feat(channel-card): add confirmation dialog for schedule regeneration

- Removed unnecessary class names for buttons in ChannelCard and DashboardPage components.
- Updated layout styles in RootLayout to apply dark mode by default.
- Refactored edit-channel-sheet to streamline block editor and filter editor components.
- Adjusted duration input fields to reflect minutes instead of seconds in AlgorithmicFilterEditor.
- Enhanced the structure of the EditChannelSheet for better readability and maintainability.

k-tv-frontend/app/(main)/dashboard/components/channel-card.tsx

@@ -1,5 +1,6 @@
 "use client";
 
+import { useState } from "react";
 import Link from "next/link";
 import {
   Pencil,
@@ -14,6 +15,7 @@ import {
 import { Button } from "@/components/ui/button";
 import { useActiveSchedule } from "@/hooks/use-channels";
 import type { ChannelResponse } from "@/lib/types";
+import { ConfirmDialog } from "./confirm-dialog";
 
 interface ChannelCardProps {
   channel: ChannelResponse;
@@ -65,6 +67,7 @@ export function ChannelCard({
   onMoveUp,
   onMoveDown,
 }: ChannelCardProps) {
+  const [confirmOpen, setConfirmOpen] = useState(false);
   const blockCount = channel.schedule_config.blocks.length;
   const { status, label } = useScheduleStatus(channel.id);
 
@@ -155,7 +158,13 @@ export function ChannelCard({
       <div className="flex gap-2">
         <Button
           size="sm"
-          onClick={onGenerateSchedule}
+          onClick={() => {
+            if (status !== "none") {
+              setConfirmOpen(true);
+            } else {
+              onGenerateSchedule();
+            }
+          }}
           disabled={isGenerating}
           className={`flex-1 ${status === "expired" ? "border border-red-800/50 bg-red-950/30 text-red-300 hover:bg-red-900/40" : ""}`}
         >
@@ -168,7 +177,6 @@ export function ChannelCard({
           size="icon-sm"
           onClick={onViewSchedule}
           title="View schedule"
-          className="border-zinc-700 text-zinc-400 hover:text-zinc-100"
         >
           <CalendarDays className="size-3.5" />
         </Button>
@@ -176,13 +184,28 @@ export function ChannelCard({
           size="icon-sm"
           asChild
           title="Watch on TV"
-          className="border-zinc-700 text-zinc-400 hover:text-zinc-100"
         >
           <Link href={`/tv?channel=${channel.id}`}>
             <Tv2 className="size-3.5" />
           </Link>
         </Button>
       </div>
+      <ConfirmDialog
+        open={confirmOpen}
+        onOpenChange={setConfirmOpen}
+        title="Regenerate schedule?"
+        description={
+          <>
+            <span className="font-medium text-zinc-200">{channel.name}</span>
+            {" "}already has an active schedule. Generating a new one will overwrite it immediately.
+          </>
+        }
+        confirmLabel="Regenerate"
+        onConfirm={() => {
+          setConfirmOpen(false);
+          onGenerateSchedule();
+        }}
+      />
     </div>
   );
 }

