feat(frontend): add dark mode option (#34)

Resolves #32

Reviewed-on: #34

frontend/src/pages/ClipEdit.tsx

@@ -135,7 +135,7 @@ const ClipEdit = () => {
             <video
                 ref={videoRef}
                 src={videoUrl}
-                className={"w-full rounded-lg shadow-sm bg-text-primary"}
+                className={"w-full rounded-lg shadow-sm bg-media-backdrop"}
                 onLoadedMetadata={handleVideoMetadataLoaded}
             />
 

frontend/src/pages/MediaPlayer.tsx

@@ -233,7 +233,7 @@ const MediaPlayer = ({ noun, getMediaUrl, fetchDetails }: MediaPlayerProps) => {
             {/* Player */}
             <div
                 ref={containerRef}
-                className="relative bg-text-primary rounded-xl overflow-hidden flex-1 min-h-0 select-none"
+                className="relative bg-media-backdrop rounded-xl overflow-hidden flex-1 min-h-0 select-none"
                 onMouseMove={showControls}
                 onMouseLeave={() => isPlaying && setControlsVisible(false)}
                 onClick={togglePlay}