Refine hero: gradient backdrop, intro inside hero, image on right, vector visible

- styles/blocks/page-hero.css: add blue-to-teal gradient to .page-hero (matches
  homepage-hero). Fix image mask direction (right-to-left fade) so the image
  is visible on the right and fades to transparent on the left. Reposition
  the vector to span the full bottom of the hero at z-index 2 (above the
  media layer, below content). Add .page-hero__intro and .page-hero__intro-inner
  grid rules for the new two-column heading + body block.
- views/partials/page-hero.php: drop bg-dark / bg-cover / bg-no-repeat
  utilities (the gradient comes from CSS now). Simplify the heading render.
  Load the page-intro partial inside .page-hero__content, below the heading.
- views/partials/page-intro.php: rewrite as a fragment for embedding inside
  the hero - a two-column heading (hard-coded 'Our Work') + body grid.
  Returns early when the intro field is empty.
- page.php: remove the page-intro partial call (it's now loaded from
  page-hero.php).
- tests/inner-page.spec.js: switch the selector from .page-intro to
  .page-hero__intro. Update the order assertions to verify the intro is
  a descendant of the hero (not a sibling below it).

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

page.php

@@ -22,12 +22,6 @@ if ( hasSidebar() ) {
 ?>
 
 <article class="<?php echo esc_attr( $classes ); ?>">
-	<?php
-	// Centered intro section between the hero and the body content.
-	if ( get_field( 'intro' ) ) {
-		get_template_part( 'views/partials/page-intro' );
-	}
-	?>
 	<div class="entry-content <?php echo esc_attr( $clsEntry ); ?>">
 		<?php
 		// Page body content