diff --git a/src/components/Library/LibraryPublicationGrid.tsx b/src/components/Library/LibraryPublicationGrid.tsx
index af1a70ba..e3c67949 100644
--- a/src/components/Library/LibraryPublicationGrid.tsx
+++ b/src/components/Library/LibraryPublicationGrid.tsx
@@ -1,8 +1,10 @@
 import PublicationCard from '@/components/Note/PublicationCard'
 import { Skeleton } from '@/components/ui/skeleton'
+import { libraryPublicationGridColumnClass, usePanelMode } from '@/hooks/usePanelMode'
 import type { LibraryPublicationEntry } from '@/lib/library-publication-index'
 import { isBooklistNip32Label } from '@/lib/nip32-label'
 import { cn } from '@/lib/utils'
+import { useScreenSize } from '@/providers/ScreenSizeProvider'
 import { BookOpen, Highlighter, MessageSquare, Tag } from 'lucide-react'
 import { useTranslation } from 'react-i18next'
 
@@ -95,10 +97,13 @@ export default function LibraryPublicationGrid({
   emptyMessage?: string
 }) {
   const { t } = useTranslation()
+  const { isSmallScreen } = useScreenSize()
+  const panelMode = usePanelMode()
+  const gridCols = libraryPublicationGridColumnClass(isSmallScreen, panelMode)
 
   if (loading) {
     return (
-      <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 xl:grid-cols-3">
+      <div className={cn('grid gap-4', gridCols)}>
         {Array.from({ length: 6 }).map((_, i) => (
           <Skeleton key={i} className="h-48 w-full rounded-lg" />
         ))}
@@ -115,7 +120,7 @@ export default function LibraryPublicationGrid({
   }
 
   return (
-    <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 xl:grid-cols-3">
+    <div className={cn('grid gap-4', gridCols)}>
       {entries.map((entry) => (
         <div
           key={entry.event.id}
diff --git a/src/hooks/usePanelMode.test.ts b/src/hooks/usePanelMode.test.ts
new file mode 100644
index 00000000..2db871a5
--- /dev/null
+++ b/src/hooks/usePanelMode.test.ts
@@ -0,0 +1,17 @@
+import { describe, expect, it } from 'vitest'
+import { libraryPublicationGridColumnClass } from '@/hooks/usePanelMode'
+
+describe('libraryPublicationGridColumnClass', () => {
+  it('uses 1 column on mobile', () => {
+    expect(libraryPublicationGridColumnClass(true, 'single')).toBe('grid-cols-1')
+    expect(libraryPublicationGridColumnClass(true, 'double')).toBe('grid-cols-1')
+  })
+
+  it('uses 2 columns in double-pane desktop', () => {
+    expect(libraryPublicationGridColumnClass(false, 'double')).toBe('grid-cols-2')
+  })
+
+  it('uses 3 columns in single-pane desktop', () => {
+    expect(libraryPublicationGridColumnClass(false, 'single')).toBe('grid-cols-3')
+  })
+})
diff --git a/src/hooks/usePanelMode.ts b/src/hooks/usePanelMode.ts
new file mode 100644
index 00000000..e54d2c0f
--- /dev/null
+++ b/src/hooks/usePanelMode.ts
@@ -0,0 +1,26 @@
+import storage from '@/services/local-storage.service'
+import { useEffect, useState } from 'react'
+
+export function usePanelMode(): 'single' | 'double' {
+  const [panelMode, setPanelMode] = useState<'single' | 'double'>(() => storage.getPanelMode())
+
+  useEffect(() => {
+    const onPanelMode = (ev: Event) => {
+      const mode = (ev as CustomEvent<{ mode: 'single' | 'double' }>).detail?.mode
+      if (mode === 'single' || mode === 'double') setPanelMode(mode)
+    }
+    window.addEventListener('panelModeChanged', onPanelMode)
+    return () => window.removeEventListener('panelModeChanged', onPanelMode)
+  }, [])
+
+  return panelMode
+}
+
+export function libraryPublicationGridColumnClass(
+  isSmallScreen: boolean,
+  panelMode: 'single' | 'double'
+): string {
+  if (isSmallScreen) return 'grid-cols-1'
+  if (panelMode === 'double') return 'grid-cols-2'
+  return 'grid-cols-3'
+}
diff --git a/src/lib/library-publication-index.test.ts b/src/lib/library-publication-index.test.ts
index 30dc9f69..00675a66 100644
--- a/src/lib/library-publication-index.test.ts
+++ b/src/lib/library-publication-index.test.ts
@@ -253,6 +253,34 @@ describe('library-publication-index', () => {
     expect(picked.every((e) => e.engagementCount === 0)).toBe(true)
   })
 
