refactor(httpapi): fork server startup by flag (#24799)

packages/opencode/test/server/httpapi-experimental.test.ts

@@ -1,10 +1,9 @@
 import { afterEach, describe, expect, test } from "bun:test"
-import type { UpgradeWebSocket } from "hono/ws"
 import { Effect } from "effect"
 import { Flag } from "@opencode-ai/core/flag/flag"
 import { GlobalBus } from "@/bus/global"
 import { Instance } from "../../src/project/instance"
-import { InstanceRoutes } from "../../src/server/routes/instance"
+import { Server } from "../../src/server/server"
 import { ExperimentalPaths } from "../../src/server/routes/instance/httpapi/experimental"
 import { Session } from "@/session/session"
 import { Database } from "@/storage/db"
@@ -16,12 +15,11 @@ import { tmpdir } from "../fixture/fixture"
 void Log.init({ print: false })
 
 const original = Flag.OPENCODE_EXPERIMENTAL_HTTPAPI
-const websocket = (() => () => new Response(null, { status: 501 })) as unknown as UpgradeWebSocket
 const testWorktreeMutations = process.platform === "win32" ? test.skip : test
 
 function app() {
   Flag.OPENCODE_EXPERIMENTAL_HTTPAPI = true
-  return InstanceRoutes(websocket)
+  return Server.Default().app
 }
 
 function runSession<A, E>(fx: Effect.Effect<A, E, Session.Service>) {