fix: 创建 agent 后刷新 loadMarkdownFilesForSubdir 缓存

新建 agent 后 clearAgentDefinitionsCache 漏清底层
loadMarkdownFilesForSubdir 的 memoize 缓存，导致新
agent 不会立即出现在列表中，需要重启才能生效。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/components/agents/new-agent-creation/wizard-steps/ConfirmStepWrapper.tsx

@@ -8,6 +8,7 @@ import { useSetAppState } from 'src/state/AppState.js'
 import type { Tools } from '../../../../Tool.js'
 import type { AgentDefinition } from '@claude-code-best/builtin-tools/tools/AgentTool/loadAgentsDir.js'
 import { getActiveAgentsFromList } from '@claude-code-best/builtin-tools/tools/AgentTool/loadAgentsDir.js'
+import { clearAgentDefinitionsCache } from '@claude-code-best/builtin-tools/tools/AgentTool/loadAgentsDir.js'
 import { editFileInEditor } from '../../../../utils/promptEditor.js'
 import { useWizard } from '../../../wizard/index.js'
 import { getNewAgentFilePath, saveAgentToFile } from '../../agentFileUtils.js'
@@ -62,6 +63,8 @@ export function ConfirmStepWrapper({
           }
         })
 
+        clearAgentDefinitionsCache()
+
         if (openInEditor) {
           const filePath = getNewAgentFilePath({
             source: wizardData.location!,