k-tv-frontend/app/(main)/dashboard/components/confirm-dialog.tsx

@@ -0,0 +1,67 @@
+"use client";
+
+import React from "react";
+import {
+  AlertDialog,
+  AlertDialogContent,
+  AlertDialogHeader,
+  AlertDialogTitle,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogCancel,
+  AlertDialogAction,
+} from "@/components/ui/alert-dialog";
+
+interface ConfirmDialogProps {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  title: string;
+  description: React.ReactNode;
+  confirmLabel?: string;
+  cancelLabel?: string;
+  onConfirm: () => void;
+  isPending?: boolean;
+  destructive?: boolean;
+}
+
+export function ConfirmDialog({
+  open,
+  onOpenChange,
+  title,
+  description,
+  confirmLabel = "Confirm",
+  cancelLabel = "Cancel",
+  onConfirm,
+  isPending,
+  destructive,
+}: ConfirmDialogProps) {
+  return (
+    <AlertDialog open={open} onOpenChange={onOpenChange}>
+      <AlertDialogContent className="bg-zinc-900 border-zinc-800 text-zinc-100">
+        <AlertDialogHeader>
+          <AlertDialogTitle>{title}</AlertDialogTitle>
+          <AlertDialogDescription className="text-zinc-400">
+            {description}
+          </AlertDialogDescription>
+        </AlertDialogHeader>
+        <AlertDialogFooter>
+          <AlertDialogCancel
+            disabled={isPending}
+            className="border-zinc-700 bg-transparent text-zinc-300 hover:bg-zinc-800 hover:text-zinc-100"
+          >
+            {cancelLabel}
+          </AlertDialogCancel>
+          <AlertDialogAction
+            onClick={onConfirm}
+            disabled={isPending}
+            className={
+              destructive ? "bg-red-600 text-white hover:bg-red-700" : undefined
+            }
+          >
+            {confirmLabel}
+          </AlertDialogAction>
+        </AlertDialogFooter>
+      </AlertDialogContent>
+    </AlertDialog>
+  );
+}

k-tv-frontend/app/(main)/dashboard/components/edit-channel-sheet.tsx

@@ -2,11 +2,11 @@
 
 import { useState, useEffect, useRef } from "react";
 import { z } from "zod";
-import { Trash2, Plus, ChevronDown, ChevronUp } from "lucide-react";
+import { Trash2, Plus } from "lucide-react";
 import { Sheet, SheetContent, SheetHeader, SheetTitle } from "@/components/ui/sheet";
 import { Button } from "@/components/ui/button";
 import { TagInput } from "./tag-input";
-import { BlockTimeline, BLOCK_COLORS, timeToMins, minsToTime } from "./block-timeline";
+import { BlockTimeline, BLOCK_COLORS, minsToTime } from "./block-timeline";
 import { SeriesPicker } from "./series-picker";
 import { FilterPreview } from "./filter-preview";
 import { useCollections, useSeries, useGenres } from "@/hooks/use-library";
@@ -447,23 +447,23 @@ function AlgorithmicFilterEditor({
             error={!!errors[`${pfx}.content.filter.decade`]}
           />
         </Field>
-        <Field label="Min duration (s)" error={errors[`${pfx}.content.filter.min_duration_secs`]}>
+        <Field label="Min duration (min)" error={errors[`${pfx}.content.filter.min_duration_secs`]}>
           <NumberInput
-            value={content.filter.min_duration_secs ?? ""}
+            value={content.filter.min_duration_secs != null ? Math.round(content.filter.min_duration_secs / 60) : ""}
             onChange={(v) =>
-              setFilter({ min_duration_secs: v === "" ? null : (v as number) })
+              setFilter({ min_duration_secs: v === "" ? null : (v as number) * 60 })
             }
-            placeholder="1200"
+            placeholder="30"
             error={!!errors[`${pfx}.content.filter.min_duration_secs`]}
           />
         </Field>
-        <Field label="Max duration (s)" error={errors[`${pfx}.content.filter.max_duration_secs`]}>
+        <Field label="Max duration (min)" error={errors[`${pfx}.content.filter.max_duration_secs`]}>
           <NumberInput
-            value={content.filter.max_duration_secs ?? ""}
+            value={content.filter.max_duration_secs != null ? Math.round(content.filter.max_duration_secs / 60) : ""}
             onChange={(v) =>
-              setFilter({ max_duration_secs: v === "" ? null : (v as number) })
+              setFilter({ max_duration_secs: v === "" ? null : (v as number) * 60 })
             }
-            placeholder="3600"
+            placeholder="120"
             error={!!errors[`${pfx}.content.filter.max_duration_secs`]}
           />
         </Field>
@@ -482,27 +482,12 @@ function AlgorithmicFilterEditor({
 interface BlockEditorProps {
   block: ProgrammingBlock;
   index: number;
-  isSelected: boolean;
-  color: string;
   errors: FieldErrors;
   onChange: (block: ProgrammingBlock) => void;
-  onRemove: () => void;
-  onSelect: () => void;
   providers: ProviderInfo[];
 }
 
