feat(ui): add ConfirmDialog and StreamingTerminal components

components/ConfirmDialog.tsx

@@ -0,0 +1,62 @@
+'use client'
+
+type Props = {
+  open: boolean
+  title?: string
+  commandPreview: string
+  onConfirm: () => void
+  onCancel: () => void
+  loading?: boolean
+}
+
+export default function ConfirmDialog({
+  open,
+  title = 'Confirm action',
+  commandPreview,
+  onConfirm,
+  onCancel,
+  loading = false,
+}: Props) {
+  if (!open) return null
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center">
+      <div
+        className="absolute inset-0 bg-black/50"
+        onClick={onCancel}
+        aria-hidden="true"
+      />
+      <div className="relative z-10 w-full max-w-lg rounded-xl border border-border bg-background p-6 shadow-lg">
+        <h2 className="text-base font-semibold tracking-tight">{title}</h2>
+        <p className="mt-1 text-sm text-muted-foreground">
+          The following command will be executed on the server:
+        </p>
+
+        <pre className="mt-3 overflow-x-auto rounded-lg border border-border bg-muted/50 px-4 py-3 font-mono text-xs text-foreground select-all">
+          {commandPreview}
+        </pre>
+
+        <p className="mt-3 text-xs text-muted-foreground">
+          This action cannot be undone. Review the command above before confirming.
+        </p>
+
+        <div className="mt-5 flex justify-end gap-3">
+          <button
+            onClick={onCancel}
+            disabled={loading}
+            className="rounded-lg border border-border px-4 py-2 text-sm hover:bg-muted/50 disabled:opacity-50 transition-colors"
+          >
+            Cancel
+          </button>
+          <button
+            onClick={onConfirm}
+            disabled={loading}
+            className="rounded-lg bg-destructive/10 border border-destructive/30 px-4 py-2 text-sm font-medium text-destructive hover:bg-destructive/20 disabled:opacity-50 transition-colors"
+          >
+            {loading ? 'Running…' : 'Confirm'}
+          </button>
+        </div>
+      </div>
+    </div>
+  )
+}

components/StreamingTerminal.tsx

@@ -0,0 +1,89 @@
+'use client'
+
+import { useEffect, useRef } from 'react'
+
+export type TerminalLine = {
+  type: 'stdout' | 'stderr'
+  text: string
+}
+
+export type TerminalStatus = 'idle' | 'running' | 'done' | 'failed' | 'error'
+
+type Props = {
+  lines: TerminalLine[]
+  status: TerminalStatus
+  error?: string | null
+  className?: string
+}
+
+export default function StreamingTerminal({ lines, status, error, className = '' }: Props) {
+  const bottomRef = useRef<HTMLDivElement>(null)
+
+  useEffect(() => {
+    bottomRef.current?.scrollIntoView({ behavior: 'smooth' })
+  }, [lines])
+
+  const statusBar = () => {
+    if (status === 'running') {
+      return (
+        <div className="flex items-center gap-2 px-3 py-1.5 text-xs text-muted-foreground border-t border-border">
+          <span className="inline-block size-2 rounded-full bg-amber-400 animate-pulse" />
+          Running…
+        </div>
+      )
+    }
+    if (status === 'done') {
+      return (
+        <div className="flex items-center gap-2 px-3 py-1.5 text-xs text-green-400 border-t border-border">
+          <span className="inline-block size-2 rounded-full bg-green-400" />
+          Completed successfully
+        </div>
+      )
+    }
+    if (status === 'failed') {
+      return (
+        <div className="flex items-center gap-2 px-3 py-1.5 text-xs text-red-400 border-t border-border">
+          <span className="inline-block size-2 rounded-full bg-red-500" />
+          Exited with error
+        </div>
+      )
+    }
+    if (status === 'error') {
+      return (
+        <div className="flex items-center gap-2 px-3 py-1.5 text-xs text-red-400 border-t border-border">
+          <span className="inline-block size-2 rounded-full bg-red-500" />
+          {error ?? 'Unknown error'}
+        </div>
+      )
+    }
+    return null
+  }
+
+  return (
+    <div
+      className={
+        'flex flex-col rounded-lg border border-border bg-zinc-950 font-mono text-xs overflow-hidden ' +
+        className
+      }
+    >
+      <div className="flex-1 overflow-y-auto max-h-96 p-3 space-y-0">
+        {lines.length === 0 && status === 'running' && (
+          <span className="text-zinc-500 animate-pulse">Waiting for output…</span>
+        )}
+        {lines.map((line, i) => (
+          <pre
+            key={i}
+            className={
+              'whitespace-pre-wrap break-all leading-5 ' +
+              (line.type === 'stderr' ? 'text-red-400' : 'text-zinc-100')
+            }
+          >
+            {line.text}
+          </pre>
+        ))}
+        <div ref={bottomRef} />
+      </div>
+      {statusBar()}
+    </div>
+  )
+}