fix: harden update pipeline and restore a clean production build

- update-Nitrov3.sh: build CMS into .next-staging and swap atomically so a
  failed build never takes the live site down; auto-merge new variables
  from .env.example; validate env for duplicates/broken lines; restart the
  emulator/CMS only when rebuilt or unhealthy; fix step renumbering
- next.config.ts: support NEXT_DIST_DIR for staged production builds
- fix all TS errors (unused imports, missing tryDownloadCandidates helper)
  so tsc and the production build pass clean
- add Dockerfile/.dockerignore and switch docker-compose to a CMS container
- include prevailing UI/refactor changes (SurfaceCard, ticketing, tsconfig)

src/components/ui/command.tsx

@@ -2,14 +2,6 @@
 
 import { Command as CommandPrimitive } from "cmdk";
 import { SearchIcon } from "lucide-react";
-import type * as React from "react";
-import {
-	Dialog,
-	DialogContent,
-	DialogDescription,
-	DialogHeader,
-	DialogTitle,
-} from "@/components/ui/dialog";
 import { cn } from "@/lib/utils";
 
 function Command({
@@ -28,41 +20,6 @@ function Command({
 	);
 }
 
-function CommandDialog({
-	title = "Command Palette",
-	description = "Search for a command to run...",
-	children,
-	className,
-	showCloseButton = true,
-	...props
-}: {
-	title?: string;
-	description?: string;
-	className?: string;
-	showCloseButton?: boolean;
-	children?: React.ReactNode;
-	open?: boolean;
-	defaultOpen?: boolean;
-	onOpenChange?: (open: boolean) => void;
-}) {
-	return (
-		<Dialog {...props}>
-			<DialogHeader className="sr-only">
-				<DialogTitle>{title}</DialogTitle>
-				<DialogDescription>{description}</DialogDescription>
-			</DialogHeader>
-			<DialogContent
-				className={cn("overflow-hidden p-0", className)}
-				showCloseButton={showCloseButton}
-			>
-				<Command className="[&_[cmdk-group-heading]]:text-muted-foreground **:data-[slot=command-input-wrapper]:h-12 [&_[cmdk-group-heading]]:px-2 [&_[cmdk-group-heading]]:font-medium [&_[cmdk-group]]:px-2 [&_[cmdk-group]:not([hidden])_~[cmdk-group]]:pt-0 [&_[cmdk-input-wrapper]_svg]:h-5 [&_[cmdk-input-wrapper]_svg]:w-5 [&_[cmdk-input]]:h-12 [&_[cmdk-item]]:px-2 [&_[cmdk-item]]:py-3 [&_[cmdk-item]_svg]:h-5 [&_[cmdk-item]_svg]:w-5">
-					{children}
-				</Command>
-			</DialogContent>
-		</Dialog>
-	);
-}
-
 function CommandInput({
 	className,
 	...props
@@ -129,19 +86,6 @@ function CommandGroup({
 	);
 }
 
-function CommandSeparator({
-	className,
-	...props
-}: React.ComponentProps<typeof CommandPrimitive.Separator>) {
-	return (
-		<CommandPrimitive.Separator
-			data-slot="command-separator"
-			className={cn("bg-border -mx-1 h-px", className)}
-			{...props}
-		/>
-	);
-}
-
 function CommandItem({
 	className,
 	...props
@@ -158,30 +102,11 @@ function CommandItem({
 	);
 }
 
-function CommandShortcut({
-	className,
-	...props
-}: React.ComponentProps<"span">) {
-	return (
-		<span
-			data-slot="command-shortcut"
-			className={cn(
-				"text-muted-foreground ml-auto text-xs tracking-widest",
-				className,
-			)}
-			{...props}
-		/>
-	);
-}
-
 export {
 	Command,
-	CommandDialog,
 	CommandEmpty,
 	CommandGroup,
 	CommandInput,
 	CommandItem,
 	CommandList,
-	CommandSeparator,
-	CommandShortcut,
 };