feat(go): add Go model listing endpoint (#24304)

Co-authored-by: Frank <frank@anoma.ly>

packages/console/app/src/routes/zen/util/modelsHandler.ts

@@ -0,0 +1,36 @@
+import { ZenData } from "@opencode-ai/console-core/model.js"
+
+export async function optionsHandler() {
+  return new Response(null, {
+    status: 200,
+    headers: {
+      "Access-Control-Allow-Origin": "*",
+      "Access-Control-Allow-Methods": "GET, POST, OPTIONS",
+      "Access-Control-Allow-Headers": "Content-Type, Authorization",
+    },
+  })
+}
+
+export async function getHandler(opts: { modelList: "lite" | "full"; disabledModels?: string[] }) {
+  const zenData = ZenData.list(opts.modelList)
+
+  return new Response(
+    JSON.stringify({
+      object: "list",
+      data: Object.entries(zenData.models)
+        .filter(([id]) => !opts.disabledModels?.includes(id))
+        .filter(([id]) => !id.startsWith("alpha-"))
+        .map(([id, _model]) => ({
+          id,
+          object: "model",
+          created: Math.floor(Date.now() / 1000),
+          owned_by: "opencode",
+        })),
+    }),
+    {
+      headers: {
+        "Content-Type": "application/json",
+      },
+    },
+  )
+}