feat(hermes): add delegation model override config

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

@@ -288,6 +288,8 @@ test('Hermes 配置页会暴露执行与委派限制结构化配置字段', () =
     'hm-delegation-child-timeout-seconds',
     'hm-delegation-max-concurrent-children',
     'hm-delegation-max-spawn-depth',
+    'hm-delegation-model',
+    'hm-delegation-provider',
     'hm-delegation-orchestrator-enabled',
     'hm-delegation-subagent-auto-approve',
     'hm-delegation-inherit-mcp-toolsets',

tests/hermes-execution-limits-config.test.js

@@ -20,6 +20,8 @@ test('Hermes 执行与委派限制读取会提供上游默认值', () => {
     delegationOrchestratorEnabled: true,
     delegationSubagentAutoApprove: false,
     delegationInheritMcpToolsets: true,
+    delegationModel: '',
+    delegationProvider: '',
   })
 })
 
@@ -38,6 +40,8 @@ test('Hermes 执行与委派限制读取会回显 YAML 字段', () => {
       orchestrator_enabled: false,
       subagent_auto_approve: true,
       inherit_mcp_toolsets: false,
+      model: 'google/gemini-3-flash-preview',
+      provider: 'openrouter',
     },
   })
 
@@ -51,6 +55,8 @@ test('Hermes 执行与委派限制读取会回显 YAML 字段', () => {
   assert.equal(values.delegationOrchestratorEnabled, false)
   assert.equal(values.delegationSubagentAutoApprove, true)
   assert.equal(values.delegationInheritMcpToolsets, false)
+  assert.equal(values.delegationModel, 'google/gemini-3-flash-preview')
+  assert.equal(values.delegationProvider, 'openrouter')
 })
 
 test('Hermes 执行与委派限制保存会保留未知字段并写入上游结构', () => {
@@ -77,6 +83,8 @@ test('Hermes 执行与委派限制保存会保留未知字段并写入上游结
     delegationOrchestratorEnabled: false,
     delegationSubagentAutoApprove: true,
     delegationInheritMcpToolsets: false,
+    delegationModel: 'anthropic/claude-haiku-4.6',
+    delegationProvider: 'anthropic',
   })
 
   assert.deepEqual(next.model, { provider: 'anthropic' })
@@ -92,8 +100,25 @@ test('Hermes 执行与委派限制保存会保留未知字段并写入上游结
   assert.equal(next.delegation.orchestrator_enabled, false)
   assert.equal(next.delegation.subagent_auto_approve, true)
   assert.equal(next.delegation.inherit_mcp_toolsets, false)
-  assert.equal(next.delegation.model, 'child-model')
-  assert.equal(next.delegation.provider, 'openrouter')
+  assert.equal(next.delegation.model, 'anthropic/claude-haiku-4.6')
+  assert.equal(next.delegation.provider, 'anthropic')
+  assert.equal(next.delegation.custom_flag, 'keep-delegation')
+})
+
+test('Hermes 执行与委派限制保存空子 Agent 模型覆盖会删除对应字段', () => {
+  const next = mergeHermesExecutionLimitsConfig({
+    delegation: {
+      model: 'child-model',
+      provider: 'openrouter',
+      custom_flag: 'keep-delegation',
+    },
+  }, {
+    delegationModel: '  ',
+    delegationProvider: '',
+  })
+
+  assert.equal(Object.hasOwn(next.delegation, 'model'), false)
+  assert.equal(Object.hasOwn(next.delegation, 'provider'), false)
   assert.equal(next.delegation.custom_flag, 'keep-delegation')
 })