feat(ui): add network probe creation dialog

Dialog component for adding ICMP/TCP/HTTP network probes with
protocol selection, target, port, interval, and name fields.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

internal/site/src/components/routes/system/probe-dialog.tsx

@@ -0,0 +1,162 @@
+import { useState } from "react"
+import { Trans, useLingui } from "@lingui/react/macro"
+import { pb } from "@/lib/api"
+import {
+	Dialog,
+	DialogContent,
+	DialogDescription,
+	DialogFooter,
+	DialogHeader,
+	DialogTitle,
+	DialogTrigger,
+} from "@/components/ui/dialog"
+import { Button } from "@/components/ui/button"
+import { Input } from "@/components/ui/input"
+import { Label } from "@/components/ui/label"
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select"
+import { PlusIcon } from "lucide-react"
+import { useToast } from "@/components/ui/use-toast"
+
+export function AddProbeDialog({
+	systemId,
+	onCreated,
+}: {
+	systemId: string
+	onCreated: () => void
+}) {
+	const [open, setOpen] = useState(false)
+	const [protocol, setProtocol] = useState<string>("icmp")
+	const [target, setTarget] = useState("")
+	const [port, setPort] = useState("")
+	const [interval, setInterval] = useState("10")
+	const [name, setName] = useState("")
+	const [loading, setLoading] = useState(false)
+	const { toast } = useToast()
+	const { t } = useLingui()
+
+	const resetForm = () => {
+		setProtocol("icmp")
+		setTarget("")
+		setPort("")
+		setInterval("10")
+		setName("")
+	}
+
+	const handleSubmit = async (e: React.FormEvent) => {
+		e.preventDefault()
+		setLoading(true)
+		try {
+			await pb.send("/api/beszel/network-probes", {
+				method: "POST",
+				body: {
+					system: systemId,
+					name,
+					target,
+					protocol,
+					port: protocol === "tcp" ? Number(port) : 0,
+					interval: Number(interval),
+				},
+			})
+			resetForm()
+			setOpen(false)
+			onCreated()
+		} catch (err: any) {
+			toast({ variant: "destructive", title: t`Error`, description: err?.message })
+		} finally {
+			setLoading(false)
+		}
+	}
+
+	return (
+		<Dialog open={open} onOpenChange={setOpen}>
+			<DialogTrigger asChild>
+				<Button variant="outline" size="sm">
+					<PlusIcon className="size-4 me-1" />
+					<Trans>Add Probe</Trans>
+				</Button>
+			</DialogTrigger>
+			<DialogContent className="max-w-md">
+				<DialogHeader>
+					<DialogTitle>
+						<Trans>Add Network Probe</Trans>
+					</DialogTitle>
+					<DialogDescription>
+						<Trans>Configure ICMP, TCP, or HTTP latency monitoring from this agent.</Trans>
+					</DialogDescription>
+				</DialogHeader>
+				<form onSubmit={handleSubmit} className="grid gap-4">
+					<div className="grid gap-2">
+						<Label>
+							<Trans>Protocol</Trans>
+						</Label>
+						<Select value={protocol} onValueChange={setProtocol}>
+							<SelectTrigger>
+								<SelectValue />
+							</SelectTrigger>
+							<SelectContent>
+								<SelectItem value="icmp">ICMP</SelectItem>
+								<SelectItem value="tcp">TCP</SelectItem>
+								<SelectItem value="http">HTTP</SelectItem>
+							</SelectContent>
+						</Select>
+					</div>
+					<div className="grid gap-2">
+						<Label>
+							<Trans>Target</Trans>
+						</Label>
+						<Input
+							value={target}
+							onChange={(e) => setTarget(e.target.value)}
+							placeholder={protocol === "http" ? "https://example.com" : "1.1.1.1"}
+							required
+						/>
+					</div>
+					{protocol === "tcp" && (
+						<div className="grid gap-2">
+							<Label>
+								<Trans>Port</Trans>
+							</Label>
+							<Input
+								type="number"
+								value={port}
+								onChange={(e) => setPort(e.target.value)}
+								placeholder="443"
+								min={1}
+								max={65535}
+								required
+							/>
+						</div>
+					)}
+					<div className="grid gap-2">
+						<Label>
+							<Trans>Interval (seconds)</Trans>
+						</Label>
+						<Input
+							type="number"
+							value={interval}
+							onChange={(e) => setInterval(e.target.value)}
+							min={1}
+							max={3600}
+							required
+						/>
+					</div>
+					<div className="grid gap-2">
+						<Label>
+							<Trans>Name (optional)</Trans>
+						</Label>
+						<Input
+							value={name}
+							onChange={(e) => setName(e.target.value)}
+							placeholder={t`e.g. Cloudflare DNS`}
+						/>
+					</div>
+					<DialogFooter>
+						<Button type="submit" disabled={loading}>
+							{loading ? <Trans>Creating...</Trans> : <Trans>Create</Trans>}
+						</Button>
+					</DialogFooter>
+				</form>
+			</DialogContent>
+		</Dialog>
+	)
+}