-function BlockEditor({ block, index, isSelected, color, errors, onChange, onRemove, onSelect, providers }: BlockEditorProps) {
+function BlockEditor({ block, index, errors, onChange, providers }: BlockEditorProps) {
-  const [expanded, setExpanded] = useState(isSelected);
-  const elRef = useRef<HTMLDivElement>(null);
-
-  // Scroll into view when selected
-  useEffect(() => {
-    if (isSelected) {
-      setExpanded(true);
-      elRef.current?.scrollIntoView({ behavior: "smooth", block: "nearest" });
-    }
-  }, [isSelected]);
-
   const setField = <K extends keyof ProgrammingBlock>(key: K, value: ProgrammingBlock[K]) =>
     onChange({ ...block, [key]: value });
 
@@ -535,38 +520,7 @@ function BlockEditor({ block, index, isSelected, color, errors, onChange, onRemo
   };
 
   return (
-    <div
+    <div className="space-y-3">
-      ref={elRef}
-      className={`rounded-lg border bg-zinc-800/50 ${isSelected ? "border-zinc-500" : "border-zinc-700"}`}
-    >
-      <div className="flex items-center gap-2 px-3 py-2">
-        <div className="h-2.5 w-2.5 rounded-full shrink-0" style={{ backgroundColor: color }} />
-        <button
-          type="button"
-          onClick={() => { setExpanded((v) => !v); onSelect(); }}
-          className="flex flex-1 items-center gap-2 text-left text-sm font-medium text-zinc-200"
-        >
-          {expanded ? (
-            <ChevronUp className="size-3.5 shrink-0 text-zinc-500" />
-          ) : (
-            <ChevronDown className="size-3.5 shrink-0 text-zinc-500" />
-          )}
-          <span className="truncate">{block.name || "Unnamed block"}</span>
-          <span className="shrink-0 font-mono text-[11px] text-zinc-500">
-            {block.start_time.slice(0, 5)} · {block.duration_mins}m
-          </span>
-        </button>
-        <button
-          type="button"
-          onClick={onRemove}
-          className="rounded p-1 text-zinc-600 hover:bg-zinc-700 hover:text-red-400"
-        >
-          <Trash2 className="size-3.5" />
-        </button>
-      </div>
-
-      {expanded && (
-        <div className="space-y-3 border-t border-zinc-700 px-3 py-3">
       <div className="grid grid-cols-2 gap-3">
         <Field label="Block name" error={errors[`${pfx}.name`]}>
           <TextInput
@@ -697,8 +651,6 @@ function BlockEditor({ block, index, isSelected, color, errors, onChange, onRemo
         )}
       </div>
     </div>
-      )}
-    </div>
   );
 }
 
@@ -909,14 +861,16 @@ export function EditChannelSheet({
     <Sheet open={open} onOpenChange={onOpenChange}>
       <SheetContent
         side="right"
-        className="flex w-full flex-col gap-0 border-zinc-800 bg-zinc-900 p-0 text-zinc-100 sm:max-w-2xl"
+        className="flex w-full flex-col gap-0 border-zinc-800 bg-zinc-900 p-0 text-zinc-100 sm:!max-w-[min(1100px,95vw)]"
       >
         <SheetHeader className="border-b border-zinc-800 px-6 py-4">
           <SheetTitle className="text-zinc-100">Edit channel</SheetTitle>
         </SheetHeader>
 
         <form onSubmit={handleSubmit} className="flex flex-1 flex-col overflow-hidden">
-          <div className="flex-1 space-y-6 overflow-y-auto px-6 py-4">
+          <div className="flex flex-1 overflow-hidden">
+            {/* Left column — basic info, logo, recycle policy, webhook */}
+            <div className="w-[300px] shrink-0 overflow-y-auto border-r border-zinc-800 px-5 py-4 space-y-6">
               {/* Basic info */}
               <section className="space-y-3">
                 <h3 className="text-xs font-semibold uppercase tracking-wider text-zinc-500">Basic info</h3>
@@ -1075,56 +1029,6 @@ export function EditChannelSheet({
                 </div>
               </section>
 
