Refactor mkdocs.yml for improved navigation structure

- Adjusted indentation in mkdocs.yml to enhance readability and maintain consistency in the navigation hierarchy.
- Ensured that sections for "功能定制" and "数据分析" are clearly organized under their respective categories.

docs/mkdocs.yml

@@ -30,17 +30,17 @@ nav:
       - 配置选项: assistants/configuration.md
       - 提示词指南: assistants/prompts.md
       - 测试调试: assistants/testing.md
-  - 功能定制:
-      - 知识库: customization/knowledge-base.md
-      - 工具集成: customization/tools.md
-      - 语音配置: customization/voices.md
-      - 模型配置: customization/models.md
-      - 工作流: customization/workflows.md
-  - 数据分析:
-      - 仪表盘: analysis/dashboard.md
-      - 历史记录: analysis/history.md
-      - 效果评估: analysis/evaluation.md
-      - 自动化测试: analysis/autotest.md
+      - 功能定制:
+          - 知识库: customization/knowledge-base.md
+          - 工具集成: customization/tools.md
+          - 语音配置: customization/voices.md
+          - 模型配置: customization/models.md
+          - 工作流: customization/workflows.md
+      - 数据分析:
+          - 仪表盘: analysis/dashboard.md
+          - 历史记录: analysis/history.md
+          - 效果评估: analysis/evaluation.md
+          - 自动化测试: analysis/autotest.md
   - API 参考:
       - 概述: api-reference/index.md
       - WebSocket 协议: api-reference/websocket.md