refactor: split daytona example into two variants

- daytona.ts (default): Installs sandbox-agent at runtime. Faster to
  start but installs on each run. Use for quick testing.
- daytona-with-snapshot.ts: Builds custom image with sandbox-agent
  pre-installed. Slow first run (~2-3 min) but fast subsequent runs.
  Use for repeated development.

Run with: pnpm start (default) or pnpm start:snapshot

examples/daytona/src/daytona-with-snapshot.ts

@@ -0,0 +1,41 @@
+import { Daytona, Image } from "@daytonaio/sdk";
+import { logInspectorUrl, runPrompt } from "@sandbox-agent/example-shared";
+
+const daytona = new Daytona();
+
+const envVars: Record<string, string> = {};
+if (process.env.ANTHROPIC_API_KEY)
+	envVars.ANTHROPIC_API_KEY = process.env.ANTHROPIC_API_KEY;
+if (process.env.OPENAI_API_KEY)
+	envVars.OPENAI_API_KEY = process.env.OPENAI_API_KEY;
+
+// Build a custom image with sandbox-agent pre-installed (slower first run, faster subsequent runs)
+const image = Image.base("ubuntu:22.04").runCommands(
+	"apt-get update && apt-get install -y curl ca-certificates",
+	"curl -fsSL https://releases.rivet.dev/sandbox-agent/latest/install.sh | sh",
+);
+
+console.log("Creating Daytona sandbox (first run builds the base image and may take a few minutes, subsequent runs are fast)...");
+const sandbox = await daytona.create({ envVars, image, autoStopInterval: 0 }, { timeout: 180 });
+
+await sandbox.process.executeCommand(
+	"nohup sandbox-agent server --no-token --host 0.0.0.0 --port 3000 >/tmp/sandbox-agent.log 2>&1 &",
+);
+
+const baseUrl = (await sandbox.getSignedPreviewUrl(3000, 4 * 60 * 60)).url;
+logInspectorUrl({ baseUrl });
+
+const cleanup = async () => {
+	await sandbox.delete(60);
+	process.exit(0);
+};
+process.once("SIGINT", cleanup);
+process.once("SIGTERM", cleanup);
+
+// When running as root in a container, Claude requires interactive permission prompts (bypass mode is not supported). Set autoApprovePermissions: true to auto-approve,
+// or leave false for interactive prompts.
+await runPrompt({
+	baseUrl,
+	autoApprovePermissions: process.env.AUTO_APPROVE_PERMISSIONS === "true",
+});
+await cleanup();