feat(app): improve desktop multi-server support (#30678)

Co-authored-by: Brendan Allan <git@brendonovich.dev>

packages/app/src/utils/server-health.test.ts

@@ -25,6 +25,31 @@ describe("checkServerHealth", () => {
     expect(result).toEqual({ healthy: true, version: "1.2.3" })
   })
 
+  test("allows slow servers thirty seconds by default", async () => {
+    const timeout = Object.getOwnPropertyDescriptor(AbortSignal, "timeout")
+    let timeoutMs = 0
+    Object.defineProperty(AbortSignal, "timeout", {
+      configurable: true,
+      value: (ms: number) => {
+        timeoutMs = ms
+        return new AbortController().signal
+      },
+    })
+
+    const fetch = (async () =>
+      new Response(JSON.stringify({ healthy: true, version: "1.2.3" }), {
+        status: 200,
+        headers: { "content-type": "application/json" },
+      })) as unknown as typeof globalThis.fetch
+
+    await checkServerHealth(server, fetch).finally(() => {
+      if (timeout) Object.defineProperty(AbortSignal, "timeout", timeout)
+      if (!timeout) Reflect.deleteProperty(AbortSignal, "timeout")
+    })
+
+    expect(timeoutMs).toBe(30_000)
+  })
+
   test("returns unhealthy when request fails", async () => {
     const fetch = (async () => {
       throw new Error("network")