fix(cloud): cold-start tuning for the headless serve container

First real CF cold start 503'd (companion didn't bind within the 60s poll).
- wrangler.toml: instance_type standard(½ vCPU) -> standard-3 (2 vCPU/8GiB);
  WebKitGTK + Xvfb init needs real CPU. Also clears the standard->standard-1
  rename warning.
- index.ts: health poll 60s -> 120s for a heavy first-boot init.
- start-serve.sh: skip if a serve host is already running (the Worker calls
  startProcess on every not-ready request; a 2nd serve fought for the port).

Author: dohooo

cloud/scripts/start-serve.sh

@@ -32,6 +32,14 @@ git config --global user.name "${HELMOR_GIT_NAME:-Helmor Cloud}" || true
 git config --global user.email "${HELMOR_GIT_EMAIL:-cloud@helmor.app}" || true
 git config --global --add safe.directory '*' || true
 
+# Idempotency: the Worker calls startProcess on every not-yet-ready request, so
+# bail out if a serve host is already running — a second one would fight for the
+# companion port and neither would bind cleanly.
+if pgrep -f "${HELMOR_HOME}/helmor serve" >/dev/null 2>&1; then
+	echo "helmor-start-serve: serve already running; nothing to do"
+	exit 0
+fi
+
 # 1. Independent Xvfb daemon (idempotent — skip if one is already running).
 if ! pgrep -x Xvfb >/dev/null 2>&1; then
 	Xvfb "$DISPLAY" -screen 0 1280x800x24 -nolisten tcp >/tmp/xvfb.log 2>&1 &

cloud/src/index.ts

@@ -81,8 +81,9 @@ async function ensureServe(
 		},
 	});
 
-	// Cold start: Xvfb + GTK/WebKit init + companion bind. Poll up to ~60s.
-	for (let attempt = 0; attempt < 120; attempt++) {
+	// Cold start: Xvfb + GTK/WebKit init + companion bind. Poll up to ~120s
+	// (WebKitGTK init is heavy on a fresh container's first boot).
+	for (let attempt = 0; attempt < 240; attempt++) {
 		if (await healthOk(sandbox, port)) return;
 		await sleep(500);
 	}

cloud/wrangler.toml

@@ -21,7 +21,7 @@ compatibility_flags = ["nodejs_compat"]
 [[containers]]
 class_name = "Sandbox"
 image = "../Dockerfile"
-instance_type = "standard"
+instance_type = "standard-3"
 max_instances = 1
 
 [[durable_objects.bindings]]