Allow restarting failed server instances

platform_web/contracts/serverManagement.test.ts

@@ -0,0 +1,19 @@
+import { describe, expect, it } from "vitest";
+
+import { canStartServer, canStopServer } from "./serverManagement";
+import type { ServerInstanceState } from "../api/types";
+
+describe("server management lifecycle contracts", () => {
+  it("allows explicit starts from recoverable non-running states", () => {
+    const startable: ServerInstanceState[] = ["ready", "stopped", "failed"];
+    const blocked: ServerInstanceState[] = ["draft", "installing", "running", "deleted"];
+
+    expect(startable.every(canStartServer)).toBe(true);
+    expect(blocked.some(canStartServer)).toBe(false);
+  });
+
+  it("keeps stop limited to running servers", () => {
+    expect(canStopServer("running")).toBe(true);
+    expect(canStopServer("failed")).toBe(false);
+  });
+});