♻️(frontend) remove unused props and CSS in preview viewers

Remove the unused isSidebarOpen prop from PdfControls and
strip unnecessary position/min-height rules from the video
player that were left over from earlier layout iterations.

src/frontend/apps/drive/src/features/ui/preview/viewers/pdf-preview/PdfControls.tsx

@@ -5,7 +5,6 @@ import { ZoomControls } from "../../components/ZoomControls/ZoomControls";
 interface PdfControlsProps {
   numPages: number;
   pageInputValue: string;
-  isSidebarOpen: boolean;
   onToggleSidebar: () => void;
   onPageInputChange: (e: React.ChangeEvent<HTMLInputElement>) => void;
   onPageInputSubmit: () => void;

src/frontend/apps/drive/src/features/ui/preview/viewers/pdf-preview/PdfPreview.tsx

@@ -171,7 +171,6 @@ export function PdfPreview({
       <PdfControls
         numPages={numPages}
         pageInputValue={pageInputValue}
-        isSidebarOpen={isSidebarOpen}
         onToggleSidebar={toggleSidebar}
         onPageInputChange={handlePageInputChange}
         onPageInputSubmit={handlePageInputSubmit}

src/frontend/apps/drive/src/features/ui/preview/viewers/video-player/VideoPlayer.scss

@@ -1,5 +1,4 @@
 .video-player {
-  position: relative;
   overflow: hidden;
   width: 100%;
   height: 100vh; // Use full available height
@@ -69,7 +68,6 @@
   }
 
   &__controls {
-    position: relative;
     border-top: none;
     padding: 16px 0;
     transition: opacity 0.3s ease;
@@ -78,7 +76,6 @@
     flex-direction: column;
     gap: var(--c--globals--spacings--md);
     flex-shrink: 0; // Prevent controls from shrinking
-    min-height: 120px; // Minimum height for controls
   }
 }
 
@@ -97,7 +94,6 @@
     }
 
     &__controls {
-      min-height: 100px;
       padding: 12px;
     }
   }