feat(hermes): add prompt caching settings

tests/hermes-config-page-ui.test.js

@@ -139,6 +139,15 @@ test('Hermes 配置页会暴露全局显示与可靠性结构化配置字段', (
   }
 })
 
+test('Hermes 配置页会暴露提示缓存结构化配置字段', () => {
+  for (const id of [
+    'hm-prompt-caching-save',
+    'hm-prompt-cache-ttl',
+  ]) {
+    assert.match(source, new RegExp(`id="${id}"`), `缺少 ${id}`)
+  }
+})
+
 test('Hermes 配置页会暴露网关流式结构化配置字段', () => {
   for (const id of [
     'hm-streaming-save',
@@ -290,6 +299,7 @@ test('Hermes 配置页新增结构化配置不会暴露翻译 key', () => {
     key.includes('SecurityConfig') ||
     key.includes('HumanDelayConfig') ||
     key.includes('DisplayConfig') ||
+    key.includes('PromptCachingConfig') ||
     key.includes('StreamingConfig') ||
     key.includes('ExecutionLimits') ||
     key.includes('PrivacyConfig') ||

tests/hermes-prompt-caching-config.test.js

@@ -0,0 +1,50 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+
+import {
+  buildHermesPromptCachingConfigValues,
+  mergeHermesPromptCachingConfig,
+} from '../scripts/dev-api.js'
+
+test('Hermes 提示缓存配置读取会提供上游默认 TTL', () => {
+  const values = buildHermesPromptCachingConfigValues({})
+
+  assert.deepEqual(values, {
+    promptCacheTtl: '5m',
+  })
+})
+
+test('Hermes 提示缓存配置读取会规范化 YAML 中的 TTL', () => {
+  const values = buildHermesPromptCachingConfigValues({
+    prompt_caching: {
+      cache_ttl: '1H',
+    },
+  })
+
+  assert.equal(values.promptCacheTtl, '1h')
+})
+
+test('Hermes 提示缓存配置保存会保留无关 YAML 和未知字段', () => {
+  const next = mergeHermesPromptCachingConfig({
+    model: { provider: 'anthropic' },
+    prompt_caching: {
+      cache_ttl: '5m',
+      custom_flag: 'keep-prompt-cache',
+    },
+    compression: { enabled: true },
+  }, {
+    promptCacheTtl: '1h',
+  })
+
+  assert.deepEqual(next.model, { provider: 'anthropic' })
+  assert.deepEqual(next.compression, { enabled: true })
+  assert.equal(next.prompt_caching.cache_ttl, '1h')
+  assert.equal(next.prompt_caching.custom_flag, 'keep-prompt-cache')
+})
+
+test('Hermes 提示缓存配置保存会拒绝上游不支持的 TTL', () => {
+  assert.throws(
+    () => mergeHermesPromptCachingConfig({}, { promptCacheTtl: '30m' }),
+    /prompt_caching\.cache_ttl/,
+  )
+})