feat: default to zai-org/GLM-4.7 as the default model

src/lib/server/models.ts

@@ -246,13 +246,10 @@ const resolveDefaultModel = (modelList: ProcessedModel[]) => {
 		throw new Error("No models available to select default model");
 	}
 
-	if (config.DEFAULT_MODEL) {
-		const preferred = modelList.find(
-			(m) => m.name === config.DEFAULT_MODEL || m.id === config.DEFAULT_MODEL
-		);
-		if (preferred) {
-			return preferred;
-		}
+	const defaultModelId = config.DEFAULT_MODEL || "zai-org/GLM-4.7";
+	const preferred = modelList.find((m) => m.name === defaultModelId || m.id === defaultModelId);
+	if (preferred) {
+		return preferred;
 	}
 
 	return modelList[0];