fix: remove the suggest model in provider page

src/sse/services/deletedModels.js

@@ -0,0 +1,24 @@
+import { isDeletedModel } from "@/lib/db";
+import { errorResponse } from "open-sse/utils/error.js";
+import { HTTP_STATUS } from "open-sse/config/runtimeConfig.js";
+
+/**
+ * Return a not-found response when a resolved provider/model pair has been
+ * permanently deleted by an administrator.
+ */
+export async function getDeletedModelResponse(provider, model) {
+  try {
+    if (!await isDeletedModel(provider, model)) return null;
+
+    return errorResponse(
+      HTTP_STATUS.NOT_FOUND,
+      `Model ${provider}/${model} has been deleted by an administrator`,
+    );
+  } catch (error) {
+    console.log("Error checking deleted model status:", error);
+    return errorResponse(
+      HTTP_STATUS.SERVER_ERROR,
+      "Unable to verify whether the requested model has been deleted",
+    );
+  }
+}