+  it('pickLibraryPublicationEntries merges engaged roots with recent feed', () => {
+    const engagedRoot = indexEvent('engaged', [`30041:${PK}:a`], '1'.repeat(64))
+    engagedRoot.created_at = 5
+    const recentRoots = Array.from({ length: 5 }, (_, i) => {
+      const ev = indexEvent(`recent-${i}`, [`30041:${PK}:r-${i}`], String(i + 2).padEnd(64, '0').slice(0, 64))
+      ev.created_at = 100 + i
+      return ev
+    })
+    const roots = [engagedRoot, ...recentRoots]
+    const indexByAddress = buildIndexByAddress(roots)
+    const label: Event = {
+      id: '4'.repeat(64),
+      kind: ExtendedKind.LABEL,
+      pubkey: 'f'.repeat(64),
+      created_at: 50,
+      content: '',
+      tags: [['L', 'ugc'], ['l', 'booklist', 'ugc'], ['e', engagedRoot.id]],
+      sig: 'e'.repeat(128)
+    }
+    const engagement = buildEngagementMapsFromEvents([label], [], [])
+
+    const picked = pickLibraryPublicationEntries(roots, indexByAddress, engagement)
+
+    expect(picked.length).toBeGreaterThan(1)
+    expect(picked.some((e) => e.event.id === engagedRoot.id && e.hasBooklistLabel)).toBe(true)
+    expect(picked.some((e) => e.event.id === recentRoots[4].id)).toBe(true)
+  })
+
   it('buildRecentPublicationEntries caps at limit', () => {
     const roots = Array.from({ length: 12 }, (_, i) => {
       const ev = indexEvent(`book-${i}`, [`30041:${PK}:ch-${i}`], String(i).padEnd(64, '0').slice(0, 64))
diff --git a/src/lib/library-publication-index.ts b/src/lib/library-publication-index.ts
index ff5ba5f5..f30dfa57 100644
--- a/src/lib/library-publication-index.ts
+++ b/src/lib/library-publication-index.ts
@@ -700,18 +700,30 @@ export function buildRecentPublicationEntries(
     .map((event) => buildLibraryPublicationEntry(event, indexByAddress, engagement))
 }
 
-/** Engaged publications first; when none match, show the newest top-level indexes (still enriched). */
+/** Engaged publications first, then fill with newest top-level indexes up to {@link LIBRARY_RECENT_FALLBACK_LIMIT}. */
 export function pickLibraryPublicationEntries(
   roots: Event[],
   indexByAddress: Map<string, Event>,
   engagement: PublicationEngagementMaps
 ): LibraryPublicationEntry[] {
-  const enriched = getTopLevelIndexEvents(roots).map((root) =>
-    buildLibraryPublicationEntry(root, indexByAddress, engagement)
-  )
-  const engaged = enriched.filter((entry) => entry.hasLabel || entry.hasComment || entry.hasHighlight)
-  if (engaged.length > 0) return sortLibraryPublications(engaged)
-  return sortLibraryPublications(buildRecentPublicationEntries(roots, indexByAddress, engagement))
+  const engaged = filterEngagedPublications(roots, indexByAddress, engagement)
+  const recent = buildRecentPublicationEntries(roots, indexByAddress, engagement)
+  if (engaged.length === 0) return sortLibraryPublications(recent)
+
+  const seen = new Set<string>()
+  const merged: LibraryPublicationEntry[] = []
+  for (const entry of sortLibraryPublications(engaged)) {
+    if (seen.has(entry.event.id)) continue
+    seen.add(entry.event.id)
+    merged.push(entry)
+  }
+  for (const entry of recent) {
+    if (merged.length >= LIBRARY_RECENT_FALLBACK_LIMIT) break
+    if (seen.has(entry.event.id)) continue
+    seen.add(entry.event.id)
+    merged.push(entry)
+  }
+  return merged
 }
 
 export function sortLibraryPublications(entries: LibraryPublicationEntry[]): LibraryPublicationEntry[] {