-            {/* Programming blocks */}
-            <section className="space-y-3">
-              <div className="flex items-center justify-between">
-                <h3 className="text-xs font-semibold uppercase tracking-wider text-zinc-500">
-                  Programming blocks
-                </h3>
-                <Button
-                  type="button"
-                  variant="outline"
-                  size="xs"
-                  onClick={() => addBlock()}
-                  className="border-zinc-700 text-zinc-300 hover:text-zinc-100"
-                >
-                  <Plus className="size-3" />
-                  Add block
-                </Button>
-              </div>
-
-              <BlockTimeline
-                blocks={blocks}
-                selectedId={selectedBlockId}
-                onSelect={setSelectedBlockId}
-                onChange={setBlocks}
-                onCreateBlock={(startMins, durationMins) => addBlock(startMins, durationMins)}
-              />
-
-              {blocks.length === 0 && (
-                <p className="rounded-md border border-dashed border-zinc-700 px-4 py-6 text-center text-xs text-zinc-600">
-                  No blocks yet. Drag on the timeline or click Add block.
-                </p>
-              )}
-
-              <div className="space-y-2">
-                {blocks.map((block, idx) => (
-                  <BlockEditor
-                    key={block.id}
-                    block={block}
-                    index={idx}
-                    isSelected={block.id === selectedBlockId}
-                    color={BLOCK_COLORS[idx % BLOCK_COLORS.length]}
-                    errors={fieldErrors}
-                    onChange={(b) => updateBlock(idx, b)}
-                    onRemove={() => removeBlock(idx)}
-                    onSelect={() => setSelectedBlockId(block.id)}
-                    providers={providers}
-                  />
-                ))}
-              </div>
-            </section>
-
               {/* Recycle policy */}
               <section className="space-y-3">
                 <h3 className="text-xs font-semibold uppercase tracking-wider text-zinc-500">Recycle policy</h3>
@@ -1216,6 +1120,107 @@ export function EditChannelSheet({
               </section>
             </div>
 
+            {/* Right column — programming blocks */}
+            <div className="flex flex-1 flex-col overflow-hidden">
+              {/* Upper half: timeline + block list */}
+              <div className="shrink-0 border-b border-zinc-800 px-5 py-4 space-y-3">
+                <div className="flex items-center justify-between">
+                  <h3 className="text-xs font-semibold uppercase tracking-wider text-zinc-500">
+                    Programming blocks
+                  </h3>
+                  <Button
+                    type="button"
+                    variant="outline"
+                    size="xs"
+                    onClick={() => addBlock()}
+                    className="border-zinc-700 text-zinc-300 hover:text-zinc-100"
+                  >
+                    <Plus className="size-3" />
+                    Add block
+                  </Button>
+                </div>
+
+                <BlockTimeline
+                  blocks={blocks}
+                  selectedId={selectedBlockId}
+                  onSelect={setSelectedBlockId}
+                  onChange={setBlocks}
+                  onCreateBlock={(startMins, durationMins) => addBlock(startMins, durationMins)}
+                />
+
+                {blocks.length === 0 ? (
+                  <p className="rounded-md border border-dashed border-zinc-700 px-4 py-4 text-center text-xs text-zinc-600">
+                    No blocks yet. Drag on the timeline or click Add block.
+                  </p>
+                ) : (
+                  <div className="space-y-1 max-h-48 overflow-y-auto">
+                    {blocks.map((block, idx) => (
+                      <button
+                        key={block.id}
+                        type="button"
+                        onClick={() => setSelectedBlockId(block.id)}
+                        className={`flex w-full items-center gap-2 rounded-md px-3 py-2 text-left transition-colors ${
+                          block.id === selectedBlockId
+                            ? "border border-zinc-600 bg-zinc-700/60"
+                            : "border border-transparent hover:bg-zinc-800/60"
+                        }`}
+                      >
+                        <div
+                          className="h-2.5 w-2.5 shrink-0 rounded-full"
+                          style={{ backgroundColor: BLOCK_COLORS[idx % BLOCK_COLORS.length] }}
+                        />
+                        <span className="flex-1 truncate text-sm text-zinc-200">
+                          {block.name || "Unnamed block"}
+                        </span>
+                        <span className="shrink-0 font-mono text-[11px] text-zinc-500">
+                          {block.start_time.slice(0, 5)} · {block.duration_mins}m
+                        </span>
+                        <span
+                          role="button"
+                          onClick={(e) => { e.stopPropagation(); removeBlock(idx); }}
+                          className="rounded p-1 text-zinc-600 hover:bg-zinc-700 hover:text-red-400"
+                        >
+                          <Trash2 className="size-3.5" />
+                        </span>
+                      </button>
+                    ))}
+                  </div>
+                )}
+              </div>
+
+              {/* Lower half: selected block detail */}
+              <div className="flex-1 overflow-y-auto px-5 py-4">
+                {(() => {
+                  if (selectedBlockId === null) {
+                    return (
+                      <div className="flex h-full items-center justify-center text-sm text-zinc-600">
+                        Select a block or create one
+                      </div>
+                    );
+                  }
+                  const selectedIdx = blocks.findIndex((b) => b.id === selectedBlockId);
+                  const selectedBlock = selectedIdx >= 0 ? blocks[selectedIdx] : null;
+                  if (!selectedBlock) {
+                    return (
+                      <div className="flex h-full items-center justify-center text-sm text-zinc-600">
+                        Select a block or create one
+                      </div>
+                    );
+                  }
+                  return (
+                    <BlockEditor
+                      block={selectedBlock}
+                      index={selectedIdx}
+                      errors={fieldErrors}
+                      onChange={(b) => updateBlock(selectedIdx, b)}
+                      providers={providers}
+                    />
+                  );
+                })()}
+              </div>
+            </div>
+          </div>
+
           {/* Footer */}
           <div className="flex items-center justify-between border-t border-zinc-800 px-6 py-4">
             {(error || Object.keys(fieldErrors).length > 0) && (

