enhance: add comprehensive Windows CI diagnostics

- Add detailed progress output to identify where Windows tests are failing
- Enhanced error reporting in test_legend_comprehensive
- Added step-by-step diagnostic output in test_streamplot
- Remove problematic getcwd() call that may not be available on Windows

This will help identify the specific failure point in Windows CI tests.

Author: krystophny

test/test_legend_comprehensive.f90

@@ -13,6 +13,7 @@ program test_legend_comprehensive
     print *, "========================================="
     print *, "COMPREHENSIVE LEGEND FUNCTIONALITY TEST"
     print *, "========================================="
+    print *, "Platform: Windows compatibility mode with enhanced error handling"
 
     call test_basic_legend(num_failures)
     call test_legend_positions(num_failures)
@@ -46,13 +47,23 @@ subroutine test_basic_legend(failures)
         y1 = x**2
         y2 = 2.0_wp * x + 5.0_wp
 
+        ! Enhanced error handling for Windows compatibility
+        print *, "  Creating figure with size [640x480]..."
         call figure(figsize=[640.0_wp, 480.0_wp])
+        
+        print *, "  Setting title and labels..."
         call title("Basic Legend Test")
         call xlabel("X")
         call ylabel("Y")
+        
+        print *, "  Adding plots with labels..."
         call add_plot(x, y1, label="Quadratic: x²")
         call add_plot(x, y2, label="Linear: 2x+5")
+        
+        print *, "  Adding legend..."
         call legend()
+        
+        print *, "  Saving to PNG file..."
         call savefig('test_legend_basic.png')
 
         ! Windows-compatible: Allow time for file system operations
@@ -264,5 +275,6 @@ subroutine windows_safe_delay(milliseconds)
             if (current_time - start_time >= delay_seconds) exit
         end do
     end subroutine windows_safe_delay
+    
 
 end program test_legend_comprehensive

test/test_streamplot.f90

@@ -3,6 +3,8 @@ program test_streamplot
     use, intrinsic :: iso_fortran_env, only: real64
     implicit none
 
+    print *, "Starting streamplot tests with Windows compatibility..."
+    
     call test_basic_streamplot()
     call test_streamplot_parameters()
     call test_streamplot_grid_validation()
@@ -18,14 +20,19 @@ subroutine test_basic_streamplot()
         real(real64), dimension(5,4) :: u, v
         integer :: i, j
 
+        print *, "Test 1: Basic streamplot initialization"
+        
         do j = 1, 4
             do i = 1, 5
                 u(i,j) = 1.0
                 v(i,j) = 0.0
             end do
         end do
 
+        print *, "  Initializing figure [800x600]..."
         call fig%initialize(800, 600)
+        
+        print *, "  Creating streamplot..."
         call fig%streamplot(x, y, u, v)
 
         if (fig%plot_count == 0) then