Make AI image upload section border consistent when locked

Changed the border color of the AI image upload section to always use the blue (#0073aa) border, regardless of whether API keys are configured or PRO features are locked. This makes it clear that this is a distinct section even when the lock overlay is shown.

Previously, the border would change to light gray (#ddd) when locked, making the section boundary unclear.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: vytisbulkevicius

classes/Visualizer/Render/Page/Types.php

@@ -74,7 +74,7 @@ protected function _renderContent() {
 
 		echo '<div class="' . $wrapper_class . '">';
 		echo '<div style="position: relative;">';
-		echo '<div id="ai-chart-from-image" style="background: #f8f9fa; border: 2px dashed ' . ( ! $show_api_lock && ! $show_pro_lock ? '#0073aa' : '#ddd' ) . '; border-radius: 8px; padding: 20px; margin-bottom: 25px;">';
+		echo '<div id="ai-chart-from-image" style="background: #f8f9fa; border: 2px dashed #0073aa; border-radius: 8px; padding: 20px; margin-bottom: 25px;">';
 
 		if ( $show_api_lock ) {
 			// Show API key configuration lock (for PRO users without API keys)