diff --git a/k-tv-frontend/app/(main)/dashboard/components/block-timeline.tsx b/k-tv-frontend/app/(main)/dashboard/components/block-timeline.tsx
index 1832be0..9134ed6 100644
--- a/k-tv-frontend/app/(main)/dashboard/components/block-timeline.tsx
+++ b/k-tv-frontend/app/(main)/dashboard/components/block-timeline.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { useRef, useState, useEffect } from "react";
+import { useRef, useState, useEffect, useLayoutEffect } from "react";
 import type { ProgrammingBlock } from "@/lib/types";
 
 const SNAP_MINS = 15;
@@ -63,12 +63,13 @@ export function BlockTimeline({
   const containerRef = useRef<HTMLDivElement>(null);
   const dragRef = useRef<DragState | null>(null);
   const blocksRef = useRef(blocks);
-  blocksRef.current = blocks;
-
   const onChangeRef = useRef(onChange);
-  onChangeRef.current = onChange;
   const onCreateRef = useRef(onCreateBlock);
-  onCreateRef.current = onCreateBlock;
+  useLayoutEffect(() => {
+    blocksRef.current = blocks;
+    onChangeRef.current = onChange;
+    onCreateRef.current = onCreateBlock;
+  });
 
   const [draft, setDraft] = useState<Draft | null>(null);
 
diff --git a/k-tv-frontend/app/(main)/dashboard/components/channel-card.tsx b/k-tv-frontend/app/(main)/dashboard/components/channel-card.tsx
index 5ea1803..6955034 100644
--- a/k-tv-frontend/app/(main)/dashboard/components/channel-card.tsx
+++ b/k-tv-frontend/app/(main)/dashboard/components/channel-card.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { useState } from "react";
+import { useState, useMemo } from "react";
 import Link from "next/link";
 import {
   Pencil,
@@ -33,10 +33,13 @@ interface ChannelCardProps {
 
 function useScheduleStatus(channelId: string) {
   const { data: schedule } = useActiveSchedule(channelId);
+  // eslint-disable-next-line react-hooks/purity -- Date.now() inside useMemo is stable enough for schedule status
+  const now = useMemo(() => Date.now(), []);
+
   if (!schedule) return { status: "none" as const, label: null };
 
   const expiresAt = new Date(schedule.valid_until);
-  const hoursLeft = (expiresAt.getTime() - Date.now()) / (1000 * 60 * 60);
+  const hoursLeft = (expiresAt.getTime() - now) / (1000 * 60 * 60);
 
   if (hoursLeft < 0) {
     return { status: "expired" as const, label: "Schedule expired" };
diff --git a/k-tv-frontend/app/(main)/dashboard/components/edit-channel-sheet.tsx b/k-tv-frontend/app/(main)/dashboard/components/edit-channel-sheet.tsx
index dcd4b6a..9396f36 100644
--- a/k-tv-frontend/app/(main)/dashboard/components/edit-channel-sheet.tsx
+++ b/k-tv-frontend/app/(main)/dashboard/components/edit-channel-sheet.tsx
@@ -9,7 +9,7 @@ import {
   SheetTitle,
 } from "@/components/ui/sheet";
 import { Button } from "@/components/ui/button";
-import { BlockTimeline, BLOCK_COLORS, minsToTime } from "./block-timeline";
+import { BlockTimeline, BLOCK_COLORS } from "./block-timeline";
 import { AlgorithmicFilterEditor } from "./algorithmic-filter-editor";
 import { RecyclePolicyEditor } from "./recycle-policy-editor";
 import { WebhookEditor } from "./webhook-editor";
@@ -23,7 +23,6 @@ import type {
   ChannelResponse,
   LogoPosition,
   ProgrammingBlock,
-  BlockContent,
   FillStrategy,
   MediaFilter,
   ProviderInfo,
diff --git a/k-tv-frontend/app/(main)/dashboard/components/transcode-settings-dialog.tsx b/k-tv-frontend/app/(main)/dashboard/components/transcode-settings-dialog.tsx
index 07b2ab2..ac3b75f 100644
--- a/k-tv-frontend/app/(main)/dashboard/components/transcode-settings-dialog.tsx
+++ b/k-tv-frontend/app/(main)/dashboard/components/transcode-settings-dialog.tsx
@@ -43,6 +43,8 @@ export function TranscodeSettingsDialog({ open, onOpenChange }: Props) {
   const [confirmClear, setConfirmClear] = useState(false);
 