k-tv-frontend/app/(main)/dashboard/page.tsx

@@ -241,7 +241,6 @@ export default function DashboardPage() {
             <Button
               onClick={() => setTranscodeOpen(true)}
               title="Transcode settings"
-              className="border-zinc-700 text-zinc-400 hover:text-zinc-100"
             >
               <Settings2 className="size-4" />
               Transcode
@@ -257,7 +256,6 @@ export default function DashboardPage() {
               }
               disabled={rescanLibrary.isPending}
               title="Rescan local files directory"
-              className="border-zinc-700 text-zinc-400 hover:text-zinc-100"
             >
               <RefreshCw className={`size-4 ${rescanLibrary.isPending ? "animate-spin" : ""}`} />
               Rescan library
@@ -268,7 +266,6 @@ export default function DashboardPage() {
               onClick={handleRegenerateAll}
               disabled={isRegeneratingAll}
               title="Regenerate schedules for all channels"
-              className="border-zinc-700 text-zinc-400 hover:text-zinc-100"
             >
               <RefreshCw
                 className={`size-4 ${isRegeneratingAll ? "animate-spin" : ""}`}
@@ -276,17 +273,11 @@ export default function DashboardPage() {
               Regenerate all
             </Button>
           )}
-          <Button
+          <Button onClick={() => setIptvOpen(true)}>
-            onClick={() => setIptvOpen(true)}
-            className="border-zinc-700 text-zinc-300 hover:text-zinc-100"
-          >
             <Antenna className="size-4" />
             IPTV
           </Button>
-          <Button
+          <Button onClick={() => setImportOpen(true)}>
-            onClick={() => setImportOpen(true)}
-            className="border-zinc-700 text-zinc-300 hover:text-zinc-100"
-          >
             <Upload className="size-4" />
             Import
           </Button>

k-tv-frontend/app/layout.tsx

@@ -26,7 +26,7 @@ export default function RootLayout({
   children: React.ReactNode;
 }>) {
   return (
-    <html lang="en">
+    <html lang="en" className="dark">
       <head>
         <Script
           src="https://www.gstatic.com/cv/js/sender/v1/cast_sender.js?loadCastFramework=1"