes detected for stack X in context Y'
- 'Successfully deployed stack X in context Y'
- 'Stack X create/update completed successfully'
- 'Stack creation/deployment cancelled for X'
- 'No infrastructure changes for stack X'
- 'No stacks found in context X'

Author: orien

cmd/diff.go

@@ -99,9 +99,11 @@ func diffSingleStack(ctx context.Context, stackName, contextName, configFile str
 	// Set exit code based on whether changes were found
 	if result.HasChanges() {
 		// Exit with code 1 if changes detected (similar to git diff)
-		fmt.Printf("\nChanges detected for stack %s in context %s\n", stackName, contextName)
+		fmt.Printf("\nChanges detected for stack %s in context %s\n",
+			diff.Highlight(stackName), diff.Highlight(contextName))
 	} else {
-		fmt.Printf("\nNo changes detected for stack %s in context %s\n", stackName, contextName)
+		fmt.Printf("\nNo changes detected for stack %s in context %s\n",
+			diff.Highlight(stackName), diff.Highlight(contextName))
 	}
 
 	return nil

internal/aws/cloudformation.go

@@ -814,7 +814,7 @@ func isChangeSetNoChangesMessage(statusReason string) bool {
 		"no updates are to be performed",
 		"no updates to be performed",
 	}
-	
+
 	lowerReason := strings.ToLower(statusReason)
 	for _, phrase := range noChangePhrases {
 		if strings.Contains(lowerReason, phrase) {

internal/deploy/deployer.go

@@ -128,7 +128,7 @@ func (d *StackDeployer) deployNewStack(ctx context.Context, stack *model.Stack,
 		return fmt.Errorf("failed to get user confirmation: %w", err)
 	}
 	if !confirmed {
-		fmt.Printf("\nStack creation cancelled for %s\n", stack.Name)
+		fmt.Printf("\nStack creation cancelled for %s\n", diff.Highlight(stack.Name))
 		return CancellationError{StackName: stack.Name}
 	}
 
@@ -175,7 +175,7 @@ func (d *StackDeployer) deployNewStack(ctx context.Context, stack *model.Stack,
 		return fmt.Errorf("failed to create stack: %w", err)
 	}
 
-	fmt.Printf("Stack %s create completed successfully\n", stack.Name)
+	fmt.Printf("Stack %s create completed successfully\n", diff.Highlight(stack.Name))
 	return nil
 }
 
@@ -202,15 +202,15 @@ func (d *StackDeployer) deployWithChangeSet(ctx context.Context, stack *model.St
 		var noChangesErr aws.NoChangesError
 		if errors.As(diffResult.ChangeSetError, &noChangesErr) {
 			// Treat metadata-only changes the same as no changes - no deployment needed
-			fmt.Printf("No infrastructure changes for stack %s (metadata-only changes detected)\n", stack.Name)
+			fmt.Printf("No infrastructure changes for stack %s (metadata-only changes detected)\n", diff.Highlight(stack.Name))
 			return NoChangesError{StackName: stack.Name}
 		}
 		return fmt.Errorf("cannot deploy: changeset generation failed: %w", diffResult.ChangeSetError)
 	}
 
 	// Check for changes
 	if !diffResult.HasChanges() {
-		fmt.Printf("No changes detected for stack %s\n", stack.Name)
+		fmt.Printf("No changes detected for stack %s\n", diff.Highlight(stack.Name))
 		return NoChangesError{StackName: stack.Name}
 	}
 
@@ -229,7 +229,7 @@ func (d *StackDeployer) deployWithChangeSet(ctx context.Context, stack *model.St
 		if diffResult.ChangeSet != nil {
 			_ = cfnOps.DeleteChangeSet(ctx, diffResult.ChangeSet.ChangeSetID)
 		}
-		fmt.Printf("\nDeployment cancelled for stack %s\n", stack.Name)
+		fmt.Printf("\nDeployment cancelled for stack %s\n", diff.Highlight(stack.Name))
 		return CancellationError{StackName: stack.Name}
 	}
 
@@ -272,7 +272,7 @@ func (d *StackDeployer) deployWithChangeSet(ctx context.Context, stack *model.St
 	// Clean up changeset after successful deployment
 	_ = cfnOps.DeleteChangeSet(ctx, changeSetInfo.ChangeSetID)
 
-	fmt.Printf("Stack %s update completed successfully\n", stack.Name)
+	fmt.Printf("Stack %s update completed successfully\n", diff.Highlight(stack.Name))
 	return nil
 }
 
@@ -332,7 +332,7 @@ func (d *StackDeployer) deployStackWithFeedback(ctx context.Context, stack *mode
 		return fmt.Errorf("error deploying stack %s: %w", stack.Name, err)
 	}
 
-	fmt.Printf("Successfully deployed stack %s in context %s\n", stack.Name, contextName)
+	fmt.Printf("Successfully deployed stack %s in context %s\n", diff.Highlight(stack.Name), diff.Highlight(contextName))
 	return nil
 }
 
@@ -355,7 +355,7 @@ func (d *StackDeployer) DeployAllStacks(ctx context.Context, contextName string)
 		return fmt.Errorf("failed to get stacks for context %s: %w", contextName, err)
 	}
 	if len(stackNames) == 0 {
-		fmt.Printf("No stacks found in context %s\n", contextName)
+		fmt.Printf("No stacks found in context %s\n", diff.Highlight(contextName))
 		return nil
 	}
 

internal/diff/styles.go

@@ -341,3 +341,11 @@ func ShouldUseColour() bool {
 	// Check if it's a character device (terminal)
 	return (fileInfo.Mode() & os.ModeCharDevice) != 0
 }
+
+// Highlight returns the text highlighted in the accent color if colours are enabled
+func Highlight(text string) string {
+	if !ShouldUseColour() {
+		return text
+	}
+	return lipgloss.NewStyle().Foreground(lipgloss.Color("14")).Render(text)
+}