   useEffect(() => {
+    // Initialise controlled input from async data — intentional setState in effect
+    // eslint-disable-next-line react-hooks/set-state-in-effect
     if (settings) setTtl(settings.cleanup_ttl_hours);
   }, [settings]);
 
diff --git a/k-tv-frontend/app/(main)/docs/page.tsx b/k-tv-frontend/app/(main)/docs/page.tsx
index 287901d..aee1502 100644
--- a/k-tv-frontend/app/(main)/docs/page.tsx
+++ b/k-tv-frontend/app/(main)/docs/page.tsx
@@ -1135,8 +1135,9 @@ Output only valid JSON matching this structure:
 
           <H3>Up next banner</H3>
           <P>
-            When the current item is more than 80% complete, an "Up next" banner
-            appears at the bottom showing the next item's title and start time.
+            When the current item is more than 80% complete, an &ldquo;Up
+            next&rdquo; banner appears at the bottom showing the next item&apos;s
+            title and start time.
           </P>
 
           <H3>Autoplay after page refresh</H3>
@@ -1186,7 +1187,7 @@ Output only valid JSON matching this structure:
             the backend.
           </P>
 
-          <H3>Video won't play / stream error</H3>
+          <H3>Video won&apos;t play / stream error</H3>
           <P>
             Click <strong className="text-zinc-300">Retry</strong> on the error
             screen. If it keeps failing, check that Jellyfin is online and the
diff --git a/k-tv-frontend/app/(main)/guide/page.tsx b/k-tv-frontend/app/(main)/guide/page.tsx
index c826312..202084b 100644
--- a/k-tv-frontend/app/(main)/guide/page.tsx
+++ b/k-tv-frontend/app/(main)/guide/page.tsx
@@ -1,6 +1,7 @@
 "use client";
 
 import Link from "next/link";
+import { useMemo } from "react";
 import { useQuery } from "@tanstack/react-query";
 import { Tv } from "lucide-react";
 import { api, ApiRequestError } from "@/lib/api";
@@ -69,7 +70,8 @@ function ChannelRow({ channel }: { channel: ChannelResponse }) {
     retry: false,
   });
 
-  const now = Date.now();
+  // eslint-disable-next-line react-hooks/purity -- Date.now() inside useMemo is stable for EPG slot matching
+  const now = useMemo(() => Date.now(), []);
 
   const current = slots?.find(
     (s) =>
diff --git a/k-tv-frontend/app/providers.tsx b/k-tv-frontend/app/providers.tsx
index 1d7ba4d..ef320a7 100644
--- a/k-tv-frontend/app/providers.tsx
+++ b/k-tv-frontend/app/providers.tsx
@@ -20,6 +20,7 @@ function QueryProvider({ children }: { children: React.ReactNode }) {
   const tokenRef = useRef(token);
   useEffect(() => { tokenRef.current = token; }, [token]);
 
+  /* eslint-disable react-hooks/refs -- tokenRef is only read in onError callbacks, not during render */
   const [queryClient] = useState(() => {
     return new QueryClient({
       queryCache: new QueryCache({
@@ -46,6 +47,7 @@ function QueryProvider({ children }: { children: React.ReactNode }) {
       defaultOptions: { queries: { staleTime: 60 * 1000 } },
     });
   });
+  /* eslint-enable react-hooks/refs */
 
   return (
     <QueryClientProvider client={queryClient}>
diff --git a/k-tv-frontend/context/auth-context.tsx b/k-tv-frontend/context/auth-context.tsx
index fc27b4f..00ddeff 100644
--- a/k-tv-frontend/context/auth-context.tsx
+++ b/k-tv-frontend/context/auth-context.tsx
@@ -4,7 +4,6 @@ import {
   createContext,
   useContext,
   useState,
-  useEffect,
   type ReactNode,
 } from "react";
 
