Feature: 导航栏增加文字标识

### Describe the problem related to the feature request

经常找不到「指令」「插件设置」「插件市场」在哪里。
图标不如文字认得清。

我目前要快速滑动才行。

### Describe the solution you'd like

希望左侧导航栏除了有图标，还增加可选的文字标识。
有以下方案
1. 在图标下方显示文字。
2. 在图标右侧显示文字。

### Describe alternatives you've considered

_No response_

### Additional context

_No response_

Start by locating the left navigation entry point that renders the command, plugin settings, and plugin marketplace icons. Compare the proposed label positions and check whether the existing navigation has tests or configuration for optional labels. Done means users can enable readable text labels alongside or beneath those icons without losing the current navigation behavior.

Written by the indexing model from the issue text.