feat: show search button on chapter reader pages

ui/src/routes/+layout.svelte

@@ -570,8 +570,7 @@
 		</a>
 		{/if}
 			<div class="ml-auto flex items-center gap-2">
-				<!-- Universal search button (hidden on chapter/reader pages) -->
-				{#if !/\/books\/[^/]+\/chapters\//.test(page.url.pathname)}
+				<!-- Universal search button -->
 				<button
 					type="button"
 					onclick={() => { searchOpen = true; userMenuOpen = false; langMenuOpen = false; themeMenuOpen = false; menuOpen = false; notificationsOpen = false; }}
@@ -583,7 +582,6 @@
 						<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z"/>
 					</svg>
 				</button>
-				{/if}
 
 			<!-- Notifications bell -->
 			{#if data.user}
@@ -1168,8 +1166,6 @@
 	// Don't intercept when typing in an input/textarea
 	const tag = (e.target as HTMLElement).tagName;
 	if (tag === 'INPUT' || tag === 'TEXTAREA' || (e.target as HTMLElement).isContentEditable) return;
-	// Don't open on chapter reader pages
-	if (/\/books\/[^/]+\/chapters\//.test(page.url.pathname)) return;
 	if (searchOpen) return;
 	// `/` key or Cmd/Ctrl+K
 	if (e.key === '/' || ((e.metaKey || e.ctrlKey) && e.key === 'k')) {