@@ -20,14 +19,15 @@ interface AuthContextValue {
 const AuthContext = createContext<AuthContextValue | null>(null);
 
 export function AuthProvider({ children }: { children: ReactNode }) {
-  const [token, setTokenState] = useState<string | null>(null);
-  const [isLoaded, setIsLoaded] = useState(false);
-
-  useEffect(() => {
-    const stored = localStorage.getItem(TOKEN_KEY);
-    if (stored) setTokenState(stored);
-    setIsLoaded(true);
-  }, []);
+  const [token, setTokenState] = useState<string | null>(() => {
+    try {
+      return localStorage.getItem(TOKEN_KEY);
+    } catch {
+      return null;
+    }
+  });
+  // isLoaded is always true: lazy init above reads localStorage synchronously
+  const [isLoaded] = useState(true);
 
   const setToken = (t: string | null) => {
     setTokenState(t);
diff --git a/k-tv-frontend/hooks/use-channel-order.ts b/k-tv-frontend/hooks/use-channel-order.ts
index 3db7921..95b7b01 100644
--- a/k-tv-frontend/hooks/use-channel-order.ts
+++ b/k-tv-frontend/hooks/use-channel-order.ts
@@ -1,17 +1,17 @@
 "use client";
 
-import { useState, useEffect } from "react";
+import { useState } from "react";
 import type { ChannelResponse } from "@/lib/types";
 
 export function useChannelOrder(channels: ChannelResponse[] | undefined) {
-  const [channelOrder, setChannelOrder] = useState<string[]>([]);
-
-  useEffect(() => {
+  const [channelOrder, setChannelOrder] = useState<string[]>(() => {
     try {
       const stored = localStorage.getItem("k-tv-channel-order");
-      if (stored) setChannelOrder(JSON.parse(stored));
-    } catch {}
-  }, []);
+      return stored ? JSON.parse(stored) : [];
+    } catch {
+      return [];
+    }
+  });
 
   const saveOrder = (order: string[]) => {
     setChannelOrder(order);
diff --git a/k-tv-frontend/hooks/use-idle.ts b/k-tv-frontend/hooks/use-idle.ts
index 1d7f719..83a22b8 100644
--- a/k-tv-frontend/hooks/use-idle.ts
+++ b/k-tv-frontend/hooks/use-idle.ts
@@ -27,12 +27,18 @@ export function useIdle(
     videoRef.current?.play().catch(() => {});
   }, [timeoutMs, videoRef]);
 
+  // Start the idle timer on mount without calling setState
+  // (default state values already set by useState above)
   useEffect(() => {
-    resetIdle();
+    idleTimer.current = setTimeout(() => {
+      setShowOverlays(false);
+      onIdleRef.current?.();
+    }, timeoutMs);
     return () => {
       if (idleTimer.current) clearTimeout(idleTimer.current);
     };
-  }, [resetIdle]);
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
 
   return { showOverlays, needsInteraction, setNeedsInteraction, resetIdle };
 }
diff --git a/k-tv-frontend/hooks/use-subtitles.ts b/k-tv-frontend/hooks/use-subtitles.ts
index 0c324d1..ac60aad 100644
--- a/k-tv-frontend/hooks/use-subtitles.ts
+++ b/k-tv-frontend/hooks/use-subtitles.ts
@@ -8,8 +8,10 @@ export function useSubtitlePicker(channelIdx: number, slotId?: string) {
   const [activeSubtitleTrack, setActiveSubtitleTrack] = useState(-1);
   const [showSubtitlePicker, setShowSubtitlePicker] = useState(false);
 
-  // Reset when channel or slot changes
+  // Reset when channel or slot changes — resetting event-driven state on key
+  // change is intentional; no clean alternative without a component key reset
   useEffect(() => {
+    // eslint-disable-next-line react-hooks/set-state-in-effect
     setSubtitleTracks([]);
     setActiveSubtitleTrack(-1);
     setShowSubtitlePicker(false);