Sprint Day: Admin Navigation Icons

- Icons on Admin Navigation Dashboard should all have consistent line sizing, please refer to Figma for these pages

Current look:
<img width="168" alt="Image" src="https://github.com/user-attachments/assets/c9a234df-968b-45d8-ae24-0fd722e3bc0e" />

How it should look:

<img width="232" alt="Image" src="https://github.com/user-attachments/assets/a38e4fda-95cb-4c34-a601-ac4372e30218" />