feat(dees-pdf-viewer): update styles to improve layout with full height and hidden overflow

ts_web/elements/dees-pdf-viewer/styles.ts

@@ -121,6 +121,8 @@ export const viewerStyles = [
       border-right: 1px solid ${cssManager.bdTheme('hsl(214 31% 91%)', 'hsl(217 25% 22%)')};
       display: flex;
       flex-direction: column;
+      height: 100%;
+      overflow: hidden;
     }
 
     .sidebar-header {
@@ -160,6 +162,7 @@ export const viewerStyles = [
     .sidebar-content {
       flex: 1;
       overflow-y: auto;
+      overflow-x: hidden;
       padding: 12px;
       display: block;
       overscroll-behavior: contain;