Refactor UI elements for consistency and clarity

- Updated action buttons across multiple files to use icons (e.g., "Save" to "💾+", "Delete" to "X").
- Replaced "Cancel" button text with a left arrow (←) for a more intuitive navigation experience.
- Removed unnecessary action columns from tables to streamline the interface.
- Enhanced table rows to be clickable for better user interaction, redirecting to relevant management pages.
- Adjusted font sizes and styles in CSS for improved readability and aesthetics.
- Standardized back button functionality to use a left arrow across various pages.

history_manage.php

@@ -101,14 +101,14 @@ $view ='
 <form action="" method="post">
     <div class="content-title responsive-flex-wrap responsive-pad-bot-3">
         <h2 class="responsive-width-100"><?=$page?>'.$history_h2.'</h2>
-        <a href="'.$url .'" class="btn alt mar-right-2">'.$button_cancel.'</a>
+        <a href="'.$url .'" class="btn alt mar-right-2">←</a>
     ';
 
 if ($delete_allowed === 1){
-    $view .= '<input type="submit" name="delete" value="Delete" class="btn red mar-right-2" onclick="return confirm(\'Are you sure you want to delete this history?\')">';
+    $view .= '<input type="submit" name="delete" value="X" class="btn red mar-right-2" onclick="return confirm(\'Are you sure you want to delete this history?\')">';
 }
 if ($update_allowed === 1){
-    $view .= '<input type="submit" name="submit" value="Save" class="btn">';
+    $view .= '<input type="submit" name="submit" value="💾+" class="btn">';
 }
     
 $view .= '</div>';