fix(cli-run): silence wait noise and suppress raw arrow escape input

src/cli/run/stdin-suppression.ts

@@ -0,0 +1,52 @@
+type StdinLike = {
+  isTTY?: boolean
+  isRaw?: boolean
+  setRawMode?: (mode: boolean) => void
+  isPaused?: () => boolean
+  resume: () => void
+  pause: () => void
+  on: (event: "data", listener: (chunk: string | Uint8Array) => void) => void
+  removeListener: (event: "data", listener: (chunk: string | Uint8Array) => void) => void
+}
+
+function includesCtrlC(chunk: string | Uint8Array): boolean {
+  const text = typeof chunk === "string" ? chunk : Buffer.from(chunk).toString("utf8")
+  return text.includes("\u0003")
+}
+
+export function suppressRunInput(
+  stdin: StdinLike = process.stdin,
+  onInterrupt: () => void = () => {
+    process.kill(process.pid, "SIGINT")
+  }
+): () => void {
+  if (!stdin.isTTY) {
+    return () => {}
+  }
+
+  const wasRaw = stdin.isRaw === true
+  const wasPaused = stdin.isPaused?.() ?? false
+  const canSetRawMode = typeof stdin.setRawMode === "function"
+
+  const onData = (chunk: string | Uint8Array) => {
+    if (includesCtrlC(chunk)) {
+      onInterrupt()
+    }
+  }
+
+  if (canSetRawMode) {
+    stdin.setRawMode!(true)
+  }
+  stdin.on("data", onData)
+  stdin.resume()
+
+  return () => {
+    stdin.removeListener("data", onData)
+    if (canSetRawMode) {
+      stdin.setRawMode!(wasRaw)
+    }
+    if (wasPaused) {
+      stdin.pause()
+    }
+  }
+}