feat: adds keyboard accessibility to tabs

CODE_GUIDELINES.md

@@ -2775,6 +2775,10 @@ Building accessible applications ensures that all users, including those with di
 <div phx-click="action">Click me</div>
 ```
 
+**Tables (Core Component `<.table>` with `row_click`):**
+
+- When `row_click` is set, the first column that does not use `col_click` gets `tabindex="0"` and `role="button"` so each row is reachable via Tab. The `TableRowKeydown` hook triggers the row action on Enter and Space (WCAG 2.1.1). Use `row_id` and `row_tooltip` for all clickable tables (e.g. Groups, Users, Roles, Members, Custom Fields, Member Fields) so the table is fully keyboard accessible.
+
 **Tab Order:**
 
 - Ensure logical tab order matches visual order