fix(hermes): validate raw config saves

tests/hermes-config-raw.test.js

@@ -0,0 +1,25 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+
+import { validateHermesConfigYamlText } from '../scripts/dev-api.js'
+
+test('Hermes 原始配置保存前会拒绝无效 YAML', () => {
+  assert.throws(
+    () => validateHermesConfigYamlText('model:\n  default: gpt-4o\n    provider: openai\n'),
+    /config\.yaml YAML 格式错误/,
+  )
+})
+
+test('Hermes 原始配置保存前会拒绝非对象顶层 YAML', () => {
+  assert.throws(
+    () => validateHermesConfigYamlText('- model\n- display\n'),
+    /config\.yaml 顶层必须是对象/,
+  )
+})
+
+test('Hermes 原始配置保存前允许空内容与对象顶层 YAML', () => {
+  assert.deepEqual(validateHermesConfigYamlText(''), {})
+  assert.deepEqual(validateHermesConfigYamlText('model:\n  default: gpt-4o\n'), {
+    model: { default: 'gpt-4o' },
+  })
+})