diff --git a/src/lib/core/discord.ts b/src/lib/core/discord.ts
index 8c98842..b7d2165 100644
--- a/src/lib/core/discord.ts
+++ b/src/lib/core/discord.ts
@@ -1,4 +1,5 @@
 import { platformService } from '$lib/platform-service'
+import { settingsState }   from '$lib/state/settings.svelte'
 import type { Manga }      from '$lib/types/manga'
 import type { Chapter }    from '$lib/types/chapter'
 
@@ -9,11 +10,8 @@ const APP_BUTTONS = [
 
 const FALLBACK_IMAGE = 'moku_logo'
 
-let sessionStart: number | null = null
-
-function isPublicUrl(url: string | null | undefined): boolean {
-  return typeof url === 'string' && url.startsWith('https://')
-}
+let sessionStart:  number | null = null
+let activeMangaId: number | null = null
 
 function trunc(s: string, max = 128): string {
   return s.length <= max ? s : `${s.slice(0, max - 1)}…`
@@ -24,6 +22,31 @@ function formatChapter(chapter: Chapter): string {
   return `Chapter ${Number.isInteger(n) ? n : n.toFixed(1)}`
 }
 
+// Suwayomi always returns the proxy path (/api/v1/manga/{id}/thumbnail), never the raw CDN URL.
+// The proxy URL is only useful to Discord when the server is publicly reachable over HTTPS.
+// For localhost setups cover art falls back to the app logo until Suwayomi exposes rawThumbnailUrl.
+function resolveCoverUrl(manga: Manga): string {
+  const serverBase = (settingsState.settings.serverUrl ?? '').replace(/\/$/, '')
+  if (!serverBase.startsWith('https://')) return FALLBACK_IMAGE
+  const path = manga.thumbnailUrl?.startsWith('/') ? manga.thumbnailUrl : `/api/v1/manga/${manga.id}/thumbnail`
+  return `${serverBase}${path}`
+}
+
+function buildPresence(manga: Manga, chapter: Chapter, coverUrl: string) {
+  return {
+    details:    trunc(manga.title),
+    state:      `${formatChapter(chapter)}  ·  Reading`,
+    timestamps: { start: sessionStart ?? Date.now() },
+    assets: {
+      largeImage: coverUrl,
+      largeText:  trunc(manga.title),
+      smallImage: FALLBACK_IMAGE,
+      smallText:  'Moku',
+    },
+    buttons: APP_BUTTONS,
+  }
+}
+
 export async function initRpc(): Promise<void> {
   if (!platformService.isSupported('discord-rpc')) return
   sessionStart = Date.now()
@@ -36,18 +59,9 @@ export async function destroyRpc(): Promise<void> {
 
 export async function setReading(manga: Manga, chapter: Chapter): Promise<void> {
   if (!platformService.isSupported('discord-rpc')) return
-  await platformService.setDiscordPresence({
-    details:    trunc(manga.title),
-    state:      `${formatChapter(chapter)}  ·  Reading`,
-    timestamps: { start: sessionStart ?? Date.now() },
-    assets: {
-      largeImage: isPublicUrl(manga.thumbnailUrl) ? manga.thumbnailUrl : FALLBACK_IMAGE,
-      largeText:  trunc(manga.title),
-      smallImage: FALLBACK_IMAGE,
-      smallText:  'Moku',
-    },
-    buttons: APP_BUTTONS,
-  })
+
+  activeMangaId = manga.id
+  await platformService.setDiscordPresence(buildPresence(manga, chapter, resolveCoverUrl(manga)))
 }
 
 export async function setIdle(): Promise<void> {
diff --git a/src/routes/+layout.svelte b/src/routes/+layout.svelte
index cfa8c4e..589a6e0 100644
--- a/src/routes/+layout.svelte
+++ b/src/routes/+layout.svelte
@@ -158,30 +158,33 @@
     if (appState.status !== 'ready') return
     // capture phase so events from any component — including modals — reset the timer
     const onActivity = () => resetIdleTimer()
-    document.addEventListener('mousemove',   onActivity, true)
-    document.addEventListener('keydown',     onActivity, true)
-    document.addEventListener('touchstart',  onActivity, true)
-    document.addEventListener('touchmove',   onActivity, true)   // sustained touch-scroll in reader
-    document.addEventListener('wheel',       onActivity, true)   // mouse-wheel / trackpad scroll in reader
-    document.addEventListener('click',       onActivity, true)
+    document.addEventListener('mousemove',  onActivity, true)
+    document.addEventListener('keydown',    onActivity, true)
+    document.addEventListener('touchstart', onActivity, true)
+    // passive:true tells the browser it can render scroll frames without waiting for the handler
+    document.addEventListener('touchmove',  onActivity, { capture: true, passive: true })
+    document.addEventListener('wheel',      onActivity, { capture: true, passive: true })
+    document.addEventListener('click',      onActivity, true)
     return () => {
-      document.removeEventListener('mousemove',   onActivity, true)
-      document.removeEventListener('keydown',     onActivity, true)
-      document.removeEventListener('touchstart',  onActivity, true)
-      document.removeEventListener('touchmove',   onActivity, true)
-      document.removeEventListener('wheel',       onActivity, true)
-      document.removeEventListener('click',       onActivity, true)
+      document.removeEventListener('mousemove',  onActivity, true)
+      document.removeEventListener('keydown',    onActivity, true)
+      document.removeEventListener('touchstart', onActivity, true)
+      document.removeEventListener('touchmove',  onActivity, { capture: true })
+      document.removeEventListener('wheel',      onActivity, { capture: true })
+      document.removeEventListener('click',      onActivity, true)
     }
   })
 
   function resetIdleTimer() {
-    if (idleTimer) clearTimeout(idleTimer)
-    appState.idleSplash = false
+    if (idleTimer) { clearTimeout(idleTimer); idleTimer = null }
+    if (appState.idleSplash) appState.idleSplash = false
     // read the setting live so changes take effect without a restart
-    const timeoutMs = (settingsState.settings.idleTimeoutMin ?? 5) * 60_000
+    // 0 means "Never" — skip the timer entirely
+    const mins = settingsState.settings.idleTimeoutMin ?? 5
+    if (mins === 0) return
     idleTimer = setTimeout(() => {
       if (appState.status === 'ready') appState.idleSplash = true
-    }, timeoutMs)
+    }, mins * 60_000)
   }
 
   function onIdleDismiss() { appState.idleSplash = false; resetIdleTimer() }