Remove duplicate action buttons on discover page

- Remove redundant Skip/Read Now/Like buttons from desktop right panel
- Main action buttons in center area remain visible on both mobile and desktop
- Keyboard shortcuts hint still available at bottom
- Cleaner UI with no repeated functionality

ui/src/routes/discover/+page.svelte

@@ -843,35 +843,6 @@
 						<p class="text-sm text-(--color-muted) leading-relaxed">{cleanSummary(book.summary)}</p>
 					</div>
 				{/if}
-
-				<!-- Action buttons (duplicated for desktop convenience) -->
-				<div class="mt-auto flex flex-col gap-2.5 pt-4 border-t border-(--color-border)">
-					<button type="button" onclick={() => doAction('read_now')} disabled={animating}
-						class="w-full flex items-center justify-center gap-2 py-3 rounded-xl bg-blue-500 text-white font-bold text-sm hover:bg-blue-400 active:scale-95 transition-all disabled:opacity-40 shadow-lg shadow-blue-500/20">
-						<svg class="w-4 h-4" fill="currentColor" viewBox="0 0 24 24"><path d="M8 5v14l11-7z"/></svg>
-						Read Now
-					</button>
-					<div class="flex gap-2">
-						<button type="button" onclick={() => doAction('skip')} disabled={animating}
-							class="flex-1 flex items-center justify-center gap-1.5 py-2.5 rounded-xl bg-red-500/15 border border-red-500/30 text-red-400 text-sm font-semibold hover:bg-red-500/25 active:scale-95 transition-all disabled:opacity-40">
-							<svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-								<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2.5" d="M6 18L18 6M6 6l12 12"/>
-							</svg>
-							Skip
-						</button>
-						<button type="button" onclick={() => doAction('like')} disabled={animating}
-							class="flex-1 flex items-center justify-center gap-1.5 py-2.5 rounded-xl bg-green-500/15 border border-green-500/30 text-green-400 text-sm font-semibold hover:bg-green-500/25 active:scale-95 transition-all disabled:opacity-40">
-							<svg class="w-4 h-4" fill="currentColor" viewBox="0 0 24 24">
-								<path d="M12 21.35l-1.45-1.32C5.4 15.36 2 12.28 2 8.5 2 5.42 4.42 3 7.5 3c1.74 0 3.41.81 4.5 2.09C13.09 3.81 14.76 3 16.5 3 19.58 3 22 5.42 22 8.5c0 3.78-3.4 6.86-8.55 11.54L12 21.35z"/>
-							</svg>
-							Like
-						</button>
-					</div>
-					<button type="button" onclick={() => { showPreview = true; }}
-						class="w-full py-2 rounded-xl text-xs text-(--color-muted) hover:text-(--color-text) hover:bg-(--color-surface-3) transition-colors">
-						More details
-					</button>
-				</div>
 			</div>
 		{:else if deckEmpty}
 			<div class="flex-1 flex flex-col items-center justify-center gap-4 text-center p-8 text-(--color-muted)">